Will BFD (Bidirectional Forwarding Detection) cause extra CPU load?

[3alee]

Hello all

Could anyone advise if enabling BFD (Bidirectional Forwarding Detection) for BGP on a Cisco 7609 Router causes extra loading on the CPU or impact on Router performance?

Thanks.

[Edison Ortiz]

Versions prior to 15.1(2)S run BFD in software so depending on the number of BFD sessions, it will affect the CPU hence impacting the router performance.

http://www.cisco.com/en/US/docs/routers/7600/install_config/ES40_config_guide/es40_chap4.html#wp1720514

Regards,

Edison

[Joseph W. Doherty]

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Posting

I've used BFD on 6500, and confirming Edison's reference, have seen CPU impacted, extent of impact also has much to do with BFD frequency.