Wednesday, April 24, 2019

Recommended sub-ms HSRP timers?

Are there any recommendations on how long to go with hsrp timers?

We have two ASR's connected to same switch being used as the gateway for a VoIP solution which needs to have as fast gateway failover as possible to prevent audio loss during a service event.

EDIT:: I've just read that you can now enable bfd with hsrp - https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipapp_fhrp/configuration/15-mt/fhp-15-mt-book/fhp-hsrp-bfd.html

Anyone done that? How low can I go with BFD in this situation? I currently use 3x300ms on my wan links with bgp so surely I can go much lower on a directly connected Lan setup?



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