Gratuitous ARP in HA Failover

by nrice on ‎05-14-2010 05:08 PM - edited on ‎09-10-2015 03:29 PM by (7,676 Views)

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 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

by indup089
on ‎09-19-2013 06:21 AM

Please keep in mind the GARPs are only send for IPs configured on the interfaces, not for IPs used in NAT-rules (DNAT, Bi-NAT)

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