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- Table of Contents
-
- H3C S9500 Command Manual-Release2132[V2.03]-08 System Volume
- 00-1Cover
- 01-GR Commands
- 02-VRRP Commands
- 03-HA Commands
- 04-Device Management Commands
- 05-NQA Commands
- 06-NetStream Commands
- 07-NTP Commands
- 08-RMON Commands
- 09-SNMP Commands
- 10-File System Management Commands
- 11-System Maintaining and Debugging Commands
- 12-Basic System Configuration Commands
- 13-Information Center Commands
- 14-User Interface Commands
- 15-MAC Address Table Management Commands
- 16-PoE Commands
- 17-Clock Monitoring Commands
- Related Documents
-
| Title | Size | Download |
|---|---|---|
| 01-GR Commands | 60.58 KB |
Chapter 1 GR Configuration Commands
1.1.1 display isis graceful-restart status
1.1.2 enable link-local-signaling.
1.1.3 enable out-of-band-resynchronization
1.1.4 graceful-restart (BGP view)
1.1.5 graceful-restart (IS-IS view)
1.1.6 graceful-restart (MPLS LDP view)
1.1.7 graceful-restart (OSPF view)
1.1.9 graceful-restart interval (IS-IS view)
1.1.10 graceful-restart mpls ldp
1.1.11 graceful-restart suppress-sa
1.1.12 graceful-restart timer neighbor-liveness
1.1.13 graceful-restart timer reconnect
1.1.14 graceful-restart timer recovery
1.1.15 graceful-restart timer restart
1.1.16 graceful-restart timer wait-for-rib
1.1.17 reset ospf process graceful-restart
Chapter 1 GR Configuration Commands
1.1 GR Configuration Commands
1.1.1 display isis graceful-restart status
Syntax
display isis graceful-restart status [ level-1 | level-2 ] [ process-id | vpn-instance vpn-instance-name ]
View
Any view
Default Level
1: Monitor level
Parameters
level-1: Represents the Level-1 status of the IS-IS Graceful Restart.
level-2: Represents the Level-2 status of the IS-IS Graceful Restart.
process-id: The process ID of an IS-IS Graceful Restart.
vpn-instance vpn-instance-name: The name of a specified VPN instance, a string of 1 to 31 characters.
Description
Use the display isis graceful-restart status command to display IS-IS Graceful Restart status.
Examples
# Display IS-IS Graceful Restart status.
<Sysname> display isis graceful-restart status
Restart information for IS-IS(1)
--------------------------------------------------------------------
IS-IS(1) Level-1 Restart Status
Restart Interval: 150
SA Bit Supported
Total Number of Interfaces = 1
Restart Status: RESTARTING
Number of LSPs Awaited: 3
T3 Timer Status:
Remaining Time: 239
T2 Timer Status:
Remaining Time: 59
IS-IS(1) Level-2 Restart Status
Restart Interval: 150
SA Bit Supported
Total Number of Interfaces = 1
Restart Status: RESTARTING
Number of LSPs Awaited: 3
T3 Timer Status:
Remaining Time: 239
T2 Timer Status:
Remaining Time: 59
Table 1-1 display isis graceful-restart status command output description
|
Field |
Description |
|
Restart Interval |
Indicates the Graceful Restart interval |
|
SA Bit Supported |
Indicates whether SA is supported |
|
Total Number of Interfaces |
Number of the currently used IS-IS interfaces |
|
Restart Status |
The Graceful Restart status of the current device |
|
T3 Timer Status |
The remaining time to the timeout of T3 timer |
|
T2 Timer Status |
The remaining time to the timeout of T2 timer |
1.1.2 enable link-local-signaling
Syntax
enable link-local-signaling
undo enable link-local-signaling
View
OSPF view
Default Level
2: System level
Parameters
None
Description
Use the enable link-local-signaling command to enable the use of the Link-Local Signaling (LLC) in originated OSPF packets.
Use the undo enable link-local-signaling command to disable the use of Link-Local Signaling in originated OSPF packets.
By default, the use of the Link-Local Signaling for OSPF is disabled.
Examples
# Enable the Link-Local Signaling for OSPF process 1.
<Sysname> system-view
[Sysname] ospf 1
[Sysname-ospf-1] enable link-local-signaling
1.1.3 enable out-of-band-resynchronization
Syntax
enable out-of-band-resynchronization
undo enable out-of-band-resynchronization
View
OSPF view
Default Level
2: System level
Parameters
None
Description
Use the enable out-of-band-resynchronization command to enable the use of out-of-band resynchronization (OOB-Resynch) in originated OSPF packets.
Use the undo enable out-of-band-resynchronization command to disable the use of out-of-band resynchronization in originated OSPF packets.
By default, the use of out-of-band resynchronization is disabled.
& Note:
Enable the OSPF link-local signaling before enabling OSPF out-of-band resynchronization. Refer to the enable link-local-signaling command for enabling link-local signaling of OSPF.
Examples
# Enable the out-of-band resynchronization for OSPF process 1.
<Sysname> system-view
[Sysname] ospf 1
[Sysname-ospf-1] enable link-local-signaling
[Sysname-ospf-1] enable out-of-band-resynchronization
1.1.4 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.
& Note:
A GR Restarter can still maintain its forwarding state in the address family it belongs and sends the End-of-RIB marker during execution of the graceful-restart command. However, during restart, the GR Restarter does not necessarily maintain its forwarding state.
Examples
# Enable Graceful Restart for BGP process 100.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] graceful-restart
1.1.5 graceful-restart (IS-IS view)
Syntax
graceful-restart
undo graceful-restart
View
IS-IS view
Default Level
2: System level
Parameters
None
Description
Use the graceful-restart command to enable IS-IS Graceful Restart Capability.
Use the undo graceful-restart command to disable IS-IS Graceful Restart Capability.
By default, IS-IS Graceful Restart Capability is disabled.
Examples
# Enable the Graceful Restart Capability for IS-IS process 1.
<Sysname> system-view
[Sysname] isis 1
[Sysname-isis-1] graceful-restart
1.1.6 graceful-restart (MPLS LDP view)
Syntax
graceful-restart
undo graceful-restart
View
MPLS LDP view
Default Level
1: Monitor level
Parameters
None
Description
Use the graceful-restart command to enable LDP Graceful Restart Capability.
Use the undo graceful-restart command to disable LDP Graceful Restart Capability.
By default, LDP Graceful Restart Capability is disabled.
Note that:
l Enabling or disabling Graceful Restart may remove or reestablish all the LDP sessions and instances. As a result the associated LSPs will be removed and need to be rebuilt.
l Before you can enable MPLS LDP Graceful Restart, you need to enable MPLS globally. For information about enabling MPLS, refer to MPLS Basics Configuration in the MPLS VPN Volume.
Examples
# Enable LDP Graceful Restart Capability.
<Sysname> system-view
[Sysname] mpls lsr-id 1.1.1.1
[Sysname] mpls
[Sysname-mpls] quit
[Sysname] mpls ldp
[Sysname-mpls-ldp] graceful-restart
1.1.7 graceful-restart (OSPF view)
Syntax
graceful-restart
undo graceful-restart
View
OSPF view
Default Level
2: System level
Parameters
None
Description
Use the graceful-restart command to enable OSPF Graceful Restart Capability.
Use the undo graceful-restart command to disable OSPF Graceful Restart Capability.
By default, OSPF Graceful Restart Capability is disabled.
Note that:
Before enabling GR Capability for OSPF, enable OSPF LLS (link local signaling) and OOB (out of band resynchronization) first.
Related commands: enable link-local-signaling, enable out-of-band-resynchronization.
Examples
# Enable Graceful Restart for OSPF process 1.
<Sysname> system-view
[Sysname] ospf 1
[Sysname-ospf-1] enable link-local-signaling
[Sysname-ospf-1] enable out-of-band-resynchronization
[Sysname-ospf-1] graceful-restart
1.1.8 graceful-restart help
Syntax
graceful-restart help { acl-number | prefix prefix-list }
View
OSPF view
Default Level
2: System level
Parameters
acl-number: The basic or advanced ACL number.
prefix prefix-list: The name of the specified address prefix list, in the range of 1 to 19 characters.
Description
Use the graceful-restart help command to configure for which OSPF neighbors the current device can serve as a GR Helper. (The routers can be specified by the ACL or the IP Prefix list.)
By default, the device can serve as a GR Helper for any OSPF neighbor.
Note that:
Before executing this command, enable OSPF LLS (link local signaling) and OOB (out of band resynchronization) first.
Related commands: enable link-local-signaling, enable out-of-band-resynchronization.
Examples
# Configure OSPF 1 to act as a GR Helper for OSPF neighbors defined in the ACL 2001 (supposing ACL 2001 has already existed).
<Sysname> system-view
[Sysname] ospf 1
[Sysname-ospf-1] enable link-local-signaling
[Sysname-ospf-1] enable out-of-band-resynchronization
[Sysname-ospf-1] graceful-restart help 2001
1.1.9 graceful-restart interval (IS-IS view)
Syntax
graceful-restart interval interval-value
undo graceful-restart interval
View
IS-IS view
Default Level
2: System level
Parameters
interval-value: Specifies the Graceful Restart interval ( the expected Graceful Restart interval), in seconds.
Description
Use the graceful-restart interval command to configure the Graceful Restart interval. Use the undo graceful-restart interval command to restore the default Graceful Restart interval.
By default, the Graceful Restart interval is set to 300 seconds.
Examples
# Configure the Graceful Restart interval for IS-IS process 1 to be 120 seconds.
<Sysname> system-view
[Sysname] isis 1
[Sysname-isis-1] graceful-restart interval 120
1.1.10 graceful-restart mpls ldp
Syntax
graceful-restart mpls ldp
View
User view
Default Level
1: Monitor level
Parameters
None
Description
Use the graceful-restart mpls ldp command to gracefully restart MPLS LDP.
Note that:
l This command is used to test MPLS LDP GR in case main/backup failover is not needed. In normal cases, do not use this command.
l Enable MPLS LDP GR capability before executing this command.
Related commands: graceful-restart (MPLS LDP view).
Examples
# Gracefully restart MPLS LDP.
<Sysname> graceful-restart mpls ldp
1.1.11 graceful-restart suppress-sa
Syntax
graceful-restart suppress-sa
undo graceful-restart suppress-sa
View
IS-IS view
Default Level
2: System level
Parameters
None
Description
Use the graceful-restart suppress-sa command to set the SA (Suppress-Advertisement) bit during restart.
Use the undo graceful-restart suppress-sa command to clear the SA bit.
By default, the SA bit is cleared during restart.
Note that:
l For a switch that has restarted its routing protocol, copies of LSPs generated by this router during the previous operation may still exist in the LSP databases of other switches in the network.
l Copies of LSPs in the LSP databases in other switches which may look “newer” than LSPs generated by the restarting switch after it initializes LSP fragment sequence numbers. This may result in temporary blackholes until new LSPs are regenerated and copies of them are flooded using higher sequence numbers upon completion of the restarting process.
l These blackholes can be avoided if the neighbors of the restarting switch suppress advertising the adjacency relationship with the restarting switch until the latter has flooded its latest LSPs.
Examples
# Set the SA bit in Graceful Restart.
<Sysname> system-view
[Sysname] isis 1
[Sysname-isis-1] graceful-restart suppress-sa
1.1.12 graceful-restart timer neighbor-liveness
Syntax
graceful-restart timer neighbor-liveness timer
undo graceful-restart timer neighbor-liveness
View
MPLS LDP view
Default Level
1: Monitor level
Parameters
timer: Specifies the LDP Neighbor Liveness Timer, in seconds.
Description
Use the graceful-restart timer neighbor-liveness command to configure the LDP Neighbor Liveness Timer.
Use the undo graceful-restart timer neighbor-liveness command to restore the default.
By default, the LDP Neighbor Liveness Timer is 120 seconds.
Note that:
l To modify the Neighbor Liveness Timer may cause the reestablishment of the original session. As a result, the LSP based on this session will be removed and needs to be rebuilt.
l If the LDP session is configured with MD5 authentication, you need to prolong the LDP Neighbor Liveness Timer to guarantee the TCP reestablishment. You are recommended to configure this timer as 180 seconds.
Examples
# Configure the LDP Neighbor Liveness Timer as 100 seconds.
<Sysname> system-view
[Sysname] mpls ldp
[Sysname-mpls-ldp] graceful-restart timer neighbor-liveness 100
1.1.13 graceful-restart timer reconnect
Syntax
graceful-restart timer reconnect timer
undo graceful-restart timer reconnect
View
MPLS LDP view
Default Level
1: Monitor level
Parameters
timer: Specifies the value of the FT Reconnect Timer, in seconds.
Description
Use the graceful-restart timer reconnect command to configure the FT Reconnect Time.
Use the undo graceful-restart timer reconnect command to restore the default FT Reconnect Time.
By default, the FT Reconnect Time is 300 seconds.
& Note:
l FT Reconnect Time defines the maximum time that the Stale label status will be preserved by the LSR after the TCP connection failure.
l To modify the FT Reconnect Time may cause the reestablishment of the original session. As a result, the LSP based on this session will be removed and needs to be rebuilt.
Examples
# Configure the FT Reconnect Time as 100 seconds.
<Sysname> system-view
[Sysname] mpls ldp
[Sysname-mpls-ldp] graceful-restart timer reconnect 100
1.1.14 graceful-restart timer recovery
Syntax
graceful-restart timer recovery timer
undo graceful-restart timer recovery
View
MPLS LDP view
Default Level
1: Monitor level
Parameters
timer: Specifies the value of the LDP Recovery Timer in seconds.
Description
Use the graceful-restart timer recovery command to configure the maximum Recovery Time.
Use the undo graceful-restart timer recovery command to restore the default Recovery Time.
By default, the LDP Recovery Time is 300 seconds.
& Note:
l Recovery time defines the maximum time that the Stale label state will be kept by LSR after a TCP reconnection.
l To modify the Recovery time may cause the reestablishment of the original session. As a result, the LSP based on this session will be removed and needs to be rebuilt.
Examples
# Configure the Recovery time as 45 seconds.
<Sysname> system-view
[Sysname] mpls ldp
[Sysname-mpls-ldp] graceful-restart timer recovery 45
1.1.15 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: Specifies the time taken to reestablish a session between the GR Restarter and the GR Helper, in seconds.
Description
Use the graceful-restart timer restart command to configure the maximum time taken by the peers to reestablish a BGP session.
Use the undo graceful-restart timer restart command to restore the default.
By default, the maximum time taken by the peers to reestablish a BGP session is 150 seconds.
Examples
# Configure the maximum time taken by the peers to reestablish a BGP session as 300 seconds.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] graceful-restart timer restart 300
1.1.16 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: Specifies the time to wait for the End-of-RIB, in seconds.
Description
Use the graceful-restart timer wait-for-rib command to configure the time to wait for the End-of-RIB.
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 is 180 seconds.
& Note:
l After a BGP session has been successfully (re)established, the End-of-RIB marker will be received in the time specified by this command.
l It is intended to speed up route convergence.
Examples
# Configure the time to wait for the End-of-RIB as 100 seconds.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] graceful-restart timer wait-for-rib 100
1.1.17 reset ospf process graceful-restart
Syntax
reset ospf [ process-id ] process graceful-restart
View
User view
Default Level
2: System level
Parameters
process-id: Specifies OSPF process ID.
Description
Use the reset ospf process graceful-restart command to restart an OSPF GR process with a specified ID.
Examples
# Restart OSPF process 100 to trigger GR.
<Sysname> reset ospf 100 process graceful-restart
