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- Table of Contents
-
- 05-Network Connectivity Command Reference
- 00-Preface
- 01-MAC address table commands
- 02-Ethernet link aggregation commands
- 03-VLAN commands
- 04-Spanning tree commands
- 05-LLDP commands
- 06-Layer 2 forwarding commands
- 07-PPP commands
- 08-L2TP commands
- 09-ARP commands
- 10-IP addressing commands
- 11-DHCP commands
- 12-DHCPv6 commands
- 13-DNS commands
- 14-NAT commands
- 15-IP performance optimization commands
- 16-IPv6 basics commands
- 17-Tunneling commands
- 18-GRE commands
- 19-ADVPN commands
- 20-Basic IP routing commands
- 21-IP forwarding basics commands
- 22-Static routing commands
- 23-IPv6 static routing commands
- 24-RIP commands
- 25-Policy-based routing commands
- 26-IPv6 policy-based routing commands
- 27-OSPF commands
- 28-RIPng commands
- 29-BGP commands
- 30-IGMP snooping commands
- 31-MLD snooping commands
- Related Documents
-
| Title | Size | Download |
|---|---|---|
| 09-ARP commands | 229.06 KB |
gratuitous-arp mac-change retransmit
gratuitous-arp-learning enable
ARP direct route advertisement commands
ARP commands
arp check enable
Use arp check enable to enable dynamic ARP entry check.
Use undo arp check enable to disable dynamic ARP entry check.
Syntax
arp check enable
undo arp check enable
Default
Dynamic ARP entry check is enabled.
Views
System view
Predefined user roles
network-admin
Usage guidelines
Dynamic ARP entry check disables a device from supporting dynamic ARP entries with multicast MAC addresses. The device cannot learn dynamic ARP entries containing multicast MAC addresses. You cannot manually add static ARP entries that contain multicast MAC addresses.
When dynamic ARP entry check is disabled, ARP entries containing multicast MAC addresses are supported. The device can learn dynamic ARP entries containing multicast MAC addresses obtained from the ARP packets sourced from a unicast MAC address. You can also manually add static ARP entries containing multicast MAC addresses.
Examples
# Enable dynamic ARP entry check.
<Sysname> system-view
[Sysname] arp check enable
arp check log enable
Use arp check log enable to enable the ARP logging feature.
Use undo arp check log enable to disable the ARP logging feature.
Syntax
arp check log enable
undo arp check log enable
Default
ARP logging is disabled.
Views
System view
Predefined user roles
network-admin
Usage guidelines
This feature enables a device to log ARP events when ARP cannot resolve IP addresses correctly. The log information helps administrators locate and solve problems. The device can log the following ARP events:
· On a proxy ARP-disabled interface, the target IP address of a received ARP packet is not one of the following IP addresses:
¡ The IP address of the receiving interface.
¡ The public IP address after NAT.
· The sender IP address of a received ARP reply conflicts with one of the following IP addresses:
¡ The IP address of the receiving interface.
¡ The public IP address after NAT.
The device sends ARP log messages to the information center. You can use the info-center source command to specify the log output rules for the information center. For more information about information center, see System Management Configuration Guide.
The device can generate a large number of ARP logs. To conserve system resources, enable ARP logging only when you are auditing or troubleshooting ARP events.
Examples
# Enable ARP logging.
<Sysname> system-view
[Sysname] arp check log enable
arp max-learning-num
Use arp max-learning-num to set the dynamic ARP learning limit for an interface.
Use undo arp max-learning-num to restore the default.
Syntax
arp max-learning-num max-number
undo arp max-learning-num
Default
|
Hardware series |
Model |
Product code |
Default |
|
WX2500X series |
WX2560X WX2580X |
EWP-WX2560X EWP-WX2580X |
· EWP-WX2560X: 8192 · EWP-WX2580X: 16384 |
|
WX2500X-E series |
WX2508X-E |
EWP-WX2508X-E |
· 16000 |
|
Hardware series |
Model |
Product code |
Default |
|
WX2500X-LI series |
WX2510X-LI WX2510X-PWR-LI WX2520X-LI WX2540X-LI WX2550X-LI WX2560X-LI WX2580X-LI |
EWP-WX2510X-LI EWP-WX2510X-PWR-LI EWP-WX2520X-LI EWP-WX2540X-LI EWP-WX2550X-LI EWP-WX2560X-LI EWP-WX2580X-LI |
· EWP-WX2510X-LI: 2048 · EWP-WX2510X-PWR-LI: 2048 · EWP-WX2520X-LI: 4096 · EWP-WX2540X-LI: 6144 · EWP-WX2550X-LI: 8192 · EWP-WX2560X-LI: 8192 · EWP-WX2580X-LI: 16384 |
|
Hardware series |
Model |
Product code |
Default |
|
WX2800X series |
WX2812X-PWR WX2860X WX2880X |
EWP-WX2812X-PWR EWP-WX2860X EWP-WX2880X |
· EWP-WX2812X-PWR: 2048 · EWP-WX2860X: 8192 · EWP-WX2880X: 16384 |
|
WSG1800X series |
WSG1808X-PWR WSG1808X-PWR WSG1812X-PWR WSG1840X |
EWP-WSG1808X-PWR EWP-WSG1808X-PWR-JP EWP-WSG1812X-PWR EWP-WSG1840X |
· EWP-WSG1808X-PWR: 2048 · EWP-WSG1808X-PWR-JP: 2048 · EWP-WSG1812X-PWR: 2048 · EWP-WSG1840X: 4096 |
Views
Layer 2 Ethernet interface view
Layer 2 aggregate interface view
Layer 3 Ethernet interface view
Layer 3 Ethernet subinterface view
VLAN interface view
Predefined user roles
network-admin
Parameters
max-number: Specifies the maximum number of dynamic ARP entries for an interface.
The following compatibility matrixes show the value ranges for the max-number argument:
|
Hardware series |
Model |
Product code |
Value range |
|
WX2500X series |
WX2560X WX2580X |
EWP-WX2560X EWP-WX2580X |
EWP-WX2560X: 0 to 8192 EWP-WX2580X: 0 to 16384 |
|
WX2500X-E series |
WX2508X-E |
EWP-WX2508X-E |
0 to 16000 |
|
Hardware series |
Model |
Product code |
Value range |
|
WX2500X-LI series |
WX2510X-LI WX2510X-PWR-LI WX2520X-LI WX2540X-LI WX2550X-LI WX2560X-LI WX2580X-LI |
EWP-WX2510X-LI EWP-WX2510X-PWR-LI EWP-WX2520X-LI EWP-WX2540X-LI EWP-WX2550X-LI EWP-WX2560X-LI EWP-WX2580X-LI |
· EWP-WX2510X-LI: 0 to 2048 · EWP-WX2510X-PWR-LI: 0 to 2048 · EWP-WX2520X-LI: 0 to 4096 · EWP-WX2540X-LI: 0 to 6144 · EWP-WX2550X-LI: 0 to 8192 · EWP-WX2560X-LI: 0 to 8192 · EWP-WX2580X-LI: 0 to 16384 |
|
Hardware series |
Model |
Product code |
Value range |
|
WX2800X series |
WX2812X-PWR WX2860X WX2880X |
EWP-WX2812X-PWR EWP-WX2860X EWP-WX2880X |
EWP-WX2812X-PWR: 0 to 2048 EWP-WX2860X: 0 to 8192 EWP-WX2880X: 0 to 16384 |
|
WSG1800X series |
WSG1808X-PWR WSG1808X-PWR WSG1812X-PWR WSG1840X |
EWP-WSG1808X-PWR EWP-WSG1808X-PWR-JP EWP-WSG1812X-PWR EWP-WSG1840X |
EWP-WSG1808X-PWR: 0 to 2048 EWP-WSG1808X-PWR-JP: 0 to 2048 EWP-WSG1812X-PWR: 0 to 2048 EWP-WSG1840X: 0 to 4096 |
Usage guidelines
An interface can dynamically learn ARP entries. To prevent an interface from holding too many ARP entries, you can set the maximum number of dynamic ARP entries that the interface can learn. When the maximum number is reached, the interface stops learning ARP entries.
When the number argument is set to 0, the interface is disabled from learning dynamic ARP entries.
Examples
# Specify VLAN-interface 40 to learn a maximum of 10 dynamic ARP entries.
<Sysname> system-view
[Sysname] interface vlan-interface 40
[Sysname-Vlan-interface40] arp max-learning-num 10
# Specify GigabitEthernet 1/0/1 to learn a maximum of 10 dynamic ARP entries.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] arp max-learning-num 10
# Specify Layer 2 aggregate interface Bridge-Aggregation 1 to learn a maximum of 10 dynamic ARP entries.
<Sysname> system-view
[Sysname] interface bridge-aggregation 1
[Sysname-Bridge-Aggregation1] arp max-learning-num 10
arp max-learning-number
Use arp max-learning-number to set the dynamic ARP learning limit for a device.
Use undo arp max-learning-number to restore the default.
Syntax
arp max-learning-number max-number
undo arp max-learning-number
Default
|
Hardware series |
Model |
Product code |
Default |
|
WX2500X series |
WX2560X WX2580X |
EWP-WX2560X EWP-WX2580X |
· EWP-WX2560X: 8192 · EWP-WX2580X: 16384 |
|
WX2500X-E series |
WX2508X-E |
EWP-WX2508X-E |
· 16000 |
|
Hardware series |
Model |
Product code |
Default |
|
WX2500X-LI series |
WX2510X-LI WX2510X-PWR-LI WX2520X-LI WX2540X-LI WX2550X-LI WX2560X-LI WX2580X-LI |
EWP-WX2510X-LI EWP-WX2510X-PWR-LI EWP-WX2520X-LI EWP-WX2540X-LI EWP-WX2550X-LI EWP-WX2560X-LI EWP-WX2580X-LI |
· EWP-WX2510X-LI: 2048 · EWP-WX2510X-PWR-LI: 2048 · EWP-WX2520X-LI: 4096 · EWP-WX2540X-LI: 6144 · EWP-WX2550X-LI: 8192 · EWP-WX2560X-LI: 8192 · EWP-WX2580X-LI: 16384 |
|
Hardware series |
Model |
Product code |
Default |
|
WX2800X series |
WX2812X-PWR WX2860X WX2880X |
EWP-WX2812X-PWR EWP-WX2860X EWP-WX2880X |
· EWP-WX2812X-PWR: 2048 · EWP-WX2860X: 8192 · EWP-WX2880X: 16384 |
|
WSG1800X series |
WSG1808X-PWR WSG1808X-PWR WSG1812X-PWR WSG1840X |
EWP-WSG1808X-PWR EWP-WSG1808X-PWR-JP EWP-WSG1812X-PWR EWP-WSG1840X |
· EWP-WSG1808X-PWR: 2048 · EWP-WSG1808X-PWR-JP: 2048 · EWP-WSG1812X-PWR: 2048 · EWP-WSG1840X: 4096 |
Views
System view
Predefined user roles
network-admin
Parameters
max-number: Specifies the maximum number of dynamic ARP entries for a device.
The following compatibility matrixes show the value ranges for the max-number argument:
|
Hardware series |
Model |
Product code |
Value range |
|
WX2500X series |
WX2560X WX2580X |
EWP-WX2560X EWP-WX2580X |
EWP-WX2560X: 0 to 8192 EWP-WX2580X: 0 to 16384 |
|
WX2500X-E series |
WX2508X-E |
EWP-WX2508X-E |
0 to 16000 |
|
Hardware series |
Model |
Product code |
Value range |
|
WX2500X-LI series |
WX2510X-LI WX2510X-PWR-LI WX2520X-LI WX2540X-LI WX2550X-LI WX2560X-LI WX2580X-LI |
EWP-WX2510X-LI EWP-WX2510X-PWR-LI EWP-WX2520X-LI EWP-WX2540X-LI EWP-WX2550X-LI EWP-WX2560X-LI EWP-WX2580X-LI |
· EWP-WX2510X-LI: 0 to 2048 · EWP-WX2510X-PWR-LI: 0 to 2048 · EWP-WX2520X-LI: 0 to 4096 · EWP-WX2540X-LI: 0 to 6144 · EWP-WX2550X-LI: 0 to 8192 · EWP-WX2560X-LI: 0 to 8192 · EWP-WX2580X-LI: 0 to 16384 |
|
Hardware series |
Model |
Product code |
Value range |
|
WX2800X series |
WX2812X-PWR WX2860X WX2880X |
EWP-WX2812X-PWR EWP-WX2860X EWP-WX2880X |
EWP-WX2812X-PWR: 0 to 2048 EWP-WX2860X: 0 to 8192 EWP-WX2880X: 0 to 16384 |
|
WSG1800X series |
WSG1808X-PWR WSG1808X-PWR WSG1812X-PWR WSG1840X |
EWP-WSG1808X-PWR EWP-WSG1808X-PWR-JP EWP-WSG1812X-PWR EWP-WSG1840X |
EWP-WSG1808X-PWR: 0 to 2048 EWP-WSG1808X-PWR-JP: 0 to 2048 EWP-WSG1812X-PWR: 0 to 2048 EWP-WSG1840X: 0 to 4096 |
Usage guidelines
A device can dynamically learn ARP entries. To prevent a device from holding too many ARP entries, you can set the maximum number of dynamic ARP entries that the device can learn. When the maximum number is reached, the device stops learning ARP entries.
When the number argument is set to 0, the device is disabled from learning dynamic ARP entries.
Examples
# Set the ARP learning limit to 64 for slot 1.
<Sysname> system-view
[Sysname] arp max-learning-number 64 slot 1
arp static
Use arp static to configure a static ARP entry.
Use undo arp to delete an ARP entry.
Syntax
arp static ip-address mac-address [ vlan-id interface-type interface-number ] [ description text ]
undo arp ip-address
Default
No static ARP entries exist.
Views
System view
Predefined user roles
network-admin
Parameters
ip-address: Specifies an IP address for the static ARP entry.
mac-address: Specifies a MAC address for the static ARP entry, in the format of H-H-H.
vlan-id: Specifies the ID of a VLAN to which the static ARP entry belongs. The value range is 1 to 4094.
interface-type interface-number: Specifies an interface by its type and number.
description text: Specifies the description for the static ARP entry, a case-sensitive string of 1 to 255 characters.
Usage guidelines
A static ARP entry is manually configured and maintained. It does not age out and cannot be overwritten by any dynamic ARP entry.
Static ARP entries can be short or long.
A resolved short static ARP entry becomes unresolved upon certain events, for example, when the resolved output interface goes down, or the corresponding VLAN or VLAN interface is deleted.
Long static ARP entries are effective or ineffective. Ineffective long static ARP entries cannot be used for packet forwarding. A long static ARP entry is ineffective when any of the following conditions exists:
· The IP address in the entry conflicts with a local IP address.
· No local interface has an IP address in the same subnet as the IP address in the ARP entry.
If you specify the vlan-id interface-type interface-number argument, follow these restrictions and guidelines:
· The interface can be an Ethernet interface or an aggregate interface.
· The VLAN and VLAN interface must already exist. The specified Ethernet interface must belong to the specified VLAN.
· The IP address of the VLAN interface and the IP address specified by the ip-address argument must be on the same network.
· If a VLAN or VLAN interface is deleted, a long static ARP entry for the VLAN is deleted and a resolved short static ARP entry for the VLAN becomes unresolved.
You can configure a description for each static ARP entry for easy identification.
Examples
# Configure a long static ARP entry that contains IP address 202.38.10.2, MAC address 00e0-fc01-0000, and output interface GigabitEthernet 1/0/1 in VLAN 10.
<Sysname> system-view
[Sysname] arp static 202.38.10.2 00e0-fc01-0000 10 gigabitethernet 1/0/1
Related commands
display arp
reset arp
arp timer aging
Use arp timer aging to set the aging timer for dynamic ARP entries.
Use undo arp timer aging to restore the default.
Syntax
arp timer aging aging-time
undo arp timer aging
Default
The aging timer for dynamic ARP entries is 20 minutes.
Views
System view
Predefined user roles
network-admin
Parameters
aging-time: Specifies the aging timer in minutes. The value range for this argument is 1 to 1440.
Usage guidelines
Each dynamic ARP entry in the ARP table has a limited lifetime, called an aging timer. The aging timer of a dynamic ARP entry is reset each time the dynamic ARP entry is updated. Dynamic ARP entries that are not updated before their aging timers expire are deleted from the ARP table.
Set the aging timer for dynamic ARP entries as needed. For example, when you configure proxy ARP, set a short aging time so that invalid dynamic ARP entries can be deleted in a timely manner.
Examples
# Set the aging timer for dynamic ARP entries to 10 minutes.
<Sysname> system-view
Related commands
display arp timer aging
display arp
Use display arp to display ARP entries.
Syntax
display arp [ [ all | dynamic | static ] | vlan vlan-id | interface interface-type interface-number ] [ count | verbose ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
all: Displays all ARP entries.
dynamic: Displays dynamic ARP entries.
static: Displays static ARP entries.
vlan vlan-id: Specifies a VLAN by its VLAN ID. The VLAN ID is in the range of 1 to 4094.
interface interface-type interface-number: Specifies an interface by its type and number. If you do not specify an interface, this command displays ARP entries for all interfaces.
count: Displays the number of ARP entries.
verbose: Displays detailed information about ARP entries.
Usage guidelines
This command displays information about static, dynamic, and multiport ARP entries, including the IP address, MAC address, VLAN ID, output interface, entry type, and aging timer.
Examples
# Display all ARP entries.
Type: S-Static D-Dynamic O-Openflow R-Rule I-Invalid
IP address MAC address VLAN/VSI name Interface/Link ID Aging Type
1.1.1.2 00e0-fc00-0001 12 GE1/0/2 16 D
# Display detailed information about all ARP entries.
<Sysname> display arp all verbose
IP address : 1.1.1.1 MAC address : 02e0-f102-0023
Type : Static Aging : --
Interface : GE1/0/1 SVLAN/CVLAN : 1/--
VPN instance : --
Link ID : --
VXLAN ID : --
VSI name : --
VSI interface : --
MPLS PW ID : --
MPLS peer PE address: --
Nickname : 0x0000
Description : User1
IP address : 1.1.1.2 MAC address : 00e0-fc00-0001
Type : Dynamic Aging : 16 min
Interface : GE1/0/2 SVLAN/CVLAN : 12/--
VPN instance : --
Link ID : --
VXLAN ID : --
VSI name : --
VSI interface : --
MPLS PW ID : --
MPLS peer PE address: --
Nickname : 0x0000
Description : --
IP address : 1.1.1.3 MAC address : 00e0-fe50-6503
Type : Dynamic Aging : 16 min
Interface : Tunnel1 SVLAN/CVLAN : --/--
VPN instance : --
Link ID : --
VXLAN ID : --
VSI name : --
VSI interface : --
MPLS PW ID : --
MPLS peer PE address: --
Nickname : 0x0000
Description : --
# Display the number of all ARP entries.
<Sysname> display arp all count
Total number of entries : 3
Table 1 Command output
|
Field |
Description |
|
IP address |
IP address in an ARP entry. |
|
MAC address |
MAC address in an ARP entry. |
|
VLAN/VSI name |
ID of the VLAN to which the ARP entry belongs. This field displays hyphens (--) in either of the following situations: · The ARP entry is an unresolved short static ARP entry. · The output interface of the ARP entry does not belong to the VLAN. |
|
Interface |
Output interface in the ARP entry. This field displays hyphens (--) in either of the following situations: · The ARP entry is an unresolved short static ARP entry. · The ARP entry is a multiport ARP entry and has
no output interface information. |
|
Link ID |
Link ID in the ARP entry. This field displays hyphens (--) if the ARP entry does not belong to any VSI. |
|
Aging |
Aging time for an ARP entry in minutes. For a static ARP entry, this field always displays hyphens (--). The static ARP entry never ages out unless you delete it manually. For a dynamic ARP entry, this field displays hyphens (--) if the aging time is unknown. |
|
Type |
ARP entry type: · D—Dynamic. · S—Static. · I—Invalid. ARP entry type: · D—Dynamic. · S—Static. · R—Rule. · I—Invalid. |
|
SVLAN/CVLAN |
Outer VLAN ID and inner VLAN ID in the ARP entry. This field displays hyphens (--) in either of the following situations: · The ARP entry is an unresolved short static ARP entry. · The interface in the ARP entry does not belong to the VLAN. |
|
VPN instance |
This field is not supported in the current software version. Name of VPN instance. If no VPN instance is configured for the ARP entry, this field displays hyphens (--). |
|
MPLS PW ID |
This field is not supported in the current software version. ID of the PW to which the ARP entry belongs. This field displays two hyphens (--) if the ARP entry does not belong to a PW. |
|
MPLS peer PE address |
This field is not supported in the current software version. IP address of the remote PE on the PW. This field displays two hyphens (--) if the ARP entry does not belong to a PW. |
|
Nickname |
This field is not supported in the current software version. Nickname of the ARP entry. The nickname is a string of four hexadecimal numbers, for example, 0x012a. |
|
Description |
Description of the ARP entry. If no description is configured for the ARP entry, this field displays hyphens (--). |
|
Total number of entries |
Number of ARP entries. |
Related commands
arp static
reset arp
display arp ip-address
Use display arp ip-address to display the ARP entry for an IP address.
Syntax
display arp ip-address [ verbose ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
ip-address: Displays the ARP entry for the specified IP address.
verbose: Displays the detailed information about the specified ARP entry.
Usage guidelines
The ARP entry information includes the IP address, MAC address, VLAN ID, output interface, entry type, and aging timer.
Examples
# Display the ARP entry for the IP address 20.1.1.1.
<Sysname> display arp 20.1.1.1
Type: S-Static D-Dynamic O-Openflow R-Rule I-Invalid
IP address MAC address VLAN/VSI name Interface/Link ID Aging Type
20.1.1.1 00e0-fc00-0001 -- -- -- S
Related commands
arp static
reset arp
display arp log
Use display arp log to display brief ARP log information.
Syntax
display arp log [ interface interface-type interface-number | ip ip-address ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
interface: Displays the ARP log information for the specified interface.
ip: Displays the ARP log information for the specified IP address.
Examples
# Display brief information about all ARP log entries.
<Sysname> display arp log
Operate : ADD Reason : ADDBYMSG
Mac : 0000-0000-0000 Interface: GE1/0/1
SVLAN : 65535 IP : 1.1.1.2
CVLAN : 65535 Time : Oct 28 22:22:02 2022
Operate : ADD Reason : ADDBYMSG
Mac : 0000-0000-0000 Interface: GE1/0/1
SVLAN : 65535 IP : 1.1.1.1
CVLAN : 65535 Time : Oct 28 22:22:02 2022
Table 2 Command output
|
Field |
Description |
|
Operate |
ARP entry operation type: · ADD—Add an entry to the table. · MOD—Modify an existing entry in the table. · DEL—Delete an entry from the table. |
|
Reason |
Source of the ARP log entry: · DRNIMSG—Added in response to an ARP entry update message from the M-LAG module. · STATICFIX—Added in response to conversion of a dynamic ARP entry to a static one. · PKTLEARN—Added by learning from an ARP packet. · STATICMSG—Added through static configuration. · ADDBYRULE—Added by the IPoE or portal feature. · ADDBYOP—Added by the OpenFlow feature. · ADDBYMSG—Added through ARP entry synchronization. · ADDWADJ—Added in response to an IPv4 adjacency entry refresh message sent by the WAN link adjacency table module. · ADDWADJSYN—Added in response to an inter-card IPv4 adjacency entry synchronization message sent by the WAN link adjacency table module. · DRVRELOAD—Added in response to the ARP update operation done in the driver. · STATICEVENT—Added through ARP entry update in response to a long static entry event. · SYNCWITHDRV—Added in synchronization with the driver. · RELOADBYPW—Added in response to the PW reload operation. · RELOADBYMMAC— Added through ARP entry refresh triggered by the MultiMac module. · RELOADBYRB—Added through ARP entry refresh triggered by the RB module. · DELBYCFG—Manually deleted. · DELBYIPVRF—Deleted in bulk. · DELBYVSRP—Deleted by VSRP. · DELBYNODUMMY—Deleted due to lack of a DUMMY entry. · DELBYSMOOTH—Deleted upon ARP entry smoothing. · DELBYSMOOTHFILTER—Deleted through filtering in an ARP entry smooth operation. · DELCONFIGIPIF—Deleted upon an IPv6 address or interface conflict. · DELARPSYN—Deleted upon an inter-card ARP entry synchronization. · DELWADJMSG—Deleted upon deletion of the corresponding IPv4 adjacency entry from the WAN link adjacency table. · DELWADJIFMSG—Deleted by interface upon deletion of the corresponding IPv4 adjacency entry from the WAN link adjacency table. · DELWADJBI—Deleted upon reception of the entry deletion message sent from the WAN link adjacency table module to the link layer in the kernel. · DELWADJDUMMY—Deleted upon deletion of the corresponding DUMMY entry by the WAN link adjacency table module. · DELWADJIFEVENT—Deleted upon deletion of the corresponding IPv4 adjacency entry done by the WAN link adjacency table module in response to an interface event. · DELWADJALL—Deleted upon deletion of all IPv6 adjacency entries from the WAN link adjacency table. · DELWADJ—Deleted upon deletion of the corresponding IPv6 adjacency entry from the WAN link adjacency table. · DELWADJSAGE—Deleted upon deletion of the corresponding IPv6 adjacency entry that had aged out from the WAN link adjacency table. · DELWADJIFSYN—Deleted upon deletion of the corresponding IPv4 adjacency entry from the WAN link adjacency table in response to interface entry synchronization. · DELWADJSYNMSG—Deleted upon deletion of the corresponding IPv4 adjacency entry from the WAN link adjacency table in response to inter-card entry synchronization. · DELWADJSMOOTH—Deleted upon deletion of the corresponding IPv4 adjacency entry because of entry smoothing done by the WAN link adjacency table module. · DELWADJPULLFINISH—Deleted upon deletion of the corresponding IPv4 adjacency entry after the WAN link adjacency table module successfully obtained entries in bulk. · DELPORTLVLAN—Deleted upon removal of the port from the VLAN. · DELVLANMODCHG—Deleted upon VLAN mode change. · DELLIMIT—Deleted because the number of ARP entries has reached the limit. · DELARPBYOPIF—Deleted upon deletion of the interface. · DELARPVLANEVENT—Deleted upon a VLAN event. · DELARPSTATUS—Deleted upon ARP entry status change. · DELARPBYIPIF—Deleted by specify the IPv4 address or interface. · DELARPBYIFMAP—Deleted upon an interface mapping operation. · DELARPBYIFDOWN— Deleted because the interface went down. · DELARPBYIFAGG—Deleted because the interface was added to a link aggregation group. · DELARPBYNODE—Deleted upon deletion of ARP entries by slot. · DELARPBYALL—Deleted upon deletion of all ARP entries. · DELARPBYALLEM—Deleted upon deletion of all ARP entries from non-management interfaces. · DELARPBYPW—Deleted upon deletion of ARP entries from a PW. · DELARPBYPWVSI—Deleted upon deletion of ARP. entries done by PWVSI. · DELARPBYMACNOTIFY—Deleted upon reception of ARP entries from MAC. · DELARPBYRB—Deleted upon a RB action. · DELARPBYTCPKEEP—Deleted because of the topology change notification (TCN) flag. · DELARPBYSTATICFIX—Deleted upon conversion of a dynamic entry to a static entry. · DELBYPULLFINISH—Deleted upon a successful batch data pull. · DELSTATICCONFLICT—Deleted upon a static configuration conflict. · UPDATEBYMICSEG—Updated upon microsegmentation. |
|
IP |
IP address in the ARP entry. |
|
Mac |
MAC address in the ARP entry. |
|
Interface |
Name of the outgoing interface in the ARP entry. |
|
SVLAN |
Service provider VLAN. |
|
CVLAN |
Customer VLAN. |
|
Time |
Timestamp of log creation. |
display arp timer aging
Use display arp timer aging to display the aging timer of dynamic ARP entries.
Syntax
display arp timer aging
Views
Any view
Predefined user roles
network-admin
network-operator
Examples
# Display the aging timer of dynamic ARP entries.
<Sysname> display arp timer aging
Current ARP aging time is 20 minute(s)(default)
Related commands
arp timer aging
reset arp
Use reset arp to clear ARP entries from the ARP table.
Syntax
reset arp { all | dynamic | interface interface-type interface-number | static }
Views
User view
Predefined user roles
network-admin
Parameters
all: Clears all ARP entries.
dynamic: Clears all dynamic ARP entries.
static: Clears all static ARP entries.
interface interface-type interface-number: Specifies an interface by its type and number. If you do not specify an interface, this command clears ARP entries for all interfaces.
Examples
# Clear all static ARP entries.
<Sysname> reset arp static
Related commands
arp static
display arp
Gratuitous ARP commands
arp ip-conflict log prompt
Use arp ip-conflict log prompt to enable IP conflict notification.
Use undo arp ip-conflict log prompt to restore the default.
Syntax
arp ip-conflict log prompt
undo arp ip-conflict log prompt
Default
IP conflict notification is disabled.
Views
System view
Predefined user roles
network-admin
Examples
# Enable IP conflict notification on the device.
<Sysname> system-view
[Sysname] arp ip-conflict log prompt
arp send-gratuitous-arp
Use arp send-gratuitous-arp to enable periodic sending of gratuitous ARP packets on an interface.
Use undo arp send-gratuitous-arp to disable the interface from periodically sending gratuitous ARP packets.
Syntax
arp send-gratuitous-arp [ interval interval ]
undo arp send-gratuitous-arp
Default
Periodic sending of gratuitous ARP packets is disabled.
Views
Layer 3 Ethernet interface view
Layer 3 Ethernet subinterface view
VLAN interface view
Predefined user roles
network-admin
Parameters
interval interval: Specifies the sending interval in the range of 200 to 200000 milliseconds. The default value is 2000 milliseconds.
Usage guidelines
This feature takes effect on an interface only when the interface has an IP address and the data link layer state of the interface is up.
This feature can send gratuitous ARP requests only for the sending interface's primary IP address or manually configured secondary IP address. The primary IP address can be configured manually or automatically, whereas the secondary IP address must be configured manually.
If you change the sending interval for gratuitous ARP packets, the configuration takes effect at the next sending interval.
The sending interval for gratuitous ARP packets might be much longer than the set interval when any of the following conditions exist:
· This feature is enabled on multiple interfaces.
· Each interface is configured with multiple secondary IP addresses.
· A small sending interval is configured in the preceding cases.
Examples
# Enable VLAN-interface 2 to send gratuitous ARP packets every 300 milliseconds.
<Sysname> system-view
[Sysname] interface vlan-interface 2
[Sysname-Vlan-interface2] arp send-gratuitous-arp interval 300
gratuitous-arp mac-change retransmit
Use gratuitous-arp mac-change retransmit to set the times and the interval for retransmitting a gratuitous ARP packet for the device MAC address change.
Use undo gratuitous-arp mac-change retransmit to restore the default.
Syntax
gratuitous-arp mac-change retransmit times interval seconds
undo gratuitous-arp mac-change retransmit
Default
The device sends a gratuitous packet for its MAC address change once only.
Views
System view
Predefined user roles
network-admin
Parameters
times: Specifies the times of retransmitting a gratuitous packet, in the range of 1 to 10.
interval seconds: Specifies the interval for retransmitting a gratuitous packet, in the range of 1 to 10 seconds.
Usage guidelines
The device sends a gratuitous ARP packet to inform other devices of its MAC address change. However, the other devices might fail to receive the packet because the device sends the gratuitous ARP packet once only by default. Use this command to configure gratuitous ARP retransmission parameters to ensure that the other devices can receive the packet.
After you execute this command, the device will retransmit a gratuitous ARP packet for its MAC address change at the specified interval for the specified times.
Examples
# Set the times to 3 and the interval to 5 for retransmitting a gratuitous ARP packet for the device MAC address change.
<Sysname> system-view
[Sysname] gratuitous-arp mac-change retransmit 3 interval 5
gratuitous-arp-learning enable
Use gratuitous-arp-learning enable to enable learning of gratuitous ARP packets.
Use undo gratuitous-arp-learning enable to disable learning of gratuitous ARP packets.
Syntax
gratuitous-arp-learning enable
undo gratuitous-arp-learning enable
Default
Learning of gratuitous ARP packets is enabled.
Views
System view
Predefined user roles
network-admin
Usage guidelines
The learning of gratuitous ARP packets feature allows a device to maintain its ARP table by creating or updating ARP entries based on received gratuitous ARP packets.
When this feature is disabled, the device uses received gratuitous ARP packets to update existing ARP entries only. ARP entries are not created based on the received gratuitous ARP packets, which saves ARP table space.
Examples
# Enable learning of gratuitous ARP packets.
<Sysname> system-view
[Sysname] gratuitous-arp-learning enable
gratuitous-arp-sending enable
Use gratuitous-arp-sending enable to enable sending gratuitous ARP packets upon receiving ARP requests whose sender IP address is on a different subnet.
Use undo gratuitous-arp-sending enable to disable sending gratuitous ARP packets upon receiving ARP requests whose sender IP address is on a different subnet.
Syntax
gratuitous-arp-sending enable
undo gratuitous-arp-sending enable
Default
A device does not send gratuitous ARP packets when it receives ARP requests whose sender IP address is on a different subnet.
Views
System view
Predefined user roles
network-admin
Examples
# Disable a device from sending gratuitous ARP packets upon receiving ARP requests whose sender IP address is on a different subnet.
<Sysname> system-view
[Sysname] undo gratuitous-arp-sending enable
Proxy ARP commands
display local-proxy-arp
Use display local-proxy-arp to display the local proxy ARP status.
Syntax
display local-proxy-arp [ interface interface-type interface-number ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
interface interface-type interface-number: Specifies an interface by its type and number. If you do not specify an interface, this command displays the local proxy ARP status for all interfaces.
Usage guidelines
You can use this command to check whether local proxy ARP is enabled or disabled.
Examples
# Display the local proxy ARP status for VLAN-interface 2.
<Sysname> display local-proxy-arp interface vlan-interface 2
Interface Vlan-interface2
Local Proxy ARP status: enabled
Related commands
local-proxy-arp enable
display proxy-arp
Use display proxy-arp to display the proxy ARP status.
Syntax
display proxy-arp [ interface interface-type interface-number ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
interface interface-type interface-number: Specifies an interface by its type and number. If you do not specify an interface, this command displays the proxy ARP status for all interfaces.
Usage guidelines
You can use this command to check whether proxy ARP is enabled or disabled.
Examples
# Display the proxy ARP status on VLAN-interface 2.
<Sysname> display proxy-arp interface vlan-interface 2
Interface Vlan-interface2
Proxy ARP status: disabled
Related commands
proxy-arp enable
local-proxy-arp enable
Use local-proxy-arp enable to enable local proxy ARP.
Use undo local-proxy-arp enable to disable local proxy ARP.
Syntax
local-proxy-arp enable [ ip-range start-ip-address to end-ip-address ]
undo local-proxy-arp enable
Default
Local proxy ARP is disabled.
Views
Layer 3 Ethernet interface view
Layer 3 Ethernet subinterface view
VLAN interface view
Predefined user roles
network-admin
Parameters
ip-range start-ip-address to end-ip-address: Specifies the IP address range for which local proxy ARP is enabled. The start IP address must be lower than or equal to the end IP address.
Usage guidelines
Proxy ARP enables a device on a network to answer ARP requests for an IP address not on that network. With proxy ARP, hosts in different broadcast domains can communicate with each other as they do on the same network.
Proxy ARP includes common proxy ARP and local proxy ARP.
Common proxy ARP allows communication between hosts that connect to different Layer 3 interfaces and reside in different broadcast domains.
Local proxy ARP allows communication between hosts that connect to the same Layer 3 interface and reside in different broadcast domains.
If you execute this command multiple times, the most recent configuration takes effect.
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 VLAN-interface 2 for an IP address range.
<Sysname> system-view
[Sysname] interface vlan-interface 2
[Sysname-Vlan-interface2] local-proxy-arp enable ip-range 1.1.1.1 to 1.1.1.20
Related commands
display local-proxy-arp
proxy-arp enable
Use proxy-arp enable to enable proxy ARP.
Use undo proxy-arp enable to disable proxy ARP.
Syntax
proxy-arp enable
undo proxy-arp enable
Default
Proxy ARP is disabled.
Views
Layer 3 Ethernet interface view
Layer 3 Ethernet subinterface view
VLAN interface view
Predefined user roles
network-admin
Usage guidelines
Proxy ARP enables a device on a network to answer ARP requests for an IP address not on that network. With proxy ARP, hosts in different broadcast domains can communicate with each other as they do on the same network.
Proxy ARP includes common proxy ARP and local proxy ARP.
Common proxy ARP allows communication between hosts that connect to different Layer 3 interfaces and reside in different broadcast domains.
Local proxy ARP allows communication between hosts that connect to the same Layer 3 interface and reside in different broadcast domains.
Examples
# Enable proxy ARP on VLAN-interface 2.
<Sysname> system-view
[Sysname] interface vlan-interface 2
[Sysname-Vlan-interface2] proxy-arp enable
Related commands
display proxy-arp
ARP snooping commands
arp snooping enable
Use arp snooping enable to enable ARP snooping.
Use undo arp snooping enable to disable ARP snooping.
Syntax
arp snooping enable
undo arp snooping enable
Default
ARP snooping is disabled.
Views
VLAN view
Predefined user roles
network-admin
Examples
# Enable ARP snooping for VLAN 2.
<Sysname> system-view
[Sysname] vlan 2
[Sysname-vlan2] arp snooping enable
display arp snooping
Use display arp snooping to display ARP snooping entries.
Syntax
display arp snooping [ vlan vlan-id ] [ count ]
display arp snooping ip ip-address
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
vlan vlan-id: Displays ARP snooping entries for a VLAN. The vlan-id argument is in the range of 1 to 4094.
count: Displays the number of the ARP snooping entries.
ip ip-address: Displays the ARP snooping entry for the specified IP address.
Examples
# Display ARP snooping entries for VLAN 2.
<Sysname> display arp snooping vlan 2
IP Address MAC Address VLAN ID Interface Aging Status
3.3.3.3 0003-0003-0003 2 GE1/0/1 20 Valid
3.3.3.4 0004-0004-0004 2 GE1/0/2 5 Invalid
# Display the number of the ARP snooping entries.
<Sysname> display arp snooping count
Total entries: 2
Table 3 Command output
|
Field |
Description |
|
IP Address |
IP address in an ARP snooping entry. |
|
MAC Address |
MAC address in an ARP snooping entry. |
|
VLAN ID |
ID of the VLAN to which the ARP snooping entry belongs. |
|
Interface |
Input interface in an ARP snooping entry. |
|
Aging |
Aging time for an ARP snooping entry in minutes. If the card learns an ARP snooping entry from another card, the card cannot learn the aging time of the entry, and this field displays N/A. |
|
Status |
Status of an ARP snooping entry: Valid, Invalid, Collision. |
|
Total entries |
Number of ARP snooping entries. |
Related commands
reset arp snooping
reset arp snooping
Use reset arp snooping to delete ARP snooping entries.
Syntax
reset arp snooping [ ip ip-address | vlan vlan-id ]
Views
User view
Predefined user roles
network-admin
Parameters
ip ip-address: Deletes the ARP snooping entry for the specified IP address.
vlan vlan-id: Deletes ARP snooping entries for the specified VLAN. The value range for the vlan-id argument is 1 to 4094.
Usage guidelines
If you do not specify any option, the command deletes all ARP snooping entries.
Examples
# Delete ARP snooping entries for VLAN 2.
<Sysname> reset arp snooping vlan 2
Related commands
display arp snooping
ARP fast-reply commands
arp fast-reply enable
Use arp fast-reply enable to enable ARP fast-reply for a VLAN.
Use undo arp fast-reply enable to disable ARP fast-reply for a VLAN.
Syntax
arp fast-reply enable
undo arp fast-reply enable
Default
ARP fast-reply is disabled on a VLAN.
Views
VLAN view
Predefined user roles
network-admin
Examples
# Enable ARP fast-reply for VLAN 2.
<Sysname> system-view
[Sysname] vlan 2
[Sysname-vlan2] arp fast-reply enable
ARP direct route advertisement commands
arp route-direct advertise
Use arp route-direct advertise to enable ARP direct route advertisement.
Use undo arp route-direct advertise to disable ARP direct route advertisement.
Syntax
arp route-direct advertise
undo arp route-direct advertise
Default
ARP direct route advertisement is disabled.
Views
Interface view
Predefined user roles
network-admin
Examples
# Enable ARP direct route advertisement on Layer 3 Ethernet interface GigabitEthernet 1/0/1.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] arp route-direct advertise
