Interesting BFD discussion on reddit

Mon Feb 16 03:25:17 UTC 2015

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> 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.
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> [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.

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