Re: Interesting BFD discussion on reddit

I wonder if Trio, EZChip and friends could do SHA in NPU, my guess is yes they could, but perhaps there is even more appropriate hash for this use-case. I'm not entirely convinced doing hash for each BFD packet is impractical.

[0] http://www.ietf.org/id/draft-mahesh-bfd-authentication-00.txt

You might want to take a look at: http://www.ietf.org/proceedings/89/slides/slides-89-mpls-9.pdf Look at the slides 11 onwards. Doing HMAC calculation for each packet adversely affects the number of concurrent sessions that can be supported. Glen.

-- ++ytti