On 2013-06-12 14:36, Ole Troan wrote: > 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.
I am wondering why.... if your box cannot handle any headers, just forward the packet, decreasing the hopcount and that is just. Much more efficient, does not get in the slow path and some other box that is more capable will handle special requests. Unless the router in question knows what that HBH header will do (read: it was implemented when the definition of that header was defined) or what it should do with it, it won't be able to do anything with it anyway. Thus just ignoring/skipping it, heck not parsing any headers at all, will be quite fine... And if there is a HBH ever that a router should support, then only new router will support it anyway. Disclaimer: this is the model that sixxsd (used for the SixXS PoPs) does, and it seems to work like a charm; that is, no complaints yet ;) Greets, Jeroen -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
