Which is definitely not true in general. Some do that, many do not inspect beyond 128, some go further.
On Mon, Jun 10, 2013 at 8:09 AM, Arturo Servin <arturo.ser...@gmail.com>wrote: > > 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 > -------------------------------------------------------------------- >
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