The MPLS WG Archive

[Rohit Chhapolia <rohit@globespan.net>]

To determine the ingress node, "Extended Tunnel ID" is useful.

>From RSVP-TE draft,

      Extended Tunnel ID

         A 32-bit identifier used in the SESSION that  remains  constant
         over  the  life  of  the  tunnel.   Normally  set to all zeros.
         Ingress nodes that wish to narrow the scope of a SESSION to the
         ingress-egress  pair  may  place  their  IPv4 address here as a
         globally unique identifier.


Tan Su Wei wrote:
> 
> Dear all,
> 
>     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
> 
>         Thanks for any reply.
> 
> Regards
> Tan Su Wei

-- 
Rohit Chhapolia
Globespan, Inc.
mailto:rohit@globespan.net
http://www.globespan.net