Re: [Roll] [roll] #94: Why does DRO travel by multicast.

["roll issue tracker" <[e-mail]>]

#94: Why does DRO travel by multicast.

Changes (by jpv@…):

 * status:  new => closed
 * resolution:   => fixed


Comment:

 Resolution:
 --------------
 Because we want the stop flag in DRO to reach as many nodes as  possible.

 Discussion:
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 p14 :  A DRO message travels from the target to the origin via link-local
 multicast along the
   route specified inside the Address vector in the P2P-RDO.

 [Cedric]
 Why using multicast if you know every destinators ?
 Could we unicast packets to each destinators in the address vector ?

 [Mukul]
 DRO travels by link local multicast so that the nodes, that are on the
 temporary DAG but not necessarily on a discovered route, may know that the
 route discovery is over (via the stop flag) and there is no need to
 generate any more DIOs. This may lead to a significant reduction in the
 (unnecessary) DIOs generated. Only the routers on the discovered route do
 the multicast-based forwarding though.

 [Cedric2]
 Makes sense, thank's for clarification.
 This ticket can be closed.
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-- 
-----------------------------------+----------------------
 Reporter:  jpv@…                  |       Owner:  mukul@…
     Type:  defect                 |      Status:  closed
 Priority:  major                  |   Milestone:
Component:  p2p-rpl                |     Version:
 Severity:  Submitted WG Document  |  Resolution:  fixed
 Keywords:                         |
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Ticket URL: <http://trac.tools.ietf.org/wg/roll/trac/ticket/94#comment:1>
roll <http://tools.ietf.org/wg/roll/>