An interesting draft Toerless. From a background POV it is worth noting ISO 8473 which is in deployment with multi-type variable length address.
It is also worth noting that SA is different from DA to the extent that it may not belong in the network layer header of the outgoing packet. The SA is arguably a function of the payload and the application. Indeed some MPLS OAM solutions do just that by making the return address implicit in the arrival LSP, or a parameter in a payload TLV. SA as in IP is arguably just a convenience for a simplified method of operating an application. Stewart Sent from my iPad > On 13 Jul 2021, at 00:05, Toerless Eckert <[email protected]> wrote: > Dear Int-area > > As attached below, i have written up an idea about why and how variable-length > addresses in the network layer would be useful for many limited domain > internetworks, > but also how they could provide a simple and easily extensible framework to > add additional semantics (the likes of multicast, BIER, ICN), and also make > it easier > to express the programmability that SRv6 introduced. > > Would very much welcome discussion/feedback, and will be asking for a slot > to present/discuss this int-area 111. > > Note that the -00 writeup is mostly inspirational for what i think the cool > things one could do with it are and to explain the concepts. > > Obviously, if/when there is interest in this > direction, the harder work of figuring out how to best introduce this > incrementally, and ideally backward compatible into existing networks wold > be the next big set of items to work out. > > Cheers > Toerless > > On Mon, Jul 12, 2021 at 01:00:25PM -0700, [email protected] wrote: >> A new version of I-D, draft-eckert-intarea-functional-addr-internets-00.txt >> has been successfully submitted by Toerless Eckert and posted to the >> IETF repository. >> >> Name: draft-eckert-intarea-functional-addr-internets >> Revision: 00 >> Title: Functional Addressing (FA) for internets with Independent >> Network Address Spaces (IINAS) >> Document date: 2021-07-12 >> Group: Individual Submission >> Pages: 30 >> URL: >> https://www.ietf.org/archive/id/draft-eckert-intarea-functional-addr-internets-00.txt >> Status: >> https://datatracker.ietf.org/doc/draft-eckert-intarea-functional-addr-internets/ >> Htmlized: >> https://datatracker.ietf.org/doc/html/draft-eckert-intarea-functional-addr-internets >> >> >> Abstract: >> Recent work has raised interest in exploring network layer addressing >> that is more flexible than fixed-length addressing as used in IPv4 >> (32 bit) and IPv6 (128 bit). >> >> The reasons for the interest include both support for multiple and >> potentially novel address semantics, but also optimizations of >> addressing for existing semantics such as unicast tailored not for >> the global Internet but to better support private networks / limited >> domains. >> >> This memo explores in the view of the author yet little explored >> reasons for more flexible addresses namely the problems and >> opportunities for Internetworking with Independent Network Address >> Spaces (IINAS). >> >> To better enable such internetworks, this memo proposes a framework >> for a Functional Addressing model. This model also intends to >> support several other addressing goals including programmability and >> multiple semantics. >> >> >> >> >> The IETF Secretariat > > -- > --- > [email protected] > > _______________________________________________ > Int-area mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/int-area _______________________________________________ Int-area mailing list [email protected] https://www.ietf.org/mailman/listinfo/int-area
