Joe, >>>> an IPv6 router compliant with RFC2460 does not inspect the header chain. >>> >>> That cannot be true; there are headers after IPv6 but before fragmentation >>> that are hop-by-hop. >> >> with the exception of the HBH header, correct. I got tired of writing that >> each time I was repeating myself. >> the HBH is an issue to itself. expect those packets to be severely rate >> limited. > > There are three such headers that could come before fragmentation. They are > (in order): > > HBH > Destination Opts > Routing Header > > The DO is to support RH, e.g., where the DO options are examined at each hop > in the RH (it would appear only if RH is present). > > All of these options have to be copied for fragmentation; you would need to > copy everything up to the frag header. > > Again, RFC 2460 is already clear on this point: > > The Unfragmentable Part consists of the IPv6 header plus any > extension headers that must be processed by nodes en route to the > destination, that is, all headers up to and including the Routing > header if present, else the Hop-by-Hop Options header if present, > else no extension headers.
that's quite a different case. with source routing the packet is destined to the router itself. also note that RH0 is deprecated. cheers, Ole -------------------------------------------------------------------- IETF IPv6 working group mailing list [email protected] Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
