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Cell Relay Retreat>MPLS WG Archive>month:2005-Jun> msg00020



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[mpls] MPLS multicasts

  • From: Eric Rosen <erosen@cisco.com>
  • Date: Fri, 17 Jun 2005 11:28:38 -0400
  • Cc: mpls@ietf.org
  • User-Agent: EMH/1.14.1 SEMI/1.14.3 (Ushinoya) FLIM/1.14.3(Unebigoryōmae) APEL/10.3 Emacs/21.3(sparc-sun-solaris2.8) MULE/5.0 (SAKAKI)


Vijay> So  far, when  LSRs use  downstream allocation  policy the  LSR which
Vijay> interprets the  received label  in the MPLS  packet would be  the one
Vijay> which allocated that label.The  downsteam could allocate labels based
Vijay> on some methodology to optimise its lookup/ interpretation of labels.

Vijay> For upstream allocation, since the label is allocated by the upstream
Vijay> LSR, should  there be some means  of negotiating the  label space for
Vijay> upstream allocation between the  upstream and the one/many downstream
Vijay> neighbors to  arrive at  a mutually agreeable  label space/allocation
Vijay> policy.

This is a  valid problem; there needs  to be some means of  ensuring that an
upstream-assigned label is interpretable by all the downstream systems. 



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