Re: [CCAMP] draft-ietf-ccamp-gmpls-g-694-lambda-labels and unique resource identification

[Lou Berger <lberger at labn.net>]

Richard,

Okay let me try again with a specific case.  If I have an rro or ero
that identifies the label (lambda) per your document, how does a node
know which laser the label corresponds to when all lasers in the system
are tunable?

Thanks,
Lou

On 10/29/2009 2:22 PM, Richard Rabbat wrote:
> sorry for the lag.
> do you want to describe your use-case further in terms of what you can't
> do and your proposed change?
> thanks,
> Richard.
> 
> On Thu, Oct 15, 2009 at 8:53 AM, Lou Berger <lberger at labn.net
> <mailto:lberger at labn.net>> wrote:
> 
>     Authors,
>            Have you given any additional thought on the repesentation of
>     tunable
>     lasers (and unique resource identification) beyond what is currently in
>     the draft? The current text is:
>       If the node has a tunable wavelength transponder, the tuning
>       wavelength is considered as a part of wavelength switching
>       operation.
> 
>     In the past, labels used for TE LSPs always represented a specific
>     resource that is uniquely identifiable by the node that allocates the
>     label and resource.  Such unique identification is important/required
>     for certan restart and other corner cases. Your current definition works
>     fine for fixed lasers that can only be mapped to a single fiber.  But,
>     the defined global label will not uniquely identify a resource on a node
>     when (a) tunable lasers are used, or (b) when a node supports multiple
>     fixed lasers that can be (optically) switched to a particular output
>     interface.
> 
>     What are your thoughts on how to provide such link-scoped unique
>     resource identification in the context of your draft?
> 
>     I don't think it'll be too difficult to address this critical point, and
>     see a couple of straightforward solutions if you'd like to discuss
>     off-line.
> 
>     Much thanks,
>     Lou
> 
> 
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