vrrp track bfd gratuitous-arp send enable

Function

The vrrp track bfd gratuitous-arp send enable command enables a sub-interface to rapidly send gratuitous ARP packets during an active/standby switchover of a VRRP group triggered by its associated peer BFD session.

The undo vrrp track bfd gratuitous-arp send enable command cancels the configuration.

By default, a sub-interface is not enabled to rapidly send gratuitous ARP packets during an active/standby switchover of a VRRP group triggered by its associated peer BFD session.

Format

vrrp track bfd gratuitous-arp send enable

undo vrrp track bfd gratuitous-arp send enable

Only the S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-HI, S6730-H, S6730S-H, S6730-S, and S6730S-S support this command.

Parameters

None

Views

GE sub-interface view, MultiGE sub-interface view, XGE sub-interface view, 25GE sub-interface view, 40GE sub-interface view, 100GE sub-interface view, Eth-Trunk sub-interface view, VE sub-interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

On a network where association between a VRRP group and a peer BFD session is configured, when the peer BFD session on the backup detects a fault on the active link, the peer BFD session notifies the VRRP group of performing an active/standby switchover. The new master sends gratuitous ARP packets to its downstream Layer 2 device through the software protocol stack so that traffic is switched to the new master.

To speed up traffic switching, run this command to enable a sub-interface to rapidly send gratuitous ARP packets during an active/standby switchover of a VRRP group triggered by its associated peer BFD session. When the peer BFD session on the backup detects the fault on the active link, the hardware rapidly sends gratuitous ARP packets to its downstream Layer 2 device so that traffic is switched to the new master.

Prerequisites

The vrrp vrid virtual-router-id track bfd-session { bfd-session-id | session-name bfd-configure-name } peer command has been configured on the sub-interface.

Precautions

Each peer BFD session triggers only one VRRP group to send gratuitous ARP packets.

Example

# Enable gigabitethernet0/0/1.1 to rapidly send gratuitous ARP packets during an active/standby switchover of a VRRP group triggered by its associated peer BFD session.

<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1.1
[HUAWEI-GigabitEthernet0/0/1.1] vrrp vrid 1 track bfd-session 1 peer
[HUAWEI-GigabitEthernet0/0/1.1] vrrp track bfd gratuitous-arp send enable