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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
tatmotiv's avatar
tatmotiv
Icon for Cirrostratus rankCirrostratus
Sep 23, 2016

Same here. I was also sceptical regarding MAC masquerading, but upon experiencing the above mentioned ARP problems in the nexus infrastructure (which were somehow related to fabric-path if I remember correctly), I converted all (60+) traffic-groups on my devices to MAC masquerading and didn't have any bad experiences. We are also connecting to Nexus switches using vpc (albeit N5Ks as spines, being cross-connected via N7Ks as hubs) and we are also using vcmp (on Viprion though, not 5250).