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Cell Relay Retreat>MPLS WG Archive>month:2001-Jul> msg00252



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[MPLS] Popping Multiple Labels

  • From: <wiseguy@cs.stanford.edu>
  • Date: Tue, 17 Jul 2001 12:05:34 -0700 (PDT)


Hi,

I was wondering if there are any possible scenarios in which
a node might pop multiple labels from the stack.  One case
I was thinking of is : a node is endpoint of a tunnel (T1) and
is also a penultimate hop for another tunnel (T2) and T2 is
tunneled over T1!  Maybe this is not a valid scenario but I
would like to check.

I appreciate any help.

thanks,
manish

PS: Scenario


  +-----+         +-------+               +-------+         +------+
  |     | ===~==  |       |  ====~~===    |       +---------+      |
  | L1  |         | L21   |               | L2n   |         | L3   |
  +-----+         +-------+               +-------+         +------+

                  <------------  T1 -------------->
         <--------------------------T2---------------------->