[armd] Multicast Issues in ARMD Scope

Benson Schliesser <bschlies@cisco.com> Sun, 04 March 2012 23:08 UTC

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From: Benson Schliesser <bschlies@cisco.com>
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Date: Sun, 04 Mar 2012 15:08:22 -0800
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Subject: [armd] Multicast Issues in ARMD Scope
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ARMD participants -

At the last ARMD meeting at IETF82 in Taipei, a few participants made comments about multicast. Specifically, I recall Dino asking if it was in the scope of ARMD's charter. More recently, there has been a discussion on this list about multicast in datacenters. In response, a draft was posted at http://tools.ietf.org/html/draft-mcbride-armd-mcast-overview-00 that discusses various ways that multicast is used in datacenters.

As co-chairs, Linda and I are interested in whether the WG has any work to do on this topic. For instance, draft-mcbride-armd-mcast-overview suggests there might be "address resolution for non ARP/ND multicast traffic".

My view, in absence of WG feedback, is that ARMD's scope does not include "how to run multicast in a datacenter" - that might be more appropriate for the DC-Ops mailing list at this time. But if there are multicast-related problems that can be described in terms of address resolution, then ARMD should discuss them. For instance (if I may speculate) there might be issues with overlay address resolution and/or group-to-MAC mappings. Can you help me understand what those might be?

Your feedback and comments are appreciated.

Cheers,
-Benson and Linda