On Tue, 4 Dec 2018 15:17:33 -0500 Christopher Morrow wrote: > A solution might be to have a mode where a router may just ignore all > headers except the src/dst-ip and simply forward all packets, trusting > that the conversing adults will sort out problems with unknown/new/ > experimental headers or with a tortured ordering of headers (for > instance). Glad to hear you say that, because that's exactly what RFC 7045 envisions as the default forwarding behavior: Any forwarding node along an IPv6 packet's path, which forwards the packet for any reason, SHOULD do so regardless of any extension headers that are present [...] Recognizing that processing of Hop-by-Hop Options in the fast path is costly, RFC 8200 formally dropped the requirement for every router to process them by default: NOTE: While [RFC2460] required that all nodes must examine and process the Hop-by-Hop Options header, it is now expected that nodes along a packet's delivery path only examine and process the Hop-by-Hop Options header if explicitly configured to do so. What some of us would like to see is a statement in the draft that it's just fine to operate this way (Christian Huitema made that suggestion earlier in this thread, and so did I in my detailed last-call comments). Mike Heard
