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box-to-box redundancy and ARP question

damian.johnstone
Level 1
Level 1

‎05-05-2006 03:25 AM

In a box-to-box failover scenario are the MAC addresses of both active and standby CSS11503s supposed to match up? The reason I ask relates to an issue where without clearing the ARP cache on the Default GW (a PIX with a default ARP timeout of 240 minutes) all services were unreachable via the VIPs.

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2 Replies 2

Gilles Dufour
Cisco Employee
Cisco Employee

‎05-05-2006 10:53 AM

the addresses are not the same but the CSS sends a gratuitous arp upon failover to advertise the new mac-address.

Gilles.

damian.johnstone
Level 1
Level 1
In response to Gilles Dufour

‎05-19-2006 07:15 AM

Its more so an issue with the PIX firewalls ignoring the gratuitous arp broadcast and not update its ARP table until the arp timeout.

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