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Cell Relay Retreat>MPLS WG Archive>month:2000-Dec> msg00409



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[IP-Optical] RE: GMPLS - Lable

  • From: Kireeti Kompella <kireeti@juniper.net>
  • Date: Wed, 20 Dec 2000 11:17:01 -0800 (PST)

> RSVP uses downstream-on-demand for label assignment. The upstream LSR
> does not keep free labels for downstream LSR. 

"Does not keep" is different from "cannot keep".  On point-to-point
links, the upstream LSR can easily do this.  If the upstream LSR is
motivated enough to use suggested labels, it makes sense to track
which are available.  Note that unlike "data labels", lambdas and
ports usage will be tracked carefully; i.e., the upstream LSR should
know which labels (ports) are free in any case.

Kireeti.