Re: [IPv6] FW: I-D Action: draft-templin-intarea-ipid-ext-04.txt

Tom, a correction:

> This started out as a destination option *after* the Fragment header but *before*
> the Routing header according to the order stipulated in RFC8200.

I meant a destination option *before* both the routing and fragment headers per
Section 4.1 of RFC8200. But regardless, I now still do want to use hop-by-hop.

Fred

> -----Original Message-----
> From: Templin (US), Fred L
> Sent: Friday, September 01, 2023 8:11 AM
> To: 'Tom Herbert' <[email protected]>; Templin (US), Fred L <[email protected]>
> Cc: [email protected]; [email protected]
> Subject: Re: [IPv6] [Int-area] FW: I-D Action: draft-templin-intarea-ipid-ext-04.txt
> 
> Tom, see below:
> 
> > Hi Fred,
> >
> > I don't see how the Hop-by-Hop Option can work. In IPv6, fragmentation
> > is always end to end so a Hop-by-Hop Option really isn't appropriate.
> > It should be a Destination Option, but then we'd have to have DestOps
> > before the Frag header but after any Routing Header which would
> > diverge from the recommended EH ordering in section 4.1 of RFC8200.
> > Also, it seems the high order bits of the option type can't be 00
> > (presumably the option must be processed in order to correctly perform
> > reassembly), if this is done in a Hop-by-Hop Options then an
> > intermediate node may drop the packet even though it doesn't care
> > about fragmentation.
> 
> This started out as a destination option *after* the Fragment header but *before*
> the Routing header according to the order stipulated in RFC8200. But, then I
> realized that I wanted to enable network fragmentation for IPv6 and for that
> I needed a hop-by-hop option to tell intermediate IPv6 hops that recognize
> the option that fragmentation is permitted. This document updates RFC8200.
> 
> Fred
> 
> > Tom
> >
> > >
> > > The IETF datatracker status page for this Internet-Draft is:
> > > https://datatracker.ietf.org/doc/draft-templin-intarea-ipid-ext/
> > >
> > > There is also an HTMLized version available at:
> > > https://datatracker.ietf.org/doc/html/draft-templin-intarea-ipid-ext-04
> > >
> > > A diff from the previous version is available at:
> > > https://author-tools.ietf.org/iddiff?url2=draft-templin-intarea-ipid-ext-04
> > >
> > > Internet-Drafts are also available by rsync at:
> > > rsync.ietf.org::internet-drafts
> > >
> > >
> > > _______________________________________________
> > > I-D-Announce mailing list
> > > [email protected]
> > > https://www.ietf.org/mailman/listinfo/i-d-announce
> > >
> > > _______________________________________________
> > > Int-area mailing list
> > > [email protected]
> > > https://www.ietf.org/mailman/listinfo/int-area
> >
> > --------------------------------------------------------------------
> > IETF IPv6 working group mailing list
> > [email protected]
> > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6
> > --------------------------------------------------------------------