I think the argument sounds reasonable given that the intent of draft-ietf-6man-exthdr is to standardize the IPv6 extension headers that might get proposed in the future.
Kam On Tue, Sep 28, 2010 at 5:04 AM, Bhatia, Manav (Manav) < manav.bha...@alcatel-lucent.com> wrote: > Hi Suresh, > > > It is not clear to me what the problem is. Please state the > > problem you > > are trying to solve and why draft-ietf-6man-exthdr does not meet the > > purpose. We can then work together to get the issue(s) fixed. > > The draft > > is in its current state because it solves the following problems > > > > *) Need for a standardized format for new extension headers (for > > efficient parsing and for middlebox skipping) > > *) Need to conserve protocol number space (1 allocation for all new > > extension headers vs. 1 allocation per new extension header) > > *) Need to differentiate new extension headers from new transport > > protocols (non-GIEH next header value==>New transport protocol) > > Ok, so this clears one doubt that I had which was that we would use GIEH > for all new allocations (even new transport protocols). Patently, this is > not the case and it will only be used for new v6 extension headers. This > sounds good! > > My concern with the current format is that it does not help in > incrementally introducing new v6 extension headers. I would like to add the > following to the list of problems that GIEH currently solves: > > *) Some Hdr Options that indicates what a processing node MUST do when it > does not recognize the extension header its trying to process > (drop/pass/etc). We cannot necessarily assume that it will always be the end > node that's trying to process an extension header. You could also have some > intermediate node processing extension headers and what if it does not > understand them? It (or the end node) could either ignore this (indicated in > the Hdr Option) or it could raise hell and drop the packet (again indicated > in the Hdr Options). > > Thanks, Manav > > > > > Thanks > > Suresh > > > > > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > ipv6@ietf.org > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 > -------------------------------------------------------------------- >
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