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[MPLS] Popping Multiple Labels

  • From: "Jiang, Donghua (Donghua)" <djiang1@lucent.com>
  • Date: Tue, 17 Jul 2001 16:30:53 -0400
  • Cc: "'mpls@uu.net'" <mpls@UU.NET>


Manish,

I could not see why it is not possible.

Regards,
Jane
-----Original Message-----
From: wiseguy@cs.stanford.edu [mailto:wiseguy@cs.stanford.edu]
Sent: Tuesday, July 17, 2001 12:06 PM
To: mpls@UU.NET
Subject: [MPLS] Popping Multiple Labels



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---------------------->