On Thu, Aug 31, 2023 at 2:53 PM Templin (US), Fred L <Fred.L.Templin=40boeing....@dmarc.ietf.org> wrote: > > -----Original Message----- > From: I-D-Announce <i-d-announce-boun...@ietf.org> On Behalf Of > internet-dra...@ietf.org > Sent: Thursday, August 31, 2023 2:52 PM > To: i-d-annou...@ietf.org > Subject: I-D Action: draft-templin-intarea-ipid-ext-04.txt > > Internet-Draft draft-templin-intarea-ipid-ext-04.txt is now available. > > Title: Identification Extension Options for the Internet Protocol > Author: Fred L. Templin > Name: draft-templin-intarea-ipid-ext-04.txt > Pages: 14 > Dates: 2023-08-31 > > Abstract: > > The Internet Protocol, version 4 (IPv4) header includes a 16-bit > Identification field in all packets, but this length is too small to > ensure reassembly integrity even at moderate data rates in modern > networks. Even for Internet Protocol, version 6 (IPv6), the 32-bit > Identification field included when a Fragment Header is present may > be smaller than desired for some intended uses. This specification > addresses these limitations by defining both an IPv4 header option > and an IPv6 Hop-by-Hop Option for Identification Extension.
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. 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 > i-d-annou...@ietf.org > https://www.ietf.org/mailman/listinfo/i-d-announce > > _______________________________________________ > Int-area mailing list > Int-area@ietf.org > https://www.ietf.org/mailman/listinfo/int-area _______________________________________________ Int-area mailing list Int-area@ietf.org https://www.ietf.org/mailman/listinfo/int-area
