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Re: [CCAMP] Generalized Labels for the Flexi-Grid in LSC Label Switching Routers

"Gabriele Maria Galimberti (ggalimbe)" <ggalimbe@cisco.com> Mon, 03 February 2014 14:48 UTC

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From: "Gabriele Maria Galimberti (ggalimbe)" <ggalimbe@cisco.com>
To: "huubatwork@gmail.com" <huubatwork@gmail.com>, Ramon Casellas <ramon.casellas@cttc.es>, Oscar González de Dios <ogondio@tid.es>
Thread-Topic: [CCAMP] Generalized Labels for the Flexi-Grid in LSC Label Switching Routers
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Date: Mon, 03 Feb 2014 14:48:21 +0000
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Subject: Re: [CCAMP] Generalized Labels for the Flexi-Grid in LSC Label Switching Routers
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Thanks Huub,

At this point we have to options:

1) update the IETF draft to m = 9 bits  (note this m value range covers
the whole spectrum if the granularity is 12.5GHz.)
2) propose to ITU-T Q6 to amend the G.697 (m from 9 to 16 bits) and modify
the IETF draft to m = 16 bits.

Regards, 

Gabriele




Gabriele Galimberti
Technical Leader
Cisco Photonics Srl


Via Philips, 12
20900 - Monza (MI)
Italy
www.cisco.com/global/IT/ <http://www.cisco.com/global/IT/>

ggalimbe@cisco.com
Phone :+39 039 2091462
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On 2/3/14 3:25 PM, "Huub van Helvoort" <huubatwork@gmail.com> wrote:

>Hola Ramon,
>
>G.694.1 does not define a maximum value for "m".
>
>However G.697 gives in Appendix V.1: Wavelength ID.
>"m" = 9 bits (m is encoded as a 9-bit unsigned integer).
>
>Regards, Huub.
>
>
> >> I am happy if we don't need to do so. But is this not better than
>>> defining/ extending a new label format when ITU-T changes the data
>>>plane?
>>
>> Dear all,
>>
>> I may be missing something (apologies in advance if it is the case) and
>> since I don't have them here right now, for the sake of this discussion,
>> maybe could anyone point to the relevant part of the document(s) e.g.
>> G.694.1 / G.872 etc. where it is said that the value of m is bound to
>>256?
>> We are aware of the concept of frequency slot, nominal central
>> frequencies (n, and their values) and the concept of frequency slot
>> width, but I cannot recall now such a bound.
>>
>> Thanks
>> R.
>>
>
>
>-- 
>*****************************************************************
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