Re: Label Set and Suggested Label

["manoj juneja" <manojkumarjuneja@hotmail.com>]

Suresh,
        The SDH/SONET case u are talking of is not mentioned in GMPLS
drafts. But the O-UNI draft clearly talks about this case. I think the
GMPLS draft also need to have this information.

Regards,
manoj.



>From: Suresh Katukam <skatukam@cisco.com>
>To: manoj juneja <manojkumarjuneja@hotmail.com>
>CC: ccamp@ops.ietf.org
>Subject: Re: Label Set and Suggested Label
>Date: Fri, 29 Jun 2001 18:06:35 -0700
>
>
>Manoj,
>
> >         In the GMPLS drafts, it is mentioned that the use of label set
> > is in the following cases :
> >
> >            a) End equipment is only capable of transmitting and
> >               receiving on a small set of wavelengths.
> >            b) There are sequence of interfaces which can't support
> >               wavelength conversion.
> >            c) It is desireable to limit the amount of wavelength
> >               conversion to reduce the distortion on the optical
> >               signals.
> >            d) Two ends of a link support different sets of wavelengths.
> >
> > All the above four points are valid only in case LSP encoding type is
> > lambda. Does this mean if a label set is received in cases where LSP
> > encoding type is other than Lambda, it should be ignored or considered
> > protocol error ?
>
>I am not sure whether it is the intention of GMPLS authors to list
>all possible scenerios under which a label set is used. There are
>other scenerios under which label set can be used. In TDM, for example,
>one may want to use same time slot (for BLSRs) assigned along the
>entire BLSR segment. In such a scenerio, BLSR headend lists all available
>labels and forwards the PATH message. Each node in BLSR knows what
>label to use when it receives a RESV message.
>
>There may be other reasons too. In anycase, you should not consider
>that to be a protocol error.
>
>Thanks,
>Suresh
> >
> > What about the suggested Label ? Is it also defined to take care of
> > specific LSP encoding type ?
> >
> > Please Clarify.
> >
> > Regards,
> > manoj.
> >
> > _________________________________________________________________
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