Stuart, > On Jul 2, 2025, at 12:12 PM, Stuart Cheshire > <cheshire=40apple....@dmarc.ietf.org> wrote: > > On Apr 8, 2025, at 05:03, Nate Karstens wrote: > >> Chairs, >> This draft was discussed by pim during IETF 118 & 120 and intarea during >> IETF 121 & 122. There have also been some reviews on the mailing list. Would >> this be an appropriate time to consider adoption by the intarea WG? >> https://datatracker.ietf.org/doc/draft-karstens-intarea-multicast-application-port/ >> Regards, >> Nate > > Following up on this request... > > Can we have a few minutes of agenda time in the Internet Area Working Group > meeting in Madrid to remind people about this work and initiate a call for > working group adoption? > > In 1997 at the SIGCOMM Conference in Cannes, for the humorous “Outrageous > Opinions” evening session I proposed that IP multicast should not use UDP but > should instead use “MDP” (Multicast Datagram Protocol) which is like UDP but > without port numbers. Of course, by then it was already too late to make such > a change. > > Then, 27 years later, Nate Karstens proposed that IP multicast should use > UDP, but with a single reserved “dummy” placeholder value where the > destination port would go for a unicast packet. (If you are unclear why the > UDP destination port is nonsensical for a multicast packet, please read the > draft.) This is an inspired solution to what I was thinking in 1997, but done > in a way that is practical and actually deployable. > > Nate’s proposal is: > * Architecturally superior to today’s situation > * Solves a real problem of port allocation > * The draft is an easy read -- just two pages of actual content > * The idea is simple > * The idea is incrementally deployable > - Applications can use it today with existing networking APIs > - Future updates to APIs can add protections to prevent misuse of this > reserved pseudo-port > > Please, let’s adopt this.
I read the draft and support its adoption. I suggest that the adoption call start soon (like this week) and conclude at the Int Area meeting in Madrid. Bob > > Stuart Cheshire > > <https://datatracker.ietf.org/doc/html/draft-karstens-intarea-multicast-application-port> > _______________________________________________ > Int-area mailing list -- int-area@ietf.org > To unsubscribe send an email to int-area-le...@ietf.org
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