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negotiations in CR-LDP

  • From: Vasanthi Thirumalai <vasanthi@tellium.com>
  • Date: Wed, 23 Aug 2000 14:14:08 -0400
  • CC: mpls@UU.NET

Hi,
    In the example that you have given, LSR2 would modify the PDR(it may substitute it with a smaller value) and send the Label request to LSR3.

In general an LSR that cannot satisfy a negotiable traffic parameter request, replaces it with a smaller  value and propagates the Label request. Label Mapping carries the final negotiated value. The LSRs along the path, then adjust the resources they  reserved for the path, based on the values conveyed in  the Label Mapping message.

-Vasanthi

Ajay Malik wrote:
Hi,

  I have a question regarding negotiations in CR-LDP:
     LER--LSR1--LSR2---LSR3--LER

  if the LSR2 finds that sufficient resources are not available and the parameter
  values are negotiable what does it exactly does ?
    * does it modify the setup and sends it to LSR3 irrespective of anything ?
    * does it first negotiate with LSR1 ? how ? (take example of PDR in Delay
      sensitive service)

Ajay