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Cell Relay Retreat>MPLS WG Archive>month:2002-Jun> msg00129



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target ldp question:

  • From: Carlos Patriawan <carlos_mpls@yahoo.com>
  • Date: Fri, 21 Jun 2002 14:26:41 -0700 (PDT)

The requirement for router("r" in below ase) between 2
targeted session peer is capable of mpls forwarding. 

Question: in the case where R2 as the egress for FEC x
and R2 assigns label 0 as label binding for fec x on
its session with R1 ;  now  If transit LSR 'r'
forward the mpls frame(w/ label 0) to R1, does it
violate the RFC since RFC says LSR has to pop mpls
frame w/ label 0 ?


carlos


----
Jay Karthik wrote:

   Yes, R2 will send out label mappings to R1,
provided the method of label
   distribution is downstream unsolicited. (This is
regardless of whether R1
   initially sends R2 the label mappings for the
corresponding FECs)

   Jay

   At 12:58 PM 6/21/02 -0700, Srikrishna Venkataraman
wrote:
   >Hi
   >
   >I have a configuration as shown below:
   >
   >R1-----------R--------R2
   >
   >There is an extended session between R1 & R2.
   >R2 learns of New routes from R1 through the middle
   >router.
   >Will R2 send out labels for the new routes to R1?
   >
   >
   >thanks

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