There is another conversation in v6ops that mentioned that switching ASICs do not inspect beyond 40 bytes.
-as On 6/9/13 10:46 AM, Fernando Gont wrote: > Ray, > > On 06/08/2013 01:06 PM, Ray Hunter wrote: >> I was thinking something along the lines of: >> >> - The preferred length of a Hop by Hop extension header for optimized >> forwarding in hardware is always 16 octets long. >> >> - the Hop by Hop EH may be present exactly once, or not present, and is >> always transmitted directly after the IPv6 header (already the case in 2460) > > I'd say one should enforce a "each EH can be present at most once". > > ANd, me, I'd limit the EH chain to 1280 octets (at most) -- even that is > kind of irrational: 1280 is the IPv6 minimum MTU... so we'd be allowing > packets that are 100& overhead. > > Cheers, > -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------