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Forum Discussion

Ron_Peters_2122's avatar
Ron_Peters_2122
Icon for Altostratus rankAltostratus
Sep 15, 2016

ARP/MAC Tables Not Updating on Core Switches After F5 LTM Failover (GARP Issue?)

We have two F5 LTM 5250v appliances configured with 2 vCMP instances each in an HA pair (Active/Standby). Each F5 5250v has a 10G uplink to two core switches (Cisco Nexus 7010) configured as an LACP ...
application delivery
arp
fail over
gratuitous arp
LTM
Kai_Wilke's avatar
Kai_Wilke
Icon for MVP rankMVP
Sep 23, 2016

Hi Ron,

 

I've to second Tatmotiv's opinion to enable MAC masquerading on your Traffic-Groups.

 

We're sucessfully running this setup on VPC enabled Nexus devices. Our switch CAM tables will detect the failover event immediately on the very first received GARP packet and perform a single MAC flap.

 

Cheers, Kai