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Re: [Roll] [6lo] Source-Routed Multicast

Michael Richardson <mcr+ietf@sandelman.ca> Tue, 04 November 2014 02:18 UTC

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From: Michael Richardson <mcr+ietf@sandelman.ca>
To: Carsten Bormann <cabo@tzi.org>
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Cc: Andrzej.Duda@imag.fr, roll@ietf.org, bier@ietf.org, 6lo@ietf.org
Subject: Re: [Roll] [6lo] Source-Routed Multicast
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Carsten Bormann <cabo@tzi.org> wrote:
    > In Hawaii, there will be a BOF about a multicast forwarding control
    > scheme where a router on the way prefixes a multicast packet with a
    > special header that tells downtree routers where to forward the
    > multicast — Bit Index Explicit Replication, or BIER.

    > While BIER appears to be very focused on a carrier or datacenter
    > perspective (see draft-kumar-bier-use-cases and the other
    > draft-*-bier-*), there are applications in constrained node networks
    > that would benefit from source-routed multicast.

I take your point.

    > With its current focus, I don’t think the BIER BOF itself is the right
    > place to have a technical discussion about this.

On the contrary, I think it is important at a BOF for this topic to be
brought up, if ONLY for it to be CLEARLY ruled out of scope.

    > There is no ROLL meeting in Hawaii.
    > The 6lo agenda is almost full.

ROLL would have to be rechartered to work on it; this is not to say that this
could not happen, but rather to say that even if we were meeting, discussing
it might be out of scope anyway.

Having said that, this thread is most welcome.

    > Should we do this in a side meeting?  (If we do this before Tuesday, we
    > can at least report in 6lo — if we do it on Sunday, we might even have
    > an opinion to air during the BIER BOF.)

I abhor "side meetings" --- either have a proper BOF in a room, or get a
bunch of beers is my opinion.

--
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
IETF ROLL WG co-chair.    http://datatracker.ietf.org/wg/roll/charter/

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