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- Table of Contents
-
- 05-Layer 3 - IP Services Command Reference
- 00-Preface
- 01-ARP Commands
- 02-IP Addressing Commands
- 03-DHCP Commands
- 04-DNS Commands
- 05-NAT Commands
- 06-IP Performance Optimization Commands
- 07-Adjacency Table Commands
- 08-UDP Helper Commands
- 09-IPv6 Basics Commands
- 10-DHCPv6 Commands
- 11-IPv6 DNS Commands
- 12-NAT-PT Commands
- 13-Tunneling Commands
- 14-GRE Commands
- Related Documents
-
| Title | Size | Download |
|---|---|---|
| 01-ARP Commands | 110.38 KB |
Contents
Gratuitous ARP configuration commands
gratuitous-arp-learning enable
Proxy ARP configuration commands
arp check enable
Syntax
arp check enable
undo arp check enable
View
System view
Default level
2: System level
Parameters
None
Description
Use the arp check enable command to enable dynamic ARP entry check.
Use the undo arp check enable command to disable dynamic ARP entry check.
By default, dynamic ARP entry check is enabled.
Examples
# Enable dynamic ARP entry check.
<Sysname> system-view
[Sysname] arp check enable
arp max-learning-num
Syntax
arp max-learning-num number
undo arp max-learning-num
View
Ethernet interface view, VLAN interface view, Layer 2 aggregate interface view, Layer 3 aggregate interface view, Layer 3 aggregate subinterface view
Default level
2: System level
Parameters
number: Maximum number of dynamic ARP entries that an interface can learn. The value ranges from 0 to 65533 when the system works in SPE or SPC mode, and ranges from 0 to 16381 when the system works in hybrid mode. For more information about system working modes, see Fundamentals Configuration Guide.
Description
Use the arp max-learning-num command to set the maximum number of dynamic ARP entries that an interface can learn.
Use the undo arp max-learning-num command to restore the default value.
By default, an interface can learn up to 65533 ARP entries when the system works in SPE or SPC mode, and 16381 ARP entries when the system works in hybrid mode.
When the number argument is set to 0, the interface is disabled from learning dynamic ARP entries.
Examples
# Specify VLAN-interface 40 to learn up to 500 dynamic ARP entries.
<Sysname> system-view
[Sysname] interface vlan-interface 40
[Sysname-Vlan-interface40]arp max-learning-num 500
# Specify GigabitEthernet 3/1/1 to learn up to 1000 dynamic ARP entries.
<Sysname> system-view
[Sysname] interface gigabitethernet 3/1/1
[Sysname-GigabitEthernet3/1/1] arp max-learning-num 1000
# Specify Layer 2 aggregate interface bridge-aggregation 1 to learn up to 1000 dynamic ARP entries.
<Sysname> system-view
[Sysname] interface bridge-aggregation 1
[Sysname-Bridge-Aggregation1] arp max-learning-num 1000
# Specify Layer 3 aggregate interface Route-aggregation 1 to learn up to 1000 dynamic ARP entries.
<Sysname> system-view
[Sysname] interface route-aggregation 1
[Sysname-Route-Aggregation1] arp max-learning-num 1000
arp static
Syntax
arp static ip-address mac-address [ vlan-id interface-type interface-number ] [ vpn-instance vpn-instance-name ]
undo arp ip-address [ vpn-instance vpn-instance-name ]
View
System view
Default level
2: System level
Parameters
ip-address: IP address in an ARP entry.
mac-address: MAC address in an ARP entry, in the format H-H-H.
vlan-id: ID of a VLAN to which a static ARP entry belongs to, in the range of 1 to 4094.
interface-type interface-number: Interface type and interface number.
vpn-instance vpn-instance-name: Specifies the MPLS L3 VPN for a static ARP entry. The vpn-instance-name argument is a case-sensitive string of 1 to 31 characters. Without this option, the static ARP entry belongs to the public network.
Description
Use the arp static command to configure a static ARP entry in the ARP mapping table.
Use the undo arp command to remove an ARP entry.
Note that:
· A static ARP entry is effective when the router works normally. However, when the VLAN or VLAN interface to which an ARP entry corresponds is deleted, the entry, if long, will be deleted, and if short and resolved, will become unresolved.
· The vlan-id argument specifies the VLAN corresponding to an ARP entry and must be the ID of an existing VLAN. In addition, the Ethernet interface following the argument must belong to that VLAN. The VLAN interface of the VLAN must have been created.
· If both the vlan-id and ip-address arguments are specified, the IP address of the VLAN interface corresponding to the vlan-id argument must belong to the same network segment as the IP address specified by the ip-address argument.
Related commands: display arp and reset arp.
Examples
# Configure a static ARP entry, with the IP address being 202.38.10.2, the MAC address being 00e0-fc01-0000, and the outbound interface being GigabitEthernet 3/1/1 of VLAN 10.
<Sysname> system-view
[Sysname] arp static 202.38.10.2 00e0-fc01-0000 10 gigabitethernet 3/1/1
arp timer aging
Syntax
arp timer aging aging-time
undo arp timer aging
View
System view
Default level
2: System level
Parameters
aging-time: Aging time for dynamic ARP entries in minutes, in the range of 1 to 1,440.
Description
Use the arp timer aging command to set aging time for dynamic ARP entries.
Use the undo arp timer aging command to restore the default.
By default, the aging time for dynamic ARP entries is 20 minutes.
Related commands: display arp timer aging.
Examples
# Set aging time for dynamic ARP entries to 10 minutes.
<Sysname> system-view
display arp
Syntax
display arp [ [ all | dynamic | static ] [ slot slot-number ] | vlan vlan-id | interface interface-type interface-number ] [ count | verbose ] [ | { begin | exclude | include } regular-expression ]
View
Any view
Default level
1: Monitor level
Parameters
all: Displays all ARP entries.
dynamic: Displays dynamic ARP entries.
static: Displays static ARP entries.
slot slot-number: Displays the ARP entries for the interface card specified by the slot number.
vlan vlan-id: Displays the ARP entries of the specified VLAN. The VLAN ID ranges from 1 to 4,094.
interface interface-type interface-number: Displays the ARP entries of the interface specified by the argument interface-type interface-number.
count: Displays the number of ARP entries.
verbose: Displays detailed information about ARP entries.
|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.
begin: Displays the first line that matches the specified regular expression and all lines that follow.
exclude: Displays all lines that do not match the specified regular expression.
include: Displays all lines that match the specified regular expression.
regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.
Description
Use the display arp command to display ARP entries in the ARP mapping table.
If no parameter is specified, all ARP entries are displayed.
Related commands: arp static and reset arp.
Examples
# Display the detailed information of all ARP entries.
<Sysname> display arp all verbose
Type: S-Static D-Dynamic A-Authorized
IP Address MAC Address VLAN ID Interface Aging Type
Vpn-instance Name
20.1.1.1 00e0-fc00-0001 N/A N/A N/A S
test
193.1.1.70 00e0-fe50-6503 100 GE3/1/1 N/A D
[No Vrf]
Table 1 Output description
|
Field |
Description |
|
IP Address |
IP address in an ARP entry. |
|
MAC Address |
MAC address in an ARP entry. |
|
VLAN ID |
VLAN ID contained a static ARP entry. |
|
Interface |
Outbound interface in an ARP entry. |
|
Aging |
Aging time for an ARP entry in minutes (DIS or N/A means unknown aging time or no aging time). |
|
Type |
ARP entry type: D for dynamic, S for static, and A for authorized. |
|
Vpn-instance Name |
Name of VPN instance. [No Vrf] means no VPN instance is configured for the corresponding ARP. |
# Display the number of all ARP entries
<Sysname> display arp all count
Total entry(ies): 2
The output shows a total number of two ARP entries.
display arp ip-address
Syntax
display arp ip-address [ slot slot-number ] [ verbose ] [ | { begin | exclude | include } regular-expression ]
View
Any view
Default level
1: Monitor level
Parameters
ip-address: Displays the ARP entry for the specified IP address.
slot slot-number: Displays the ARP entries for the interface card specified by the slot number.
verbose: Displays the detailed information about ARP entries.
|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.
begin: Displays the first line that matches the specified regular expression and all lines that follow.
exclude: Displays all lines that do not match the specified regular expression.
include: Displays all lines that match the specified regular expression.
regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.
Description
Use the display arp ip-address command to display the ARP entry for a specified IP address.
Related commands: arp static and reset arp.
Examples
# Display the corresponding ARP entry for the IP address 20.1.1.1.
<Sysname> display arp 20.1.1.1
Type: S-Static D-Dynamic A-Authorized
IP Address MAC Address VLAN ID Interface Aging Type
20.1.1.1 00e0-fc00-0001 N/A N/A N/A S
display arp timer aging
Syntax
display arp timer aging [ | { begin | exclude | include } regular-expression ]
View
Any view
Default level
2: System level
Parameters
|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.
begin: Displays the first line that matches the specified regular expression and all lines that follow.
exclude: Displays all lines that do not match the specified regular expression..
include: Displays all lines that match the specified regular expression.
regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.
Description
Use the display arp timer aging command to display the aging time for dynamic ARP entries.
Related commands: arp timer aging.
Examples
# Display the aging time for dynamic ARP entries.
[Sysname] display arp timer aging
Current ARP aging time is 10 minute(s)
The output shows that the aging time for dynamic ARP entries is 10 minutes.
display arp vpn-instance
Syntax
display arp vpn-instance vpn-instance-name [ count ] [ | { begin | exclude | include } regular-expression ]
View
Any view
Default level
1: Monitor level
Parameters
vpn-instance-name: Name of MPLS L3VPN, a case-sensitive string of 1 to 31 characters.
count: Displays the number of ARP entries.
|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.
begin: Displays the first line that matches the specified regular expression and all lines that follow.
exclude: Displays all lines that do not match the specified regular expression.
include: Displays all lines that match the specified regular expression.
regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.
Description
Use the display arp vpn-instance command to display the ARP entries for a specified VPN.
Related commands: arp static and reset arp.
Examples
# Display ARP entries for the VPN instance named test.
<Sysname> display arp vpn-instance test
Type: S-Static D-Dynamic A-Authorized
IP Address MAC Address VLAN ID Interface Aging Type
20.1.1.1 00e0-fc00-0001 N/A N/A N/A S
naturemask-arp enable
Syntax
naturemask-arp enable
undo naturemask-arp enable
View
System view
Default level
2: System level
Parameters
None
Description
Use the naturemask-arp enable command to enable the support for ARP requests that are from a natural network.
Use the undo naturemask-arp enable command to restore the default.
By default, the support for ARP requests from a natural network is disabled.
Examples
# Enable the support for ARP requests from a natural network.
<Sysname> system-view
[Sysname] naturemask-arp enable
reset arp
Syntax
reset arp { all | dynamic | slot slot-number | static | interface interface-type interface-number }
View
User view
Default level
2: System level
Parameters
all: Clears all ARP entries except authorized ARP entries.
dynamic: Clears all dynamic ARP entries.
static: Clears all static ARP entries.
slot slot-number: Clears the ARP entries for the interface card specified by the slot number.
interface interface-type interface-number: Clears the ARP entries for the interface specified by the argument interface-type interface-number.
Description
Use the reset arp command to clear ARP entries except authorized ARP entries from the ARP mapping table.
With interface interface-type interface-number or slot slot-id specified, the command clears only dynamic ARP entries of the interface or the interface card.
Related commands: arp static and display arp.
Examples
# Clear all static ARP entries.
<Sysname> reset arp static
arp send-gratuitous-arp
Syntax
arp send-gratuitous-arp [ interval milliseconds ]
undo arp send-gratuitous-arp
View
Layer 3 Ethernet interface view, Layer 3 Ethernet subinterface view, VLAN interface view
Default Level
2: System level
Parameters
interval milliseconds: Sets the interval at which gratuitous ARP packets are sent, in the range of 200 to 200000 milliseconds. The default value is 2000.
Description
Use the arp send-gratuitous-arp command to enable periodic sending of gratuitous ARP packets and set the sending interval for the interface.
Use the undo arp send-gratuitous-arp command to disable the interface from periodically sending gratuitous ARP packets.
By default, an interface is disabled from sending gratuitous ARP packets periodically.
Note that:
· This function takes effect only when the link of the enabled interface goes up and an IP address has been assigned to the interface.
· The IP address contained in a gratuitous ARP request can be the VRRP virtual IP address, or the primary IP address or a manually configured secondary IP address of the sending interface only. The primary IP address can be configured manually or automatically, whereas the secondary IP address must be configured manually.
· If you change the interval for sending gratuitous ARP packets, the configuration is effective at the next sending interval.
· The frequency of sending gratuitous ARP packets may be much lower than is expected if this function is enabled on multiple interfaces, or each interface is configured with multiple secondary IP addresses, or a small sending interval is configured in the preceding cases.
Examples
# Enable GigabitEthernet 5/0/1 to send gratuitous ARP packets every 300 milliseconds.
<Sysname> system-view
[Sysname] interface GigabitEthernet 5/0/1
[Sysname-GigabitEthernet5/0/1] arp send-gratuitous-arp interval 300
gratuitous-arp-sending enable
Syntax
gratuitous-arp-sending enable
undo gratuitous-arp-sending enable
View
System view
Default level
2: System level
Parameters
None
Description
Use the gratuitous-arp-sending enable command to enable the router to send gratuitous ARP packets upon receiving ARP requests from another network segment.
Use the undo gratuitous-arp-sending enable command to restore the default.
By default, a router cannot send gratuitous ARP packets when receiving ARP requests from another network segment.
Examples
# Disable the router from sending gratuitous ARP packets.
<Sysname> system-view
[Sysname] undo gratuitous-arp-sending enable
gratuitous-arp-learning enable
Syntax
gratuitous-arp-learning enable
undo gratuitous-arp-learning enable
View
System view
Default level
2: System level
Parameters
None
Description
Use the gratuitous-arp-learning enable command to enable the gratuitous ARP packet learning function.
Use the undo gratuitous-arp-learning enable command to disable the function.
By default, the function is enabled.
With this function enabled, a router receiving a gratuitous ARP packet adds the sender IP and MAC addresses in the packet to its dynamic ARP table if it finds no corresponding ARP entry exists. If the corresponding ARP entry exists, the router updates the ARP entry regardless of whether this function is enabled.
Examples
# Enable the gratuitous ARP packet learning function.
<Sysname> system-view
[Sysname] gratuitous-arp-learning enable
display local-proxy-arp
Syntax
display local-proxy-arp [ interface interface-type interface-number ] [ | { begin | exclude | include } regular-expression ]
View
Any view
Default level
2: System level
Parameters
interface interface-type interface-number: Displays the local proxy ARP status of the interface specified by the interface-type interface-number argument.
|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.
begin: Displays the first line that matches the specified regular expression and all lines that follow.
exclude: Displays all lines that do not match the specified regular expression.
include: Displays all lines that match the specified regular expression.
regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.
Description
Use the display local-proxy-arp command to display the local proxy ARP status.
If no interface is specified, the local proxy ARP status of all interfaces is displayed.
Related commands: local-proxy-arp enable.
Examples
# Display the local proxy ARP status on VLAN-interface 2.
<Sysname> display local-proxy-arp interface vlan-interface 2
Interface Vlan-interface2
Local Proxy ARP status: enabled
display proxy-arp
Syntax
display proxy-arp [ interface interface-type interface-number ] [ | { begin | exclude | include } regular-expression ]
View
Any view
Default level
2: System level
Parameters
interface interface-type interface-number: Displays the proxy ARP status of the interface.
|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.
begin: Displays the first line that matches the specified regular expression and all lines that follow.
exclude: Displays all lines that do not match the specified regular expression.
include: Displays all lines that match the specified regular expression.
regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.
Description
Use the display proxy-arp command to display the proxy ARP status.
If an interface is specified, proxy ARP status of the specified interface is displayed; if no interface is specified, proxy ARP status of all interfaces is displayed.
Related commands: proxy-arp enable.
Examples
# Display the proxy ARP status on GigabitEthernet3/1/1.
<Sysname> display proxy-arp interface gigabitethernet 3/1/1
Interface GigabitEthernet 3/1/1
Proxy ARP status: disabled
local-proxy-arp enable
Syntax
local-proxy-arp enable [ ip-range startIP to endIP ]
undo local-proxy-arp enable
View
VLAN interface view, Layer 3 Ethernet interface view, Layer 3 Ethernet subinterface view, Layer 3 aggregate interface view, Layer 3 aggregate subinterface view
Default level
2: System level
Parameters
ip-range startIP to endIP: Specifies the IP address range within which local proxy ARP is enabled. The start IP address must be lower than or equal to the end IP address.
Description
Use the local-proxy-arp enable command to enable local proxy ARP.
Use the undo local-proxy-arp enable command to disable local proxy ARP.
By default, local proxy ARP is disabled.
Note that only one IP address range can be specified by using the ip-range keyword on an interface.
Related commands: display local-proxy-arp.
Examples
# Enable local proxy ARP on VLAN-interface 2.
<Sysname> system-view
[Sysname] interface vlan-interface 2
[Sysname-Vlan-interface2] local-proxy-arp enable
# Enable local proxy ARP on GigabitEthernet 3/1/2 for a specific IP address range.
<Sysname> system-view
[Sysname] interface gigabitethernet 3/1/2
[Sysname-GigabitEthernet3/1/2] local-proxy-arp enable ip-range 1.1.1.1 to 1.1.1.20
proxy-arp enable
Syntax
proxy-arp enable
undo proxy-arp enable
View
VLAN interface view, Layer 3 Ethernet interface view, Layer 3 Ethernet subinterface view, Layer 3 aggregate interface view, Layer 3 aggregate subinterface view
Default level
2: System level
Parameters
None
Description
Use the proxy-arp enable command to enable proxy ARP.
Use the undo proxy-arp enable command to disable proxy ARP.
By default, proxy ARP is disabled.
Related commands: display proxy-arp.
Examples
# Enable proxy ARP on GigabitEthernet 3/1/1.
<Sysname> system-view
[Sysname] interface gigabitethernet 3/1/1
