On Apr 20, 2010, at 15:42, Suresh Krishnan wrote: > > Simple. All future IPv6 extension headers will use the same next header value > (the one allocated for the GIEH). Anything else can be considered a unknown > upper layer header.
That's proposed informally in the draft, but it doesn't appear to be formalized in any way, which is why I wasn't sure that it would be safe for packet analyzers to assume they could identify all the extension headers. (Grmf. And I'm nominally a co-author on the draft.) I'd say there are two changes we should make to Section 6, IANA Considerations, in the next revision: + instruct IANA to reserve GIEH sub-type values for experimental purposes and cite RFC 3692. + instruct IANA to require a *separate* IETF standards action to allow IPv6 extension headers to be numbered from the assigned protocol number database *before* assigning any such numbers to a new extension header. -- james woodyatt <j...@apple.com> member of technical staff, communications engineering -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
