Gratuitous ARP in HA Failover

Gratuitous ARP in HA Failover

50209
Created On 09/26/18 13:54 PM - Last Modified 06/07/23 14:38 PM


Resolution


In the event of a failover in an HA pair, and a device transitions from a non-active state to active state, the following happens:

 

  1. A request is made to enable all layer 3 physical links.
  2. Two gratuitous ARPs (GARPs) are immediately sent.
  3. Eight GARPs are scheduled to be sent in 1 second intervals.

 

Note: The links may take up to 4 seconds to become active, so it's possible that not all GARPs reach the wire.

 

owner: panagent



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