Dear Pete,
multicast mobility management is a route adaptation problem. As in the
unicast case, mobility can only be treated by routing dynamics in
trivial cases (re-connect of a tunnel, re-association with next hop).
Otherwise it is unwise to delegate mobility adaptation to routing
protocols (-> OSPF, BGP ...).
Accordingly, if DMM distributes mobility operations, handover management
should foresee easy interconnects to previous distribution trees - both
for receivers and for mobile multicast sources.
I guess, if DMM people are careful, this is not a world-class item and
can be treated along the lines of unicast solutions - an isolated
multicast protocol treatment (as has been previously proposed from
MULTIMOB folks) seems inappropriate. In core PMIP, multicast treatment
has turned out to work out simply (-> RFC6224).
Thus my argument: talk to the multicast guys before adopting a solution
... and make the rest an easy game.
Cheers,
Thomas
On 12.11.2012 21:39, Peter McCann wrote:
jouni korhonen wrote:
Folks,
This mail is to kick off the discussion on multicast requirement(s)
for the draft-ietf-dmm-requirements-02 document. I hope we can nail
down the essential multicast requirement(s) as soon as possible.
To me, multicast in a DMM environment means joining multicast
groups directly from access routers. It means re-joining the
multicast tree from a new access router after handover. I would
hope that we can use existing MLD protocols between the MN and
its first hop AR to accomplish this.
-Pete
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--
Prof. Dr. Thomas C. Schmidt
° Hamburg University of Applied Sciences Berliner Tor 7 °
° Dept. Informatik, Internet Technologies Group 20099 Hamburg, Germany °
° http://www.haw-hamburg.de/inet Fon: +49-40-42875-8452 °
° http://www.informatik.haw-hamburg.de/~schmidt Fax: +49-40-42875-8409 °
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