The MPLS WG Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] [mpls] Unique Identififcation of LSP
I believe we should add these observations:
- this only applies to this particular signalling protocol;
- it does not apply in the traffic data-plane. That is, one does
not have such information here, just a single (20 bit) forwarding label
that can be changed on each link connection and which is proxying for
some distant LSP termination point. This has implications wrt
identifying/distinguishing misconnectivity between LSPs..... noting that
this can occur in both a horizontal sense (ie between LSPs created at
the same level in a nested stack) and a vertical sense (ie between LSPs
created at different levels in the stack).....be these generated by the
same or different signalling protocols.
regards, Neil
> -----Original Message-----
> From: George Swallow [mailto:swallow@cisco.com]
> Sent: 29 November 2006 18:53
> To: Anergy Virt
> Cc: mpls@lists.ietf.org
> Subject: Re: [mpls] Unique Identififcation of LSP
>
>
> > I have read that the 5-tuple {tunnel-endpoint address,tunnel-ID,
> > extended tunnel-ID, sender address, and LSP ID} can
> uniquely identify
> > an LSP. My question is it locally unique between two nodes
> or globally
> > unique identifcation
> >
> > A----B-----C------E
> > \ /
> > D
> >
> > For example two LSPs are set up from A to E via the same
> tunnel. i.e.
> > the have same end points and same path ABDE. Will the 5
> tuple uniquely
> > identify any LSP across any two nodes e.g. B and D? Will the values
> > remain same for this LSP across two other nodes in the path
> e.g. C and
> > E?
>
> Yes, provided that the extended tunnel ID is a globally
> unique id. (Normally this is set to the head-end's router ID).
>
> ...George
>
> ==============================================================
> ==========
> George Swallow Cisco Systems
> (978) 936-1398
> 1414 Massachusetts Avenue
> Boxborough, MA 01719
>
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