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Cell Relay Retreat>MPLS WG Archive>month:2000-May> msg00327



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can egress know the ingress of a packet?

  • From: "Pathangi N Janardhanan" <janar@netlab.hcltech.com>
  • Date: Tue, 30 May 2000 08:47:45 +0530

Hi,

>     I'd a doubt on :
>         In a mpls network domain, for a particular ingress-egress
pair
> with multiple LSPs in between them, is it possible when a packet
reach
> the engress node, the engress node will know the following:
>         i. ) the ingress node
>         ii.) the lsp it travel
>
  Either the label on the incoming packet or the combination of label
and interface of the
incoming packet can be used to identify the ingress/LSP of the
incoming packet.

Thanks
Jana