RE: Suggested Label Doubt

[Vishal Sharma <vsharma87@yahoo.com>]

Manoj,

The answer to your question is "Yes."

The reason is, the the purpose of the label set is to request subsequent nodes 
to
pick wavlengths from the set specified in the label set (for example, nodes may 
have
a limited wavelength translation capability, restricting them to certain 
wavelengths), since
previous nodes would have done so.

If, however, the setup request crosses a fully wavelength translation capable 
node,
that node could drop the label set. (Note, however, that if the node 
immediately following
this one has restrictions, that node could again introduce a new/different 
label set.)

-Vishal
On Friday, June 22, 2001 6:02 PM, manoj juneja 
[SMTP:manojkumarjuneja@hotmail.com] wrote:
> Vishal,
>
>              As u mentioned, that label set may get restricted in
> transit, but can the label set be completely dropped out at some
> transit node ? I mean to say if u reach at a node (transit node) which
> is capable of wavelength conversion (say any LAMBDA m to LAMBDA n i.e.
> any to any capability), Can this node drop the label set ?
>
> Regards,
> manoj.
>
>
>
>
> >From: Vishal Sharma <vsharma87@yahoo.com>
> >Reply-To: "v.sharma@ieee.org" <v.sharma@ieee.org>
> >To: "'manoj juneja'" <manojkumarjuneja@hotmail.com>,
> >"ccamp@ops.ietf.org"  <ccamp@ops.ietf.org>
> >Subject: RE: Suggested Label Doubt
> >Date: Fri, 22 Jun 2001 17:35:23 -0700
> >
> >Manoj,
> >
> >You think correctly. A label, by definition, has local significance
> >(between
> >adjacent
> >MPLS nodes).
> >
> >That the suggested label and  label set may have significance beyond a
> >single
> >MPLS hop is simply because the nodes choose to assert the same value for
> >subsequent hops as well.
> >And yes, technically both the suggested label and the label set may change
> >at each hop.
> >(For example, consider an optical network with no wavelength conversion
> >capability.
> >  A label set that represents the wavelengths that can be allocated [say,
> >lambda1 through lamba6] may, for example,
> >become more restricted as the request advances, since subsequent nodes may
> >not
> >have all of these
> >wavelengths available [only lambda2 and lambda4 may be available beyond
> >some
> >node for instance]).
> >
> >-Vishal
> >
> >On Friday, June 22, 2001 5:13 PM, manoj juneja
> >[SMTP:manojkumarjuneja@hotmail.com] wrote:
> > > Hi All,
> > >           Can Suggested Label change hop-by-hop (or even dropped at
> > > some transit node) like Label set may change hop-by-hop (or even
> > > dropped at some transit node) ? I think both should have a link by link
> > > significance as in case of label.
> > >
> > > Please clarify.
> > >
> > > Regards,
> > > manoj.
> > >
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