display arp track

Function

The display arp track command displays changes of outbound interfaces in ARP entries learned by a VLANIF interface.

Format

display arp track

Parameters

None

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

Usage Scenario

If the outbound interfaces change in ARP entries learned by a VLANIF interface, traffic may be interrupted. In this case, run the display arp track command to check changes of outbound interfaces and the change time.

Precautions

After the display arp track command is executed, changes of ARP entries are displayed in the following situations:

Outbound interfaces in dynamic ARP entries learned by the VLANIF interface change to other interfaces.
No outbound interface is specified in the static ARP entries. The outbound interfaces change to other interfaces.
Dynamic ARP entries or static ARP entries in which no VLAN ID and outbound interface are specified are deleted.

Changes of ARP entries cannot be displayed in the following situations:

ARP entries change on a non-VLANIF interface.
New ARP entries are learned.
The VLAN ID and outbound interface are manually specified in static ARP entries.

Example

# Display changes of outbound interfaces in ARP entries.

<HUAWEI> display arp track
Operate Flags: M - Modify, D - Delete 
-------------------------------------------------------------------------------
Op IP-Address  MAC-Address     VLAN   Old-Port   New-Port   System-Time
-------------------------------------------------------------------------------
M  10.1.1.1    0001-0001-0001  1000   GE0/0/1    GE0/0/2    2017-08-19 12:10:12
D  10.2.1.100  0003-0003-0003  300               GE0/0/3    2017-08-19 12:12:12

**Table 1** Description of the **display arp track** command output
Item	Description
Op	Operation code. M: Modify, indicating that the outbound interface changes. D: Delete, indicating that the ARP entry is deleted.
IP-Address	IP address in the ARP entry
MAC-Address	MAC address in the ARP entry
VLAN	ID of the VLAN to which the VLANIF interface belongs.
Old-Port	Original outbound interface in the ARP entry.
New-Port	New outbound interface in the ARP entry.
System-Time	System time when the outbound interface changes.