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failover-delay

 

Syntax

Hierarchy Level

Release Information

Statement introduced in Junos OS Release 11.3.

Description

If you configure multiple VRRP groups on an interface (using multiple VLANs), traffic for some of the groups might be briefly dropped if a failover occurs. This can happen because the new primary must send gratuitous ARP replies for each VRRP group to update the ARP tables in the connected devices, and there is a short delay between each gratuitous ARP reply. Traffic sent by devices that have not yet received the gratuitous ARP reply is dropped (until the device receives the reply and learns the MAC address of the new primary).

If you configure a failover delay, the new primary delays sending gratuitous ARP replies for the period that you set. This allows the new primary to send the ARP replies for all of the VRRP groups simultaneously.

Options

milliseconds—Specify the failover delay time, in milliseconds.

Range: 50 through 2000

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.

Related Documentation