Hi, > My question to th wg is: > > 1) Do we want to limit the size of the IPv6 header chain?
I think it is necessary yes. > 2) If so, which limit should we pick? I think there are two conditions here: - The full layer-4 header must be within this limit, and it must be in the first fragment (if fragmented at all) - The limit should be larger than what is currently used + some margin for stuff we forgot Take i.e. Figure 3 of http://www.cisco.com/en/US/technologies/tk648/tk872/technologies_white_paper0900aecd8054d37d.html as example. It shows a Mobile-IPv6 packet: IPv6 header (40 octets) + Routing header (24 octets) + Destination Options header (24 octets) + Fragmentation header (8 octets). Add to that a basic TCP header (20 octets) and we arrive at 116 octets. So a limit of 128 would currently probably be ok, but I personally would prefer the limit to be a bit higher just to have some extra margin. Cheers, Sander -------------------------------------------------------------------- IETF IPv6 working group mailing list [email protected] Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
