- Table of Contents
-
- 03-IP Routing Volume
- 00-IP Routing Volume Organization
- 01-IP Routing Table Display Commands
- 02-Static Routing Commands
- 03-RIP Commands
- 04-OSPF Commands
- 05-IS-IS Commands
- 06-BGP Commands
- 07-IPv6 Static Routing Commands
- 08-IPv6 RIPng Commands
- 09-IPv6 OSPFv3 commands
- 10-IPv6 IS-IS Commands
- 11-IPv6 BGP Commands
- 12-Route Policy Commands
- Related Documents
-
Title | Size | Download |
---|---|---|
06-BGP Commands | 263.07 KB |
Table of Contents
balance (BGP/BGP-VPN instance view)
bestroute as-path-neglect (BGP/BGP-VPN instance view)
bestroute compare-med (BGP/BGP-VPN instance view)
bestroute med-confederation (BGP/BGP-VPN instance view)
compare-different-as-med (BGP/BGP-VPN instance view)
dampening (BGP/BGP-VPN instance view)
default local-preference (BGP/BGP-VPN instance view)
default med (BGP/BGP-VPN instance view)
default-route imported (BGP/BGP-VPN instance view)
display bgp routing-table as-path-acl
display bgp routing-table cidr
display bgp routing-table community
display bgp routing-table community-list
display bgp routing-table dampened
display bgp routing-table dampening parameter
display bgp routing-table different-origin-as
display bgp routing-table flap-info
display bgp routing-table label
display bgp routing-table peer
display bgp routing-table regular-expression
display bgp routing-table statistic
filter-policy export (BGP/BGP-VPN instance view)
filter-policy import (BGP/BGP-VPN instance view)
graceful-restart timer restart
graceful-restart timer wait-for-rib
group (BGP/BGP-VPN instance view)
import-route (BGP/BGP-VPN instance view)
network (BGP/BGP-VPN instance view)
network short-cut (BGP/BGP-VPN instance view)
peer advertise-community (BGP/BGP-VPN instance view)
peer advertise-ext-community (BGP/BGP-VPN instance view)
peer allow-as-loop (BGP/BGP-VPN instance view)
peer as-number (BGP/BGP-VPN instance view)
peer as-path-acl (BGP/BGP-VPN instance view)
peer capability-advertise conventional
peer capability-advertise route-refresh
peer connect-interface (BGP/BGP-VPN instance view)
peer default-route-advertise (BGP/BGP-VPN instance view)
peer description (BGP/BGP-VPN instance view)
peer ebgp-max-hop (BGP/BGP-VPN instance view)
peer fake-as (BGP/BGP-VPN instance view)
peer filter-policy (BGP/BGP-VPN instance view)
peer group (BGP/BGP-VPN instance view)
peer ignore (BGP/BGP-VPN instance view)
peer keep-all-routes (BGP/BGP-VPN instance view)
peer log-change (BGP/BGP-VPN instance view)
peer next-hop-local (BGP/BGP-VPN instance view)
peer preferred-value (BGP/BGP-VPN instance view)
peer public-as-only (BGP/BGP-VPN instance view)
peer reflect-client (BGP/BGP-VPN instance view)
peer route-limit (BGP/BGP-VPN instance view)
peer route-policy (BGP/BGP-VPN instance view)
peer route-update-interval (BGP/BGP-VPN instance view)
peer substitute-as (BGP/BGP-VPN instance view)
peer timer (BGP/BGP-VPN instance view)
preference (BGP/BGP-VPN instance view)
reflect between-clients (BGP view)
reflector cluster-id (BGP view)
timer (BGP/BGP-VPN instance view)
The term “router” in this document refers to a router in a generic sense or a Layer 3 switch.
BGP Configuration Commands
For more information about routing policy configuration commands in this document, refer to Routing Policy Commands in the IP Routing Volume.
aggregate
Syntax
aggregate ip-address { mask | mask-length } [ as-set | attribute-policy route-policy-name | detail-suppressed | origin-policy route-policy-name | suppress-policy route-policy-name ] *
undo aggregate ip-address { mask | mask-length }
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
ip-address: Summary address.
mask: Summary route mask, in dotted decimal notation.
mask-length: Length of summary route mask, in the range 0 to 32.
as-set: Creates a summary with AS set.
attribute-policy route-policy-name: Sets the attributes of the summary route according to the routing policy The routing policy name is a string of 1 to 19 characters.
detail-suppressed: Only advertises the summary route.
suppress-policy route-policy-name: Suppresses specific routes defined in the routing policy. The routing policy name is a string of 1 to 19 characters.
origin-policy route-policy-name: References the routing policy to specify routes for summarization. The routing policy name is a string of 1 to 19 characters.
The keywords of the command are described as follows:
Table 1-1 Functions of the keywords
Keywords |
Function |
as-set |
Used to create a summary route, whose AS path contains the AS path information of summarized routes. Use this keyword carefully when many AS paths need to be summarized, because the frequent changes of these specific routes may lead to route oscillation. |
detail-suppressed |
This keyword does not suppress the summary route, but it suppresses the advertisement of all the more specific routes. To summarize only some specific routes, use the peer filter-policy command. |
suppress-policy |
Used to create a summary route and suppress the advertisement of some summarized routes. If you want to suppress some routes selectively and leave other routes still advertised, use the if-match clause of the route-policy command. |
origin-policy |
Selects only routes satisfying the routing policy for route summarization. |
attribute-policy |
Sets attributes except the AS-PATH attribute for the summary route. The same work can be done by using the peer route-policy command. |
Description
Use the aggregate command to create a summary route in the BGP routing table.
Use the undo aggregate command to remove a summary route.
By default, no summary route is configured.
Examples
# In BGP view, create a summary of 192.213.0.0/16 in the BGP routing table.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] aggregate 192.213.0.0 255.255.0.0
# In BGP-VPN instance view, create a summary of 192.213.0.0/16 in BGP routing table (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] aggregate 192.213.0.0 255.255.0.0
balance (BGP/BGP-VPN instance view)
Syntax
balance number
undo balance
View
BGP view/VPN instance view
Default Level
2: System level
Parameters
number: Number of BGP routes for load balancing, in the range 1 to 4. When it is set to 1, load balancing is disabled.
Description
Use the balance command to configure the number of BGP routes for load balancing.
Use the undo balance command to disable load balancing.
By default, no load balancing is configured.
Unlike IGP, BGP has no explicit metric for making load balancing decision. Instead, it implements load balancing using route selection rules.
Related commands: display bgp routing-table.
Examples
# In BGP view, set the number of routes participating in BGP load balancing to 2.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] balance 2
# In BGP-VPN instance view, set the number of routes participating in BGP load balancing to 2 (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] balance 2
bestroute as-path-neglect (BGP/BGP-VPN instance view)
Syntax
bestroute as-path-neglect
undo bestroute as-path-neglect
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
None
Description
Use the bestroute as-path-neglect command to configure BGP not to consider the AS_PATH during best route selection.
Use the undo bestroute as-path-neglect command to configure BGP to consider the AS_PATH during best route selection.
By default, BGP considers the AS_PATH during best route selection.
Examples
# In BGP view, ignore AS_PATH in route selection.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] bestroute as-path-neglect
# In BGP-VPN instance view, ignore AS_PATH in route selection (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] bestroute as-path-neglect
bestroute compare-med (BGP/BGP-VPN instance view)
Syntax
bestroute compare-med
undo bestroute compare-med
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
None
Description
Use the bestroute compare-med command to enable the comparison of the MED for paths from each AS.
Use the undo bestroute compare-med command to disable this comparison.
This comparison is not enabled by default.
Examples
# In BGP view, enable the comparison of MEDs for paths from each AS when selecting the best route.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] bestroute compare-med
# In BGP-VPN instance view, enable the comparison of MED for paths from each AS when selecting the best route. (The VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] bestroute compare-med
bestroute med-confederation (BGP/BGP-VPN instance view)
Syntax
bestroute med-confederation
undo bestroute med-confederation
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
None
Description
Use the bestroute med-confederation command to enable the comparison of the MED for paths from confederation peers during best route selection.
Use the undo bestroute med-confederation command to disable the comparison.
The comparison is not enabled by default.
The system only compares MED values for paths from peers within the confederation. Paths from external ASs are advertised throughout the confederation without MED comparison.
Examples
# In BGP view, enable the comparison of the MED for paths from peers within the confederation.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] bestroute med-confederation
# In BGP-VPN instance view, enable the comparison of the MED for paths from peers within the confederation. (The VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] bestroute med-confederation
bgp
Syntax
bgp as-number
undo bgp [ as-number ]
View
System view
Default Level
2: System level
Parameters
as-number: Specifies the local AS number from 1 to 65535.
Description
Use the bgp command to enable BGP and enter the BGP view.
Use the undo bgp command to disable BGP.
By default, BGP is not enabled.
Examples
# Enable BGP and set local AS number to 100.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp]
compare-different-as-med (BGP/BGP-VPN instance view)
Syntax
compare-different-as-med
undo compare-different-as-med
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
None
Description
Use the compare-different-as-med command to enable the comparison of the MED for paths from peers in different ASs.
Use the undo compare-different-as-med command to disable the comparison.
The comparison is disabled by default.
If several paths to one destination are available, the path with the smallest MED is selected.
Do not use this command unless associated ASs adopt the same IGP protocol and routing selection method.
Examples
# In BGP view, enable the comparison of the MED for paths from peers in different ASs.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] compare-different-as-med
# In BGP-VPN instance view, enable the comparison of the MED for paths from peers in different ASs (The VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] compare-different-as-med
confederation id
Syntax
confederation id as-number
undo confederation id
View
BGP view
Default Level
2: System level
Parameters
as-number: Number of the AS that contains multiple sub-ASs, in the range 1 to 65535.
Description
Use the confederation id command to configure a confederation ID.
Use the undo confederation id command to remove a specified confederation.
By default, no confederation ID is configured.
Configuring a confederation can reduce IBGP connections in a large AS. You can split the AS into several sub-ASs, and each sub-AS remains fully meshed. These sub-ASs form a confederation. Key IGP attributes of a route, such as the next hop, MED, local preference, are not discarded when crossing each sub-AS. The sub-ASs still look like a whole from the perspective of other ASs. This can ensure the integrity of the former AS, and solve the problem of too many IBGP connections in the AS.
Related commands: confederation nonstandard and confederation peer-as.
Examples
# Confederation 9 consists of four sub-ASs, namely, 38, 39, 40 and 41. The peer 10.1.1.1 is a member of the confederation while the peer 200.1.1.1 is outside of the confederation. Take sub AS 41 as an example.
<Sysname> system-view
[Sysname] bgp 41
[Sysname-bgp] confederation id 9
[Sysname-bgp] confederation peer-as 38 39 40
[Sysname-bgp] group Confed38 external
[Sysname-bgp] peer Confed38 as-number 38
[Sysname-bgp] peer 10.1.1.1 group Confed38
[Sysname-bgp] group Remote98 external
[Sysname-bgp] peer Remote98 as-number 98
[Sysname-bgp] peer 200.1.1.1 group Remote98
confederation nonstandard
Syntax
confederation nonstandard
undo confederation nonstandard
View
BGP view
Default Level
2: System level
Parameters
None
Description
Use the confederation nonstandard command to make the router compatible with routers not compliant with RFC3065 in the confederation.
Use the undo confederation nonstandard command to restore the default.
By default, all routers in the confederation comply with RFC3065.
Related commands: confederation id and confederation peer-as.
Examples
# AS100 contains routers not compliant with RFC3065 and comprises two sub-ASs, 64000 and 65000.
<Sysname> system-view
[Sysname] bgp 64000
[Sysname-bgp] confederation id 100
[Sysname-bgp] confederation peer-as 65000
[Sysname-bgp] confederation nonstandard
confederation peer-as
Syntax
confederation peer-as as-number-list
undo confederation peer-as [ as-number-list ]
View
BGP view
Default Level
2: System level
Parameters
as-number-list: Sub-AS number list. Up to 32 sub-ASs can be configured in one command line. The expression is as-number-list = as-number &<1-32>, in which as-number specifies a sub-AS number, and &<1-32> indicates up to 32 numbers can be specified.
Description
Use the confederation peer-as command to specify confederation peer sub-ASs.
Use the undo confederation peer-as command to remove specified confederation peer sub-ASs.
By default, no confederation peer sub-ASs are configured.
Before this configuration, the confederation id command must be used to specify the confederation for the sub-ASs.
If the undo confederation peer-as command without the as-number-list argument is used, all confederation peer sub-ASs are removed.
Related commands: confederation nonstandard and confederation id.
Examples
# Specify confederation peer sub ASs 2000 and 2001.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] confederation id 10
[Sysname-bgp] confederation peer-as 2000 2001
dampening (BGP/BGP-VPN instance view)
Syntax
dampening [ half-life-reachable half-life-unreachable reuse suppress ceiling | route-policy route-policy-name ] *
undo dampening
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
half-life-reachable: Specifies a half-life for active routes from 1 to 45 minutes. By default, the value is 15 minutes.
half-life-unreachable: Specifies a half-life for suppressed routes from 1 to 45 minutes. By default, the value is 15 minutes.
reuse: Specifies a reuse threshold value for suppressed routes from 1 to 20000. A suppressed route whose penalty value decreases under the value is reused. By default, the reuse value is 750.
suppress: Specifies a suppression threshold from 1 to 20000. The route with a penalty value higher than the threshold is suppressed. The default value is 2000.
ceiling: Specifies a ceiling penalty value from 1001 to 20000. The value must be bigger than the suppress value. By default, the value is 16000.
route-policy-name: Routing policy name, a string of 1 to 19 characters.
half-life-reachable, half-life-unreachable, reuse, suppress and ceiling are mutually dependent. Once any one is configured, all the others should also be specified accordingly.
Description
Use the dampening command to enable BGP route dampening and/or configure dampening parameters.
Use the undo dampening command to disable route dampening.
By default, no route dampening is configured.
The command dampens only EBGP routes rather than IBGP routes.
Related commands: reset bgp dampening, reset bgp flap-info, display bgp routing-table dampened, display bgp routing-table dampening parameter and display bgp routing-table flap-info.
Examples
# In BGP view, configure BGP route dampening.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] dampening 15 15 1000 2000 10000
# In BGP-VPN instance view, configure BGP route dampening (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] dampening 15 15 1000 2000 10000
default ipv4-unicast
Syntax
default ipv4-unicast
undo default ipv4-unicast
View
BGP view
Default Level
2: System level
Parameters
None
Description
Use the default ipv4-unicast command to enable the default use of IPv4 unicast address family for the peers that are established using the peer as-number command.
Use the undo default ipv4-unicast command to disable the default use of IPv4 unicast address family for the peers that are established using the peer as-number command.
The use of IPv4 unicast address family is enabled by default.
Note that:
l The default ipv4-unicast or undo default ipv4-unicast command applies to only BGP peers that are established after it is executed.
l The default ipv4-unicast or undo default ipv4-unicast command applies to only BGP peers that are established using the peer as-number command.
l After executing the undo default ipv4-unicast command, you can use the peer enable command to enable the use of IPv4 address family for a peer.
Examples
# Enable the default use of IPv4 unicast address family for the peers that are established using the peer as-number command.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] default ipv4-unicast
default local-preference (BGP/BGP-VPN instance view)
Syntax
default local-preference value
undo default local-preference
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
value: Default local preference, in the range 0 to 4294967295. The larger the value is, the higher the preference is.
Description
Use the default local-preference command to configure the default local preference.
Use the undo default local-preference command to restore the default value.
By default, the default local preference is 100.
Using this command can affect BGP route selection.
Examples
# In BGP view, set the default local preference to 180.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] default local-preference 180
# In BGP-VPN instance view, set the default local preference to 180 (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] default local-preference 180
default med (BGP/BGP-VPN instance view)
Syntax
default med med-value
undo default med
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
med-value: Default MED value, in the range 0 to 4294967295.
Description
Use the default med command to specify a default MED value.
Use the undo default med command to restore the default.
By default, the default med-value is 0.
Multi-exit discriminator (MED) is an external metric for routes. Different from local preference, MED is exchanged between ASs and will stay in the AS once it enters the AS. The route with a lower MED is preferred. When a router running BGP obtains several routes with an identical destination but different next-hops from various external peers, it will select the best route depending on the MED value. In the case that all other conditions are the same, the system first selects the route with the smallest MED as the best external route.
Examples
# In BGP view, configure the default MED as 25.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] default med 25
# In BGP-VPN instance view, configure the default MED as 25 (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] default med 25
default-route imported (BGP/BGP-VPN instance view)
Syntax
default-route imported
undo default-route imported
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
None
Description
Use the default-route imported command to allow default route redistribution into the BGP routing table.
Use the undo default-route imported command to disallow the redistribution.
By default, default route redistribution is not allowed.
Using the default-route imported command cannot redistribute default routes. To do so, use the import-route command.
Related commands: import-route.
Examples
# In BGP view, allow default route redistribution from OSPF into BGP.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] default-route imported
[Sysname-bgp] import-route ospf 1
# In BGP-VPN instance view, enable redistributing default route from OSPF into BGP (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] default-route imported
[Sysname-bgp-vpn1] import-route ospf 1
display bgp group
Syntax
display bgp group [ group-name ]
View
Any view
Default Level
1: Monitor level
Parameters
group-name: Peer group name, a string of 1 to 47 characters.
Description
Use the display bgp group command to display peer group information.
Examples
# Display the information of the peer group aaa.
<Sysname> display bgp group aaa
BGP peer-group is aaa
Remote AS 200
Type : external
Maximum allowed prefix number: 4294967295
Threshold: 75%
Configured hold timer value: 180
Keepalive timer value: 60
Minimum time between advertisement runs is 30 seconds
Peer Preferred Value: 0
No routing policy is configured
Members:
Peer V AS MsgRcvd MsgSent OutQ PrefRcv Up/Down State
2.2.2.1 4 200 0 0 0 0 00:00:35 Active
Table 1-2 display bgp group command output description
Field |
Description |
BGP peer-group |
Name of the BGP peer group |
Remote AS |
AS number of peer group |
type |
Type of the BGP peer group: IBGP or EBGP |
Maximum allowed prefix number |
Maximum prefixes allowed to receive from the peer group |
Threshold |
Percentage of received prefixes from the peer group to maximum prefixes allowed to receive from the peer group; If the percentage is reached, the system generates alarm messages. |
Configured hold timer value |
Holdtime interval |
Keepalive timer value |
Keepalive interval |
Minimum time between advertisement runs |
Minimum interval for route advertisements |
Peer Preferred Value |
Preferred value specified for the routes from the peer |
No routing policy is configured |
No routing policy is configured. |
Members |
Detailed information of the members in the peer group |
Peer |
IPv4 address of the peer |
V |
BGP version running on the peer |
AS |
AS number of the peer |
MsgRcvd |
Number of messages received |
MsgSent |
Number of messages sent |
OutQ |
Number of messages to be sent |
PrefRcv |
Number of prefixes received |
Up/Down |
The lasting time of the session/the lasting time of the current state (when no session is established) |
State |
State machine state of the peer |
display bgp network
Syntax
display bgp network
View
Any view
Default Level
1: Monitor level
Parameters
None
Description
Use the display bgp network command to display routing information advertised with the network command.
Examples
# Display routing information advertised with the network command.
<Sysname> display bgp network
BGP Local Router ID is 10.1.4.2.
Local AS Number is 400.
Network Mask Route-policy Short-cut
100.1.2.0 255.255.255.0
100.1.1.0 255.255.255.0 Short-cut
Table 1-3 display bgp network command output description
Field |
Description |
BGP Local Router ID |
BGP Local Router ID |
Local AS Number |
Local AS Number |
Network |
Network address |
Mask |
Mask |
Route-policy |
Routing policy |
Short-cut |
Short-cut route |
display bgp paths
Syntax
display bgp paths [ as-regular-expression ]
View
Any view
Default Level
1: Monitor level
Parameters
as-regular-expression: AS path regular expression, a string of 1 to 80 characters.
Description
Use the display bgp paths command to display information about BGP AS paths.
Examples
# Display information about BGP paths matching the AS path regular expression.
<Sysname> display bgp paths ^200
Address Hash Refcount MED Path/Origin
0x5917100 11 1 0 200 300i
Table 1-4 display bgp paths command output description
Field |
Description |
|
Address |
Route address in the local database, in dotted hexadecimal notation |
|
Hash |
Hash index |
|
Refcount |
Count of routes that reference the path |
|
MED |
MED of the path |
|
Path |
AS_PATH attribute of the path, recording the ASs it has passed to avoid routing loops |
|
Origin |
Origin attribute of the path: |
|
i |
Indicates the route is interior to the AS. Summary routes and routes defined using the network command are considered IGP routes. |
|
e |
Indicates that a route is learned from the exterior gateway protocol (EGP). |
|
? |
Short for INCOMPLETE. It indicates that the origin of a route is unknown and the route is learned by other means. |
display bgp peer
Syntax
display bgp peer [ ip-address { log-info | verbose } | group-name log-info | verbose ]
View
Any view
Default Level
1: Monitor level
Parameters
ip-address: IP address of an peer to be displayed, in dotted decimal notation.
group-name: Name of a peer group to be displayed, a string of 1 to 47 characters.
log-info: Displays the log information of the specified peer.
verbose: Displays the detailed information of the peer/peer group.
Description
Use the display bgp peer command to display peer/peer group information.
Examples
# Display the detailed information of the peer 10.110.25.20.
<Sysname> display bgp peer 10.110.25.20 verbose
Peer: 10.110.25.20 Local: 2.2.2.2
Type: EBGP link
BGP version 4, remote router ID 1.1.1.1
BGP current state: Established, Up for 00h01m51s
BGP current event: RecvKeepalive
BGP last state: OpenConfirm
Port: Local - 1029 Remote - 179
Configured: Active Hold Time: 180 sec Keepalive Time: 60 sec
Received : Active Hold Time: 180 sec
Negotiated: Active Hold Time: 180 sec
Peer optional capabilities:
Peer support bgp multi-protocol extended
Peer support bgp route refresh capability
Address family IPv4 Unicast: advertised and received
Received: Total 5 messages, Update messages 1
Sent: Total 4 messages, Update messages 0
Maximum allowed prefix number: 4294967295
Threshold: 75%
Minimum time between advertisement runs is 30 seconds
Optional capabilities:
Route refresh capability has been enabled
Peer Preferred Value: 0
BFD: Enabled
Routing policy configured:
No routing policy is configured
Table 1-5 display bgp peer command output description
Field |
Description |
Peer |
IP address of the peer |
Local |
Local router ID |
Type |
Peer type |
BGP version |
BGP version |
remote router ID |
Router ID of the peer |
BGP current state |
Current state of the peer |
BGP current event |
Current event of the peer |
BGP last state |
Previous state of the peer |
Port |
TCP port numbers of the local router and its peer |
Configured: Active Hold Time |
Local holdtime interval |
Keepalive Time |
Local keepalive interval |
Received: Active Hold Time |
Remote holdtime interval |
Negotiated: Active Hold Time |
Negotiated holdtime interval |
Peer optional capabilities |
Optional capabilities supported by the peer, including BGP multiprotocol extensions and route refresh |
Address family IPv4 Unicast |
Routes are advertised and received in IPv4 unicasts. |
Received |
Total numbers of received packets and updates |
Sent |
Total numbers of sent packets and updates |
Maximum allowed prefix number |
Maximum allowed prefix number |
Threshold |
Percentage of received prefixes from the peer group to maximum prefixes allowed to receive from the peer group; If the percentage is reached, the system generates alarm messages. |
Minimum time between advertisement runs |
Minimum route advertisement interval |
Optional capabilities |
Optional capabilities enabled by the peer |
Peer Preferred Value |
Preferred value specified for the routes from the peer |
BFD |
BFD is enabled or disabled. |
Routing policy configured |
Local routing policy |
display bgp routing-table
Syntax
display bgp routing-table [ ip-address [ { mask | mask-length } [ longer-prefixes ] ] ]
View
Any view
Default Level
1: Monitor level
Parameters
ip-address: Destination IP address.
mask: Network mask, in dotted decimal notation.
mask-length: Mask length, in the range 0 to 32.
longer-prefixes: Matches the longest prefix.
Description
Use the display bgp routing-table command to display specified BGP routing information in the BGP routing table.
Examples
# Display BGP routing table information.
<Sysname> display bgp routing-table
Total Number of Routes: 1
BGP Local router ID is 10.10.10.1
Status codes: * - valid, > - best, d - damped,
h - history, i - internal, s - suppressed, S - Stale
Origin : i - IGP, e - EGP, ? - incomplete
Network NextHop MED LocPrf PrefVal Path/Ogn
*> 40.40.40.0/24 20.20.20.1 0 200 300i
Table 1-6 display bgp routing command output description
Field |
Description |
|
Total Number of Routes |
Total Number of Routes |
|
BGP Local router ID |
BGP local router ID |
|
Status codes |
Status codes: * – valid > – best d – damped h – history i – internal (IGP) s – summary suppressed (suppressed) S – Stale |
|
Origin |
i – IGP (originated in the AS) e – EGP (learned through EGP) ? – incomplete (learned by some other means) |
|
Network |
Destination network address |
|
Next Hop |
Next hop IP address |
|
MED |
MULTI_EXIT_DISC attribute |
|
LocPrf |
Local preference value |
|
PrefVal |
Preferred value of the route |
|
Path |
AS_PATH attribute, recording the ASs the packet has passed to avoid routing loops |
|
PrefVal |
Preferred value |
|
Ogn |
Origin attribute of the route, which can be one of the following values: |
|
i |
Indicates that the route is interior to the AS. Summary routes and the routes injected with the network command are considered IGP routes. |
|
e |
Indicates that the route is learned from the Exterior Gateway Protocol (EGP). |
|
? |
Short for INCOMPLETE. It indicates that the origin of the route is unknown and the route is learned by other means. |
display bgp routing-table as-path-acl
Syntax
display bgp routing-table as-path-acl as-path-acl-number
View
Any view
Default Level
1: Monitor level
Parameters
as-path-acl-number: Displays routing information permitted by the AS path ACL, which is specifies with a number from 1 to 256.
Description
Use the display bgp routing as-path-acl command to display BGP routes permitted by an as-path ACL.
Examples
# Display BGP routes permitted by AS path ACL 1.
<Sysname> display bgp routing-table as-path-acl 1
BGP Local router ID is 20.20.20.1
Status codes: * - valid, > - best, d - damped,
h - history, i - internal, s - suppressed, S - Stale
Origin : i - IGP, e - EGP, ? - incomplete
Network NextHop MED LocPrf PrefVal Path/Ogn
*> 40.40.40.0/24 30.30.30.1 0 0 300i
Refer to Table 1-6 for description on the fields above.
display bgp routing-table cidr
Syntax
display bgp routing-table cidr
View
Any view
Default Level
1: Monitor level
Parameters
None
Description
Use the display bgp routing-table cidr command to display BGP CIDR (Classless Inter-Domain Routing) routing information.
Examples
# Display BGP CIDR routing information.
<Sysname> display bgp routing-table cidr
Total Number of Routes: 1
BGP Local router ID is 20.20.20.1
Status codes: * - valid, > - best, d - damped,
h - history, i - internal, s - suppressed, S - Stale
Origin : i - IGP, e - EGP, ? - incomplete
Network NextHop MED LocPrf PrefVal Path/Ogn
*> 40.40.40.0/24 30.30.30.1 0 0 300i
Refer to Table 1-6 for description on the above fields.
display bgp routing-table community
Syntax
display bgp routing-table community [ aa:nn&<1-13> ] [ no-advertise | no-export | no-export-subconfed ] * [ whole-match ]
View
Any view
Default Level
1: Monitor level
Parameters
aa:nn: Community number. Both aa and nn are in the range 0 to 65535.
&<1-13>: Argument before it can be entered up to 13 times.
no-advertise: Displays BGP routes that cannot be advertised to any peer.
no-export: Displays BGP routes that cannot be advertised out the AS. If a confederation is configured, it displays routes that cannot be advertised out the confederation, but can be advertised to other sub ASs in the confederation.
no-export-subconfed: Displays BGP routes that cannot be advertised out the AS or to other sub ASs in the configured confederation.
whole-match: Displays the BGP routes exactly matching the specified community attribute.
Description
Use the display bgp routing community command to display BGP routing information with the specified BGP community attribute.
Examples
# Display BGP routing information with the specified BGP community.
<Sysname> display bgp routing-table community 11:22
BGP Local router ID is 10.10.10.1
Status codes: * - valid, > - best, d - damped,
h - history, i - internal, s - suppressed, S - Stale
Origin : i - IGP, e - EGP, ? - incomplete
Network NextHop MED LocPrf PrefVal Path/Ogn
*> 10.10.10.0/24 0.0.0.0 0 0 i
*> 40.40.40.0/24 20.20.20.1 0 200 300i
Refer to Table 1-6 for description on the fields above.
display bgp routing-table community-list
Syntax
display bgp routing-table community-list { basic-community-list-number [ whole-match ] | adv-community-list-number }&<1-16>
View
Any view
Default Level
1: Monitor level
Parameters
basic-community-list-number: Specifies a basic community-list number from 1 to 99.
adv-community-list-number: Specifies an advanced community-list number from 100 to 199.
whole-match: Displays routes exactly matching the specified basic-community-list.
&<1-16>: Specifies the argument before it can be entered up to 16 times.
Description
Use the display bgp routing-table community-list command to display BGP routing information matching the specified BGP community list.
Examples
# Display BGP routing information matching BGP community list 100.
<Sysname> display bgp routing-table community-list 100
BGP Local router ID is 1.2.3.4
Status codes: * - valid, > - best, d - damped,
h - history, i - internal, s - suppressed,
Origin codes: i - IGP, e - EGP, ? - incomplete
Network NextHop Metric LocPrf PrefVal Path
*> 3.3.3.0/30 1.2.3.4 0 ?
*> 4.4.0.0/20 1.2.3.4 0 ?
*> 4.5.6.0/26 1.2.3.4 0 ?
BGP Local router ID is 1.2.3.4
Status codes: * - valid, > - best, d - damped,
h - history, i - internal, s - suppressed, S - Stale
Origin : i - IGP, e - EGP, ? - incomplete
Network NextHop MED LocPrf PrefVal Path/Ogn
*> 3.3.3.0/30 1.2.3.4 0 ?
*> 4.4.0.0/20 1.2.3.4 0 ?
*> 4.5.6.0/26 1.2.3.4 0 ?
Refer to Table 1-6 for description on the fields above.
display bgp routing-table dampened
Syntax
display bgp routing-table dampened
View
Any view
Default Level
1: Monitor level
Parameters
None
Description
Use the display bgp routing-table dampened command to display dampened BGP routes.
Examples
# Display dampened BGP routes.
<Sysname> display bgp routing-table dampened
BGP Local router ID is 2.2.2.2
Status codes: * - valid, > - best, d - damped,
h - history, i - internal, s - suppressed, S - Stale
Origin : i - IGP, e - EGP, ? - incomplete
Network From Reuse Path/Origin
*d 77.0.0.0 12.1.1.1 00:29:20 100?
Table 1-7 display bgp routing-table dampened command output description
Field |
Description |
From |
IP address from which the route was received |
Reuse |
Reuse time of the route |
Refer to Table 1-6 for description on the other fields above.
display bgp routing-table dampening parameter
Syntax
display bgp routing-table dampening parameter
View
Any view
Default Level
1: Monitor level
Parameters
None
Description
Use the display bgp routing-table dampening parameter command to display BGP route dampening parameters.
Related commands: dampening.
Examples
# Display BGP route dampening parameters.
<Sysname> display bgp routing-table dampening parameter
Maximum Suppress Time(in second) : 3069
Ceiling Value : 16000
Reuse Value : 750
Reach HalfLife Time(in second) : 900
Unreach HalfLife Time(in second): 900
Suppress-Limit : 2000
Table 1-8 display bgp routing-table dampening parameter command output description
Field |
Description |
Maximum Suppress Time |
Maximum Suppress Time |
Ceiling Value |
Ceiling penalty value |
Reuse Value |
Reuse value |
Reach HalfLife Time(in second) |
Half-life time of active routes |
Unreach HalfLife Time(in second) |
Half-life time of inactive routes |
Suppress-Limit |
Limit for a route to be suppressed |
display bgp routing-table different-origin-as
Syntax
display bgp routing-table different-origin-as
View
Any view
Default Level
1: Monitor level
Parameters
None
Description
Use the display bgp routing-table different-origin-as command to display BGP routes originating from different autonomous systems.
Examples
# Display BGP routes originating from different ASs.
<Sysname> display bgp routing-table different-origin-as
BGP Local router ID is 2.2.2.2
Status codes: * - valid, > - best, d - damped,
h - history, i - internal, s - suppressed, S - Stale
Origin : i - IGP, e - EGP, ? - incomplete
Network NextHop MED LocPrf PrefVal Path/Ogn
*> 55.0.0.0 12.1.1.1 0 0 100?
* 14.1.1.2 0 0 300?
Refer to Table 1-6 for description on the fields above.
display bgp routing-table flap-info
Syntax
display bgp routing-table flap-info [ regular-expression as-regular-expression | as-path-acl as-path-acl-number | ip-address [ { mask | mask-length } [ longer-match ] ] ]
View
Any view
Default Level
1: Monitor level
Parameters
as-regular-expression: Displays route flap information that matches the AS path regular expression, which is a string of 1 to 80 characters.
as-path-acl-number: Displays route flap information matching the AS path ACL. The number is in the range 1 to 256.
ip-address: Destination IP address.
mask: Mask, in dotted decimal notation.
mask-length: Mask length, in the range 0 to 32.
longer-match: Matches the longest prefix.
Description
Use the display bgp routing-table flap-info command to display BGP route flap statistics.
Examples
# Display BGP route flap statistics.
<Sysname> display bgp routing-table flap-info
BGP Local router ID is 2.2.2.2
Status codes: * - valid, > - best, d - damped,
h - history, i - internal, s - suppressed, S - Stale
Origin : i - IGP, e - EGP, ? - incomplete
Network From Flaps Duration Reuse Path/Origin
*> 55.0.0.0 12.1.1.1 2 00:00:16 100?
*d 77.0.0.0 12.1.1.1 5 00:34:02 00:27:08 100?
Table 1-9 display bgp routing flap-info command output description
Field |
Description |
From |
Source IP address of the route |
Flaps |
Number of routing flaps |
Duration |
Duration time of the flap route |
Reuse |
Reuse time of the route |
Refer to Table 1-6 for description on the other fields above.
display bgp routing-table label
Syntax
display bgp routing-table label
View
Any view
Default Level
1: Monitor level
Parameters
None
Description
Use the display bgp routing-table label command to display labeled BGP routing information.
Examples
# Display labeled BGP routing information.
<Sysname> display bgp routing-table label
BGP Local router ID is 6.6.6.7
Status codes: * - valid, > - best, d - damped,
h - history, i - internal, s - suppressed, S - Stale
Origin : i - IGP, e - EGP, ? - incomplete
Total Number of Routes: 2
Network NextHop In/Out Label
*> 4.4.4.4/32 127.0.0.1 3/NULL
*> 5.5.5.5/32 1.1.1.1 NULL/1024
The In/Out Label field refers to the inbound/outbound label. Refer to Table 1-6 for the description of other fields.
display bgp routing-table peer
Syntax
display bgp routing-table peer ip-address { advertised-routes | received-routes } [ network-address [ mask | mask-length ] | statistic ]
View
Any view
Default Level
1: Monitor level
Parameters
ip-address: IP address of a peer.
advertised-routes: Displays routing information advertised to the specified peer.
received-routes: Displays routing information received from the specified peer.
network-address: IP address of the destination network.
mask: Mask of the destination network, in dotted decimal notation.
mask-length: Mask length, in the range 0 to 32.
statistic: Displays route statistics.
Description
Use the display bgp routing-table peer command to display BGP routing information advertised to or received from the specified BGP peer.
Related commands: display bgp peer.
Examples
# Display BGP routing information advertised to BGP peer 20.20.20.1.
<Sysname> display bgp routing-table peer 20.20.20.1 advertised-routes
Total Number of Routes: 2
BGP Local router ID is 30.30.30.1
Status codes: * - valid, > - best, d - damped,
h - history, i - internal, s - suppressed, S - Stale
Origin : i - IGP, e - EGP, ? - incomplete
Network NextHop MED LocPrf PrefVal Path/Ogn
*> 30.30.30.0/24 0.0.0.0 0 0 i
*> 40.40.40.0/24 0.0.0.0 0 0 i
Refer to Table 1-6 for description on the fields above.
display bgp routing-table regular-expression
Syntax
display bgp routing-table regular-expression as-regular-expression
View
Any view
Default Level
1: Monitor level
Parameters
as-regular-expression: AS path regular expression, a string of 1 to 80 characters.
Description
Use the display bgp routing-table regular-expression command to display BGP routing information matching the specified AS path regular expression.
Examples
# Display BGP routing information matching AS path regular expression 300$.
<Sysname> display bgp routing-table regular-expression 300$
BGP Local router ID is 20.20.20.1
Status codes: * - valid, > - best, d - damped,
h - history, i - internal, s - suppressed, S - Stale
Origin : i - IGP, e - EGP, ? - incomplete
Network NextHop MED LocPrf PrefVal Path/Ogn
*> 40.40.40.0/24 30.30.30.1 0 0 300i
Refer to Table 1-6 for description on the fields above.
display bgp routing-table statistic
Syntax
display bgp routing-table statistic
View
Any view
Default Level
1: Monitor level
Parameters
None
Description
Use the display bgp routing-table statistic command to display BGP routing statistics.
Examples
# Display BGP routing statistics.
<Sysname> display bgp routing-table statistic
Total Number of Routes: 4
Table 1-10 display bgp routing-table statistic command output description
Field |
Description |
Total number of routes |
Total number of routes |
ebgp-interface-sensitive
Syntax
ebgp-interface-sensitive
undo ebgp-interface-sensitive
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
None
Description
Use the ebgp-interface-sensitive command to enable the clearing of EBGP session on any interface that becomes down.
Use the undo ebgp-interface-sensitive command to disable the function.
This function is enabled by default.
Examples
# In BGP view, enable the clearing of EBGP session on any interface that becomes down.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ebgp-interface-sensitive
# In BGP-VPN instance view, enable the clearing of EBGP session on any interface that becomes down (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] ebgp-interface-sensitive
filter-policy export (BGP/BGP-VPN instance view)
Syntax
filter-policy { acl-number | ip-prefix ip-prefix-name } export [ direct | isis process-id | ospf process-id | rip process-id | static ]
undo filter-policy export [ direct | isis process-id | ospf process-id | rip process-id | static ]
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
acl-number: Number of an ACL used to filter outgoing routing information, ranging from 2000 to 3999.
ip-prefix-name: Name of an IP prefix list used to filter outgoing routing information, a string of 1 to 19 characters.
direct: Filters direct routes.
isis process-id: Filters outgoing routes redistributed from an ISIS process. The ID is in the range 1 to 65535.
ospf process-id: Filters outgoing routes redistributed from the OSPF process with an ID from 1 to 65535.
rip process-id: Filters outgoing routes redistributed from a RIP process. The ID is in the range 1 to 65535.
static: Filters static routes.
If no routing protocol is specified, all outgoing routes are filtered.
Description
Use the filter-policy export command to configure the filtering of outgoing routes.
Use the undo filter-policy export command to remove the filtering.
If no routing protocol is specified, all redistributed routes are filtered when advertised.
By default, the filtering is not configured.
Examples
# In BGP view, reference ACL 2000 to filter all outgoing routes.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] filter-policy 2000 export
# In BGP-VPN instance view, reference ACL 2000 to filter all outgoing routes (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] filter-policy 2000 export
filter-policy import (BGP/BGP-VPN instance view)
Syntax
filter-policy { acl-number | ip-prefix ip-prefix-name } import
undo filter-policy import
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
acl-number: Number of an ACL used to filter incoming routing information, ranging from 2000 to 3999.
ip-prefix-name: Name of an IP prefix list used to filter incoming routing information, a string of 1 to 19 characters.
Description
Use the filter-policy import command to configure the filtering of incoming routing information.
Use the undo filter-policy import command to disable the filtering.
By default, incoming routing information is not filtered.
Examples
# In BGP view, reference ACL 2000 to filter incoming routing information.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] filter-policy 2000 import
# In BGP-VPN instance view, reference ACL 2000 to filter incoming routing information (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] filter-policy 2000 import
graceful-restart (BGP view)
Syntax
graceful-restart
undo graceful-restart
View
BGP view
Default Level
2: System level
Parameters
None
Description
Use the graceful-restart command to enable BGP Graceful Restart capability.
Use the undo graceful-restart command to disable BGP Graceful Restart capability.
By default, BGP Graceful Restart capability is disabled.
During main and backup boards switchover, a GR-capable BGP speaker can maintain the packet forwarding table. During restart, it may not maintain the forwarding table.
Examples
# Enable the Graceful Restart capability for BGP process 100.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] graceful-restart
graceful-restart timer restart
Syntax
graceful-restart timer restart timer
undo graceful-restart timer restart
View
BGP view
Default Level
2: System level
Parameters
timer: Maximum time for a peer to reestablish a BGP session, in the range 3 to 600 seconds.
Description
Use the graceful-restart timer restart command to configure the maximum time for a peer to reestablish a BGP session.
Use the undo graceful-restart timer restart command to restore the default.
By default, the maximum time for a peer to reestablish a BGP session is 150 seconds.
Examples
# Configure the maximum time for a peer to reestablish a BGP session as 300 seconds.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] graceful-restart timer restart 300
graceful-restart timer wait-for-rib
Syntax
graceful-restart timer wait-for-rib timer
undo graceful-restart timer wait-for-rib
View
BGP view
Default Level
2: System level
Parameters
timer: Time to wait for the End-of-RIB marker, in the range 3 to 300 seconds.
Description
Use the graceful-restart timer wait-for-rib command to configure the time to wait for the End-of-RIB marker.
Use the undo graceful-restart timer wait-for-rib command to restore the default.
By default, the time to wait for the End-of-RIB marker is 180 seconds.
l After a BGP session has been successfully (re)established, the End-of-RIB marker must be received within the time specified with this command.
l Using this command can speed up route convergence.
Examples
# Set the time to wait for the End-of-RIB marker to 100 seconds.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] graceful-restart timer wait-for-rib 100
group (BGP/BGP-VPN instance view)
Syntax
group group-name [ external | internal ]
undo group group-name
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
external: Creates an EBGP peer group, which can be the group of another sub AS in a confederation.
internal: Creates an IBGP peer group; not supported in BGP-VPN instance view.
Description
Use the group command to create a peer group.
Use the undo group command to delete a peer group.
An IBGP peer group is created if neither internal nor external is specified.
Examples
# In BGP view, create an EBGP peer group test with AS number 200, and add EBGP peers 10.1.1.1 and 10.1.2.1 into the group.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] group test external
[Sysname-bgp] peer test as-number 200
[Sysname-bgp] peer 10.1.1.1 group test
[Sysname-bgp] peer 10.1.2.1 group test
# In BGP-VPN instance view, create an EBGP peer group test with AS number 200, and add EBGP peers 10.1.1.1 and 10.1.2.1 into the group (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] group test external
[Sysname-bgp-vpn1] peer test as-number 200
[Sysname-bgp-vpn1] peer 10.1.1.1 group test
[Sysname-bgp-vpn1] peer 10.1.2.1 group test
import-route (BGP/BGP-VPN instance view)
Syntax
import-route protocol [ process-id | all-processes ] [ med med-value | route-policy route-policy-name ] *
undo import-route protocol [ process-id | all-processes ]
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
protocol: Redistributes routes from the specified routing protocol, which can be direct, isis, ospf, rip or static at present.
process-id: Process ID, in the range 1 to 65535. The default is 1. It is available only when the protocol is isis, ospf, or rip.
all-processes: Redistributes routes from all the processes of the specified protocol. This keyword takes effect only when the protocol is rip, ospf, or isis.
med-value: Specifies a MED value for redistributed routes, ranging from 0 to 4294967295. If the argument is not specified, the cost of the redistributed route is used as its MED in the BGP routing domain.
route-policy-name: Name of a routing policy used to filter redistributed routes, a string of 1 to 19 characters.
Description
Use the import-route command to configure BGP to redistribute routes from a specified routing protocol and advertise redistributed routes.
Use the undo import-route command to disable route redistribution from a routing protocol.
By default, BGP does not redistribute routes from other protocols.
The ORIGIN attribute of routes redistributed with the import-route command is incomplete.
Examples
# In BGP view, redistribute routes from RIP.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] import-route rip
# In BGP-VPN instance view, redistribute routes from RIP (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] import-route rip
log-peer-change
Syntax
log-peer-change
undo log-peer-change
View
BGP view
Default Level
2: System level
Parameters
None
Description
Use the log-peer-change command to enable the global BGP logging on peers going up and down.
Use the undo log-peer-change command to disable the function.
By default, the function is enabled.
Examples
# Enable BGP logging on peers going up and down.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] log-peer-change
network (BGP/BGP-VPN instance view)
Syntax
network ip-address [ mask | mask-length ] route-policy route-policy-name
undo network ip-address [ mask | mask-length ]
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
ip-address: Destination IP address.
mask: Mask of the network address, in dotted decimal notation.
mask-length: Mask length, in the range 0 to 32.
route-policy-name: Routing policy applied to the route. The name is a string of 1 to 19 characters.
Description
Use the network command to inject a network to the local BGP routing table.
Use the undo network command to remove a network from the BGP routing table.
By default, no network route is injected.
Note that:
l The network route to be injected must exist in the local IP routing table, and using a routing policy makes route management more flexible.
l The ORIGIN attribute of the network route injected with the network command is IGP.
Examples
# In BGP view, inject the network segment 10.0.0.0/16.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] network 10.0.0.0 255.255.0.0
# In BGP-VPN instance view, advertise the network segment 10.0.0.0/16 (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] network 10.0.0.0 255.255.0.0
network short-cut (BGP/BGP-VPN instance view)
Syntax
network ip-address [ mask | mask-length ] short-cut
undo network ip-address [ mask | mask-length ] short-cut
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
ip-address: Destination IP address.
mask: Mask of the network address, in dotted decimal notation.
mask-length: Mask length, in the range 0 to 32.
Description
Use the network short-cut command to configure an eBGP route as a shortcut route.
Use the undo network short-cut command to restore the default.
By default, a received eBGP route has a priority of 255.
The network short-cut command allows you configure an eBGP route as a shortcut route that has the same priority as a local route and thus has greater likehood to become the optimal route.
Examples
# In BGP view, configure route 10.0.0.0/16 as a shortcut route.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] network 10.0.0.0 255.255.0.0 short-cut
# In BGP-VPN instance view, configure route 10.0.0.0/16 as a shortcut route. (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] network 10.0.0.0 255.255.0.0 short-cut
peer advertise-community (BGP/BGP-VPN instance view)
Syntax
peer { group-name | ip-address } advertise-community
undo peer { group-name | ip-address } advertise-community
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
ip-address: IP address of a peer.
Description
Use the peer advertise-community command to advertise the community attribute to a peer/peer group.
Use the undo peer advertise-community command to disable the community attribute advertisement to a peer/peer group.
By default, no community attribute is advertised to any peer group/peer.
Related commands: ip community-list, if-match community, apply community (refer to Routing Policy Commands in the IP Routing Volume).
Examples
# In BGP view, advertise the community attribute to peer group test.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer test advertise-community
# In BGP-VPN instance view, advertise the community attribute to peer group test (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer test advertise-community
peer advertise-ext-community (BGP/BGP-VPN instance view)
Syntax
peer { group-name | ip-address } advertise-ext-community
undo peer { group-name | ip-address } advertise-ext-community
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
ip-address: IP address of a peer.
Description
Use the peer advertise-ext-community command to advertise the extended community attribute to a peer/peer group.
Use the undo peer advertise-ext-community command to disable the extended community attribute advertisement to a peer/peer group.
By default, no extended community attribute is advertised to a peer/peer group.
For related information, refer to the ip extcommunity-list, if-match extcommunity and apply extcommunity commands in Routing Policy Commands of the IP Routing Volume.
Examples
# In BGP view, advertise the extended community attribute to the peer group test.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer test advertise-ext-community
# In BGP-VPN view, advertise the extended community attribute to the peer group test (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer test advertise-community
peer allow-as-loop (BGP/BGP-VPN instance view)
Syntax
peer { group-name | ip-address } allow-as-loop [ number ]
undo peer { group-name | ip-address } allow-as-loop
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
ip-address: IP address of a peer.
number: Specifies the number of times for which the local AS number can appear in routes from the peer/peer group, in the range 1 to 10. The default number is 1.
Description
Use the peer allow-as-loop command to allow the local AS number to exist in the AS_PATH attribute of routes from a peer/peer group, and to configure the number of times the local AS number can appear.
Use the undo peer allow-as-loop command to remove the configuration.
By default, the local AS number is not allowed in routes from a peer/peer group.
Related commands: display bgp routing-table peer.
Examples
# In BGP view, configure the number of times the local AS number can appear in AS-path attribute of routes from peer 1.1.1.1 as 2.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer 1.1.1.1 allow-as-loop 2
# In BGP-VPN instance view, configure the number of times for which the local AS number can appear in AS-path attribute of routes from peer 1.1.1.1 as 2 (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer 1.1.1.1 allow-as-loop 2
peer as-number (BGP/BGP-VPN instance view)
Syntax
peer { group-name | ip-address } as-number as-number
undo peer group-name as-number
undo peer ip-address
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
ip-address: IP address of a peer.
as-number: AS number of the peer or peer group, in the range 1 to 65535.
Description
Use the peer as-number command to specify a peer/peer group with an AS number.
Use the undo peer as-number command to delete a peer group.
Use the undo peer command to delete a peer.
By default, no peer or peer group is specified.
You can specify the AS number of a peer in either of the following two ways:
l Use the peer ip-address as-number as-number command. After that, the system creates the specified peer by default.
l Specify the AS number of the peer when adding it to the specified peer group by using the peer ip-address group group-name as-number as-number command; or use the peer as-number command to specify the AS number of a peer group, and then a newly added peer will belong to the AS.
The AS number of a peer/peer group cannot be modified directly. To do so, you have to delete the peer/peer group and configure it again.
Examples
# In BGP view, specify peer group test in AS 100.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer test as-number 100
# In BGP-VPN instance view, specify peer group test2 in AS 200 (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer test2 as-number 200
peer as-path-acl (BGP/BGP-VPN instance view)
Syntax
peer { group-name | ip-address } as-path-acl as-path-acl-number { export | import }
undo peer { group-name | ip-address } as-path-acl as-path-acl-number { export | import }
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
ip-address: IP address of a peer.
as-path-acl-number: AS path ACL number, in the range 1 to 256.
export: Filters outgoing routes.
import: Filters incoming routes.
Description
Use the peer as-path-acl command to configure the filtering of routes incoming from or outgoing to a peer/peer group based on a specified AS path ACL.
Use the undo peer as-path-acl command to remove the configuration.
By default, no AS path ACL filtering is configured.
Related commands: ip as-path, if-match as-path and apply as-path (refer to IP Routing Policy Commands in the IP Routing Volume).
Examples
# In BGP view, reference the AS path ACL 1 to filter routes outgoing to the peer group test.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer test as-path-acl 1 export
# In BGP-VPN instance view, reference the AS path ACL 1 to filter routes outgoing to the peer group test (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer test as-path-acl 1 export
peer capability-advertise conventional
Syntax
peer { group-name | ip-address } capability-advertise conventional
undo peer { group-name | ip-address } capability-advertise conventional
View
BGP view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
ip-address: IP address of a peer.
Description
Use the peer capability-advertise conventional command to disable BGP multi-protocol extension and route refresh for a peer/peer group.
Use the undo peer capability-advertise command to enable BGP multi-protocol extension and route refresh for a peer/peer group.
By default, BGP multi-protocol extension and route refresh are enabled.
Examples
# In BGP view, disable multi-protocol extension and route refresh for peer 160.89.2.33.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer 160.89.2.33 as-number 100
[Sysname-bgp] peer 160.89.2.33 capability-advertise conventional
peer capability-advertise route-refresh
Syntax
peer { group-name | ip-address } capability-advertise route-refresh
undo peer { group-name | ip-address } capability-advertise route-refresh
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
ip-address: IP address of a peer.
Description
Use the peer capability-advertise route-refresh command to enable the BGP route refresh capability.
Use the undo peer capability-advertise route-refresh command to disable the capability.
The capability is enabled by default.
Examples
# In BGP view, enable BGP route refresh for peer 160.89.2.33.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer 160.89.2.33 as-number 100
[Sysname-bgp] peer 160.89.2.33 capability-advertise route-refresh
# In BGP-VPN instance view, enable BGP route refresh for peer 160.89.2.33 (The VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer 160.89.2.33 as-number 200
[Sysname-bgp-vpn1] peer 160.89.2.33 capability-advertise route-refresh
peer connect-interface (BGP/BGP-VPN instance view)
Syntax
peer { group-name | ip-address } connect-interface interface-type interface-number
undo peer { group-name | ip-address } connect-interface
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string 1 to 47 characters.
ip-address: IP address of a peer.
interface-type interface-number: Specifies the type and number of the interface.
Description
Use the peer connect-interface command to specify the source interface for establishing TCP connections to a peer/peer group.
Use the undo peer connect-interface command to restore the default.
By default, BGP uses the outbound interface of the best route to the BGP peer/peer group as the source interface for establishing a TCP connection to the peer/peer group.
Note that:
To establish multiple BGP connections to another BGP router, you need to specify on the local router the respective source interfaces for establishing TCP connections to the peers on the peering BGP router; otherwise, the local BGP router may fail to establish TCP connections to the peers when using the outbound interfaces of the best routes as the source interfaces.
Examples
# In BGP view, specify loopback 0 as the source interface for routing updates to the peer group test.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer test connect-interface loopback 0
# In BGP-VPN instance view, specify loopback 0 as the source interface for routing updates to the peer group test (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer test connect-interface loopback 0
peer default-route-advertise (BGP/BGP-VPN instance view)
Syntax
peer { group-name | ip-address } default-route-advertise [ route-policy route-policy-name ]
undo peer { group-name | ip-address } default-route-advertise
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
ip-address: IP address of a peer.
route-policy-name: Routing policy name, a string of 1 to 19 characters.
Description
Use the peer default-route-advertise command to advertise a default route to a peer/peer group.
Use the undo peer default-route-advertise command to disable default route advertisement to a peer/peer group.
By default, no default route is advertised to a peer/peer group.
With this command used, the router unconditionally sends a default route with the next hop being itself to the peer/peer group regardless of whether the default route is available in the routing table.
Examples
# In BGP view, advertise a default route to peer group test.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer test default-route-advertise
# In BGP-VPN instance view, advertise a default route to peer group test (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer test default-route-advertise
peer description (BGP/BGP-VPN instance view)
Syntax
peer { group-name | ip-address } description description-text
undo peer { group-name | ip-address } description
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
ip-address: IP address of a peer.
description-text: Description information for the peer/peer group, a string of 1 to 79 characters.
Description
Use the peer description command to configure the description information for a peer/peer group.
Use the undo peer description command to remove the description information of a peer/peer group.
By default, no description information is configured for a peer/peer group.
Create a peer/peer group before configuring a description for it.
Related commands: display bgp peer.
Examples
# In BGP view, configure the description information of the peer group test as ISP1.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer test description ISP1
# In BGP-VPN instance view, configure the description information of the peer group test as ISP1(the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer test description ISP1
peer ebgp-max-hop (BGP/BGP-VPN instance view)
Syntax
peer { group-name | ip-address } ebgp-max-hop [ hop-count ]
undo peer { group-name | ip-address } ebgp-max-hop
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
ip-address: IP address of a peer.
hop-count: Maximum hop count, in the range 1 to 255. The default is 64.
Description
Use the peer ebgp-max-hop command to allow establishing an EBGP connection with a peer/peer group that is on an indirectly connected network.
Use the undo peer ebgp-max-hop command to restore the default.
By default, this feature is disabled.
You can use the argument hop-count to specify the maximum route hop count of the EBGP connection.
Examples
# In BGP view, allow establishing the EBGP connection with the peer group test that is on an indirectly connected network.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer test ebgp-max-hop
# In BGP-VPN instance view, allow establishing the EBGP connection with the peer group test that is on an indirectly connected network (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer test ebgp-max-hop
peer enable (BGP view)
Syntax
undo peer ip-address enable
View
BGP view
Default Level
2: System level
Parameters
ip-address: IP address of a peer.
Description
Use the peer enable command to enable the specified peer.
Use the undo peer enable command to disable the specified peer.
By default, the BGP peer is enabled.
If a peer is disabled, the router will not exchange routing information with the peer.
Examples
# Disable peer 18.10.0.9.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer 18.10.0.9 group group1
[Sysname-bgp] undo peer 18.10.0.9 enable
peer fake-as (BGP/BGP-VPN instance view)
Syntax
peer { group-name | ip-address } fake-as as-number
undo peer { group-name | ip-address } fake-as
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
ip-address: IP address of a peer.
as-number: Local autonomous system number, in the range 1 to 65535.
Description
Use the peer fake-as command to configure a fake local AS number for a peer or peer group.
Use the undo peer fake-as command to remove the configuration.
By default, no fake local AS number is configured for a peer or peer group.
The peer fake-as command is only applicable to an EBGP peer or peer group.
Examples
# In BGP view, configure a fake AS number of 200 for the peer group test.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer test fake-as 200
# In BGP-VPN instance view, configure a fake AS number of 200 for the peer group test (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer test fake-as 200
peer filter-policy (BGP/BGP-VPN instance view)
Syntax
peer { group-name | ip-address } filter-policy acl-number { export | import }
undo peer { group-name | ip-address } filter-policy [ acl-number ] { export | import }
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
ip-address: IP address of a peer.
acl-number: ACL number, in the range 2000 to 3999.
export: Applies the filter-policy to routes advertised to the peer/peer group.
import: Applies the filter-policy to routes received from the peer/peer group.
Description
Use the peer filter-policy command to configure an ACL-based filter policy for a peer or peer group.
Use the undo peer filter-policy command to remove the configuration.
By default, no ACL-based filter policy is configured for a peer or peer group.
Related commands: peer as-path-acl.
Examples
# In BGP view, apply the ACL 2000 to filter routes advertised to the peer group test.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer test filter-policy 2000 export
# In BGP-VPN instance view, apply the ACL 2000 to filter routes advertised to the peer group test (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer test filter-policy 2000 export
peer group (BGP/BGP-VPN instance view)
Syntax
peer ip-address group group-name [ as-number as-number ]
undo peer ip-address group group-name
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
ip-address: IP address of a peer.
as-number: AS number of the peer, in the range 1 to 65535.
Description
Use the peer group command to add a peer to a peer group.
Use the undo peer group command to delete a specified peer from a peer group.
By default, no peer is added into a peer group.
If you have specified an AS number for the peer to be added, make sure that the as-number argument is consistent with the specified peer AS number.
If you have not created the peer to be added, the system automatically creates the peer when you execute the command.
Examples
# In BGP view, add the peer 10.1.1.1 to the EBGP peer group test.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] group test external
[Sysname-bgp] peer test as-number 2004
[Sysname-bgp] peer 10.1.1.1 group test
# In BGP-VPN view, add the peer 10.1.1.1 to the EBGP peer group test (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] group test external
[Sysname-bgp-vpn1] peer test as-number 2004
[Sysname-bgp-vpn1] peer 10.1.1.1 group test
peer ignore (BGP/BGP-VPN instance view)
Syntax
peer { group-name | ip-address } ignore
undo peer { group-name | ip-address } ignore
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
ip-address: IP address of a peer.
Description
Use the peer ignore command to disable session establishment with a peer or peer group.
Use the undo peer ignore command to remove the configuration.
By default, session establishment with a peer or peer group is allowed.
After the peer ignore command is executed, the system disables the session with the specified peer or peer group and clears all the related routing information. For a peer group, this means all sessions with the peer group will be tore down.
Examples
# In BGP view, disable session establishment with peer 10.10.10.10.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer 10.10.10.10 ignore
# In BGP-VPN instance view, disable session establishment with peer 10.10.10.10 (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer 10.10.10.10 ignore
peer ip-prefix
Syntax
peer { group-name | ip-address } ip-prefix ip-prefix-name { export | import }
undo peer { group-name | ip-address } ip-prefix { export | import }
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
ip-address: IP address of a peer.
ip-prefix-name: IP prefix list name, a string of 1 to 19 characters.
export: Applies the filter to routes advertised to the specified peer/peer group.
import: Applies the filter to routes received from the specified peer/peer group.
Description
Use the peer ip-prefix command to reference an IP prefix list to filter routes received from or advertised to a peer or peer group.
Use the undo peer ip-prefix command to remove the configuration.
By default, no IP prefix list based filtering is configured.
Examples
# In BGP view, use the IP prefix list list 1 to filter routes advertised to the peer group test.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer test ip-prefix list1 export
# In BGP-VPN view, use the IP prefix list list 1 to filter routes advertised to the peer group test (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer test ip-prefix list1 export
peer keep-all-routes (BGP/BGP-VPN instance view)
Syntax
peer { group-name | ip-address } keep-all-routes
undo peer { group-name | ip-address } keep-all-routes
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
ip-address: IP address of a peer.
Description
Use the peer keep-all-routes command to save original routing information from a peer or peer group, including routes that fail to pass the inbound policy (if configured).
Use the undo peer keep-all-routes command to disable this function.
By default, the function is not enabled.
Examples
# In BGP view, save routing information from peer 131.100.1.1.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer 131.100.1.1 as-number 200
[Sysname-bgp] peer 131.100.1.1 keep-all-routes
# In BGP-VPN instance view, save routing information from peer 131.100.1.1(the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer 131.100.1.1 as-number 200
[Sysname-bgp-vpn1] peer 131.100.1.1 keep-all-routes
peer log-change (BGP/BGP-VPN instance view)
Syntax
peer { group-name | ip-address } log-change
undo peer { group-name | ip-address } log-change
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
ip-address: IP address of a peer.
Description
Use the peer log-change command to enable the logging of session state and event information for a specified peer or peer group.
Use the undo peer log-change command to remove the configuration.
The logging is enabled by default.
Examples
# In BGP view, enable the logging of session state and event information for peer group test.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer test log-change
# In BGP-VPN instance view, enable the logging of session state and event information for peer group test (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer test log-change
peer next-hop-local (BGP/BGP-VPN instance view)
Syntax
peer { group-name | ip-address } next-hop-local
undo peer { group-name | ip-address } next-hop-local
View
BGP view /BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
ip-address: IP address of a peer.
Description
Use the peer next-hop-local command to specify the router as the next hop for routes sent to a peer/peer group.
Use the undo peer next-hop-local command to remove the configuration.
By default, routes advertised to an EBGP peer/peer group take the local router as the next hop, while routes sent to an IBGP peer/peer group do not take the local router as the next hop.
Examples
# In BGP view, set the next hop of routes advertised to peer group test to the router itself.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer test next-hop-local
# In BGP-VPN instance view, set the next hop of routes advertised to peer group test to the router itself (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer test next-hop-local
peer password
Syntax
peer { group-name | ip-address } password { cipher | simple } password
undo peer { group-name | ip-address } password
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
ip-address: IP address of a peer.
cipher: Displays the configured password in cipher text format.
simple: Displays the configured password in plain text format.
password: Password, a string of 1 to 80 characters when the simple keyword is used, or when the cipher keyword and plain text password are used; a string of 24 or 108 characters when the cipher text password and the cipher keyword are used.
Description
Use the peer password command to configure BGP to perform MD5 authentication when a TCP connection is being established with a peer/peer group.
Use the undo peer password command to disable the function.
By default, no MD5 authentication is performed for TCP connection establishment.
Once MD5 authentication is enabled, both parties must be configured with the same authentication mode and password. Otherwise, the TCP connection will not be set up.
Examples
# In BGP view, perform MD5 authentication on the TCP connection set up between the local router 10.1.100.1 and the peer router 10.1.100.2.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer 10.1.100.2 password simple aabbcc
# Perform the similar configuration on the peer.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer 10.1.100.1 password simple aabbcc
# In BGP-VPN instance view, perform MD5 authentication on the TCP connection set up between the local router 10.1.100.1 and the peer router 10.1.100.2(the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer 10.1.100.2 password simple aabbcc
# Perform the similar configuration on the peer.
<Sysname> system-view
[Sysname] bgp 200
[Sysname-bgp-vpn1] peer 10.1.100.1 password simple aabbcc
peer preferred-value (BGP/BGP-VPN instance view)
Syntax
peer { group-name | ip-address } preferred-value value
undo peer { group-name | ip-address } preferred-value
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
ip-address: IP address of a peer.
value: Preferred value, in the range 0 to 65535.
Description
Use the peer preferred-value command to assign a preferred value to routes received from a peer or peer group.
Use the undo peer preferred-value command to restore the default value.
The default preferred value is 0.
Routes learned from a peer have an initial preferred value. Among multiple routes that have the same destination/mask and are learned from different peers, the one with the greatest preferred value is selected as the route to the destination.
Note that:
If you both reference a routing policy and use the peer { group-name | ip-address } preferred-value value command to set a preferred value for routes from a peer, the routing policy sets a specified non-zero preferred value for routes matching it. Other routes not matching the routing policy uses the value set with the command. If the preferred value specified in the routing policy is zero, the routes matching it will also use the value set with the command. For information about using a routing policy to set a preferred value, refer to the command peer { group-name | ip-address } route-policy route-policy-name { export | import } in this document, and the command apply preferred-value preferred-value in Routing Policy Commands of the IP Routing Volume.
Examples
# In BGP view, configure the preferred value as 50 for routes from peer 131.108.1.1.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer 131.108.1.1 preferred-value 50
# In BGP-VPN instance view, configure the preferred value as 50 for routes from peer 131.108.1.1 (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer 131.108.1.1 preferred-value 50
peer public-as-only (BGP/BGP-VPN instance view)
Syntax
peer { group-name | ip-address } public-as-only
undo peer { group-name | ip-address } public-as-only
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
ip-address: IP address of a peer.
Description
Use the peer public-as-only command to not keep private AS numbers in BGP updates sent to a peer/peer group.
Use the undo peer public-as-only command to keep private AS numbers in BGP updates sent to a peer/peer group.
By default, BGP updates carry private AS numbers.
The command does not take effect if the BGP update has both public and private AS numbers. The range of private AS number is from 64512 to 65535.
Examples
# In BGP view, carry no private AS number in BGP updates sent to the peer group test.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer test public-as-only
# In BGP-VPN instance view, carry no private AS number in BGP updates sent to the peer group test (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer test public-as-only
peer reflect-client (BGP/BGP-VPN instance view)
Syntax
peer { group-name | ip-address } reflect-client
undo peer { group-name | ip-address } reflect-client
View
BGP view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
ip-address: IP address of a peer.
Description
Use the peer reflect-client command to configure the router as a route reflector and specify a peer/peer group as a client.
Use the undo peer reflect-client command to remove the configuration.
By default, neither the route reflector nor the client is configured.
Related commands: reflect between-clients and reflect cluster-id.
Examples
# In BGP view, configure the local device as a route reflector and specify the IBGP peer group test as a client.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer test reflect-client
peer route-limit (BGP/BGP-VPN instance view)
Syntax
peer { group-name | ip-address } route-limit prefix-number [ { alert-only | reconnect reconnect-time } | percentage-value ] *
undo peer { group-name | ip-address } route-limit
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
ip-address: IP address of a peer.
prefix-number: Number of prefixes that can be received from the peer or peer group, in the range 1 to 128000. If the number of prefixes received from the peer/peer group reaches the prefix-number, the router will tear down the connection to the peer/peer group.
alert-only: If the number of prefixes received from the peer/peer group reaches the prefix-number, the router will not tear down the connection to the peer/peer group but display an alarm message.
reconnect reconnect-time: Specifies a reconnect time, after which, the router will re-establish a connection to the peer/peer group. It has no default value and is in the range 1 to 65535 seconds.
percentage-value: Threshold value for the router to display an alarm message (that is, the router displays an alarm message when the ratio of the number of received prefixes to the prefix-number reaches the percentage). It is in the range 1 to 100 and defaults to 75.
Description
Use the peer route-limit command to set the number of route prefixes that can be received from a peer/peer group.
Use the undo peer route-limit command to restore the default.
The number is not limited by default.
Examples
# In BGP view, set the number of route prefixes that can be received from peer 129.140.6.6 to 10000.
<Sysname> system-view
[Sysname] bgp 109
[Sysname-bgp] peer 129.140.6.6 as-number 110
[Sysname-bgp] peer 129.140.6.6 route-limit 10000
# In BGP-VPN instance view, set the number of route prefixes that can be received from peer 129.140.6.6 to 10000 (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 109
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer 129.140.6.6 as-number 110
[Sysname-bgp-vpn1] peer 129.140.6.6 route-limit 10000
peer route-policy (BGP/BGP-VPN instance view)
Syntax
peer { group-name | ip-address } route-policy route-policy-name { export | import }
undo peer { group-name | ip-address } route-policy route-policy-name { export | import }
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
ip-address: IP address of a peer.
route-policy-name: Routing policy name, a string of 1 to 19 characters.
export: Applies the routing policy to routes outgoing to the peer (or peer group).
import: Applies the routing policy to routes incoming from the peer (or peer group).
Description
Use the peer route-policy command to apply a routing policy to routes incoming from or outgoing to a peer or peer group.
Use the undo peer route-policy command to remove the configuration.
By default, no routing policy is applied to routes from/to the peer/peer group.
The peer route-policy command does not apply the if-match interface clause in the referenced routing policy. Refer to Routing Policy Commands in the IP Routing Volume for related commands.
Examples
# In BGP view, apply routing policy test-policy to routes outgoing to the peer group test.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer test route-policy test-policy export
# In BGP-VPN instance view, apply the routing policy test-policy to routes outgoing to the peer group test (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer test route-policy test-policy export
peer route-update-interval (BGP/BGP-VPN instance view)
Syntax
peer { group-name | ip-address } route-update-interval interval
undo peer { group-name | ip-address } route-update-interval
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a sting of 1 to 47 characters.
ip-address: IP address of a peer.
interval: Minimum interval for sending the same update message. The range is 5 to 600 seconds.
Description
Use the peer route-update-interval command to specify the interval for sending the same update to a peer/peer group.
Use the undo peer route-update-interval command to restore the default value.
By default, the interval is 15 seconds for IBGP peers, and 30 seconds for EBGP peers.
Examples
# In BGP view, specify the interval for sending the same update to peer group test as 10 seconds.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer test as-number 100
[Sysname-bgp] peer test route-update-interval 10
# In BGP-VPN instance view, specify the interval for sending the same update to peer group test as 10 seconds (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer test as-number 100
[Sysname-bgp-vpn1] peer test route-update-interval 10
peer substitute-as (BGP/BGP-VPN instance view)
Syntax
peer { group-name | ip-address } substitute-as
undo peer { group-name | ip-address } substitute-as
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a sting of 1 to 47 characters.
ip-address: IP address of a peer.
Description
Use the peer substitute-as command to replace the AS number of a peer/peer group in the AS_PATH attribute with the local AS number.
Use the undo peer substitute-as command to remove the configuration.
No AS number is replaced by default.
Examples
# In BGP view, substitute local AS number for AS number of peer 1.1.1.1.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer 1.1.1.1 substitute-as
# In BGP-VPN instance view, substitute local AS number for AS number of peer 1.1.1.1 (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer 1.1.1.1 substitute-as
peer timer (BGP/BGP-VPN instance view)
Syntax
peer { group-name | ip-address } timer keepalive keepalive hold holdtime
undo peer { group-name | ip-address } timer
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a sting of 1 to 47 characters.
ip-address: IP address of a peer.
keepalive: Keepalive interval in seconds, ranging from 1 to 21845.
holdtime: Holdtime interval in seconds, ranging from 3 to 65535.
Description
Use the undo peer timer command to restore the default.
By default, the keepalive and holdtime are 60s and 180s respectively.
Note that:
l The timer configured with this command is preferred to the timer configured with the timer command.
l The holdtime interval must be at least three times the keepalive interval.
Related commands: timer.
Examples
# In BGP view, configure the keepalive interval and holdtime interval for peer group test as 60s and 180s.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] peer test timer keepalive 60 hold 180
# In BGP-VPN instance view, configure the keepalive interval and holdtime interval for peer group test as 60s and 180s (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] peer test timer keepalive 60 hold 180
preference (BGP/BGP-VPN instance view)
Syntax
preference { external-preference internal-preference local-preference | route-policy route-policy-name }
undo preference
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
external-preference: Preference of EBGP routes, in the range 1 to 255.
internal-preference: Preference of IBGP routes, in the range 1 to 255.
local-preference: Preference of local routes, in the range 1 to 255.
route-policy-name: Routing policy name, a string of 1 to 19 characters. Using the routing policy can set a preference for routes matching it. The default value applies to routes not matching the routing policy.
Description
Use the preference command to configure preferences for external, internal, and local routes.
Use the undo preference command to restore the default.
For external-preference, internal-preference and local-preference, the greater the preference value is, the lower the preference is, and the default values are 255, 255, 130 respectively.
Examples
# In BGP view, configure preferences for EBGP, IBGP and local routes as 20, 20 and 200.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] preference 20 20 200
# In BGP-VPN instance view, configure preferences for EBGP, IBGP and local routes as 20, 20 and 200 (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] preference 20 20 200
reflect between-clients (BGP view)
Syntax
reflect between-clients
undo reflect between-clients
View
BGP view
Default Level
2: System level
Parameters
None
Description
Use the reflect between-clients command to enable route reflection between clients.
Use the undo reflect between-clients command to disable this function.
By default, route reflection between clients is enabled.
After a route reflector is configured, it reflects the routes of a client to other clients. If the clients of a route reflector are fully meshed, you need disable route reflection between clients to reduce routing costs.
Related commands: reflector cluster-id and peer reflect-client.
Examples
# Disable route reflection between clients.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] undo reflect between-clients
reflector cluster-id (BGP view)
Syntax
reflector cluster-id { cluster-id | ip-address }
undo reflector cluster-id
View
BGP view
Default Level
2: System level
Parameters
cluster-id: Cluster ID in the format of an integer from 1 to 4294967295.
ip-address: Cluster ID in the format of an IPv4 address in dotted decimal notation.
Description
Use the reflector cluster-id command to configure the cluster ID of the route reflector.
Use the undo reflector cluster-id command to remove the configured cluster ID.
By default, each route reflector uses its router ID as the cluster ID.
Usually, there is only one route reflector in a cluster. The router ID of the route reflector is the ID of the cluster. You can configure multiple route reflectors to improve network stability. In this case, using this command can configure the identical cluster ID for all the route reflectors to avoid routing loops.
Related commands: reflect between-clients and peer reflect-client.
Examples
# Set the cluster ID to 80.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] reflector cluster-id 80
refresh bgp
Syntax
refresh bgp { all | ip-address | group group-name | external | internal } { export | import }
View
User view
Default Level
1: Monitor level
Parameters
all: Soft-resets all BGP connections.
ip-address: Soft-resets the BGP connection to a peer.
group-name: Soft-resets connections to a peer group, name of which is a sting of 1 to 47 characters.
external: EBGP connection.
internal: IBGP connection.
export: Outbound soft reset.
import: Inbound soft reset.
Description
Use the refresh bgp command to perform soft reset on specified BGP connections. Using this function can refresh the BGP routing table without tearing down BGP connections and apply a newly configured routing policy.
To perform BGP soft reset, all routers in the network must support route-refresh. If a router not supporting route-refresh exists in the network, you need to configure the peer keep-all-routes command to save all routing updates before performing soft reset.
Examples
# Perform inbound BGP soft reset.
<Sysname> refresh bgp all import
reset bgp
Syntax
reset bgp { all | as-number | ip-address [ flap-info ] | group group-name | external | internal }
View
User view
Default Level
1: Monitor level
Parameters
all: Resets all BGP connections.
as-number: Resets BGP connections to peers in the AS.
ip-address: Specifies the IP address of a peer with which to reset the connection.
flap-info: Clears routing flap information.
group group-name: Resets connections with the specified BGP peer group.
external: Resets all the EBGP connections.
internal: Resets all the IBGP connections.
Description
Use the reset bgp command to reset specified BGP connections.
Examples
# Reset all the BGP connections.
<Sysname> reset bgp all
reset bgp dampening
Syntax
reset bgp dampening [ ip-address [ mask | mask-length ] ]
View
User view
Default Level
1: Monitor level
Parameters
ip-address: Destination IP address of a route.
mask: Mask, in dotted decimal notation.
mask-length: Mask length, in the range 0 to 32.
Description
Use the reset bgp dampening command to clear route dampening information and release suppressed routes.
Related commands: dampening, display bgp routing-table dampened.
Examples
# Clear damping information of route 20.1.0.0/16 and release the suppressed route.
<Sysname> reset bgp dampening 20.1.0.0 255.255.0.0
reset bgp flap-info
Syntax
reset bgp flap-info [ regexp as-path-regular-expression | as-path-acl as-path-acl-number | ip-address [ mask | mask-length ] ]
View
User view
Default Level
1: Monitor level
Parameters
as-path-regular-expression: Clears the flap statistics of routes matching the AS path regular expression, which is a string of 1 to 80 characters.
as-path-acl-number: Clears the flap statistics of routes matching an AS path ACL, number of which is in the range 1 to 256.
ip-address: Clears the flap statistics of a route.
mask: Network mask, in dotted decimal notation.
mask-length: Mask length, in the range 0 to 32.
Description
Use the reset bgp flap-info command to clear the flap statistics of routes matching the specified filter.
Examples
# Clear the flap statistics of all routes matching AS path ACL 10.
<Sysname> reset bgp flap-info as-path-acl 10
reset bgp ipv4 all
Syntax
reset bgp ipv4 all
View
User view
Default Level
1: Monitor level
Parameters
None
Description
Use the reset bgp ipv4 all command to reset all the BGP connections of IPv4 unicast address family.
Examples
# Reset all the BGP connections of IPv4 unicast address family.
<Sysname> reset bgp ipv4 all
router-id
Syntax
router-id router-id
undo router-id
View
BGP view
Default Level
2: System level
Parameters
router-id: Router ID in IP address format.
Description
Use the router-id command to specify a router ID.
Use the undo router-id command to remove the router ID.
To run BGP protocol, a router must have a router ID, which is an unsigned 32-bit integer, the unique ID of the router in the AS.
You can specify a router ID manually. If not, the system selects an IP address as the router ID. The selection sequence is the highest IP address among loopback interface addresses; if not available, then the highest IP address of interfaces. It is recommended to specify a loopback interface address as the router ID to enhance network reliability.
Only when the interface with the selected Router ID or the manual Router ID is deleted will the system select another ID for the router.
Examples
# Specifies the Router ID as 10.18.4.221.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] router-id 10.18.4.221
summary automatic
Syntax
summary automatic
undo summary automatic
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
None
Description
Use the summary automatic command to enable automatic summarization for redistributed subnets.
Use the undo summary automatic command to disable automatic summarization.
By default, automatic summarization is disabled.
Note that:
l Neither the default route nor the routes imported using the network command can be summarized automatically.
l The summary automatic command helps BGP limit the number of routes redistributed from IGP to reduce the size of the routing table.
Examples
# In BGP view, enable automatic route summarization.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] summary automatic
# In BGP-VPN instance view, enable automatic summarization (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] summary automatic
synchronization (BGP view)
Syntax
synchronization
undo synchronization
View
BGP view
Default Level
2: System level
Parameters
None
Description
Use the synchronization command to enable the synchronization between the BGP and IGP routes.
Use the undo synchronization command to disable the synchronization.
The feature is disabled by default.
With this feature enabled and when a non-BGP router is responsible for forwarding packets in an AS, BGP speakers in the AS cannot advertise routing information to other ASs unless all routers in the AS know the latest routing information.
When a BGP router receives an IBGP route, it checks only whether the next hop is reachable by default. If the synchronization is enabled, the IBGP route is synchronized and advertised to EBGP peers only when the route is also advertised by IGP. Otherwise, the IBGP route cannot be advertised to EBGP peers.
Examples
# Enable the synchronization between BGP and IGP routes.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] synchronization
timer (BGP/BGP-VPN instance view)
Syntax
timer keepalive keepalive hold holdtime
undo timer
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
keepalive: Keepalive interval in seconds, ranging from 1 to 21845.
holdtime: Holdtime interval in seconds, ranging from 3 to 65535.
Description
Use the timer command to configure BGP keepalive interval and holdtime interval.
Use the undo timer command to restore the default.
By default, BGP keepalive and holdtime intervals are 60s and 180s.
Note that:
l Timer configured using the peer timer command is preferred to the timer configured using this command.
l The holdtime interval must be at least three times the keepalive interval.
l The configured timer applies to all the BGP peers, while it becomes valid only after the corresponding BGP connections are reset.
Related commands: peer timer.
Examples
# Configure keepalive interval and holdtime interval as 60s and 180s.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] timer keepalive 60 hold 180
# In BGP-VPN instance view, configure keepalive interval and holdtime interval as 60s and 180s (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] timer keepalive 60 hold 180