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Cell Relay Retreat>MPLS-OPS Archive>month:2001-Jun> msg00359



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Label at bottom of stack vs somewhere else

  • From: Vikas D <vikdw@yahoo.com>
  • Date: Thu, 28 Jun 2001 00:22:10 -0700 (PDT)
  • Resent-Date: Thu, 28 Jun 2001 04:54:11 -0400
  • To: mpls-ops@mplsrc.com

All,

Is there *any* situation in which the behavior of a penultimate hop
or an egress router depends upon the absolute position of outermost
label.

Specifically, is there any case when the processing of packet
depends upon whether the S bit is 1 or 0 for the label being popped.

I guess as per MPLS RFCs, the processing is independent of the
hierarchy.  Just wanted to verify if there is a case, that calls for
a need to violate that.

- VD


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