(Optional) Enabling Passive ARP
Context
When passive ARP is enabled and the backup device in a VRRP group receives ARP Request packets destined for the virtual IP address, the backup device does not learn ARP entries. When a link or device fault causes a VRRP active/standby switchover, the backup device switches to the master device to transmit service traffic. The new master needs to learn user-side entries before forwarding service traffic, causing a short service interruption. Passive ARP can address this issue.
Only the S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730-H, S6730S-H, S6730-S, and S6730S-S support this function.
Procedure
- Run system-view
The system view is displayed.
- Run arp learning passive enable
Passive ARP is enabled.
By default, passive ARP is disabled.
When passive ARP is enabled and the backup device in a VRRP group receives ARP Request packets destined for the virtual IP address, the backup device learns ARP entries. Even if the VRRP active/standby switchover is performed, the new master device does not need to learn ARP entries. The new master device can rapidly forward service traffic, ensuring traffic continuity.