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

[Loa Andersson <[e-mail]>]

Adrian,

Do you say that even though the size required Q6/15 would fit in 8 bits
we can as well reserve 16 bits now to make sure that we can expand in
the future.

I do not have any problem with that, unless there is a intended use of
the reserved field.

/Loa

On 2014-01-31 19:44, Adrian Farrel wrote:
> Hi Gabriele,
>
> IIRC this topic has come up in various discussions.
> I think the discussion ran aground when we tried to understand what ITU-T SG15
> Q6 data plane capabilities this increased value of "m" modelled.
>
> I believe that we could easily increase the size of the m field, but as I
> understand the status of the Q6 work, we would still need to constrain its use
> as defined in G.694.1. Maybe that is the best compromise: it gives us scope for
> future expansion, but it makes (for now) the value strictly limited according to
> the current definition of the data plane we are controlling.
>
> Thoughts?
> Adrian
>
>> -----Original Message-----
>> From: CCAMP [mailto:[e-mail]] On Behalf Of Gabriele Maria
>> Galimberti (ggalimbe)
>> Sent: 31 January 2014 10:35
>> To: Daniel King; 'CCAMP'
>> Subject: Re: [CCAMP] Generalized Labels for the Flexi-Grid in LSC Label
> Switching
>> Routers
>>
>> Hi Daniel
>>
>> I have a change request on the label:
>>
>> 0                   1                   2                   3
>>      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0  1 2 3 4 5 6 7 8 9 0 1
>>     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>>     |Grid | C.S.  |    Identifier      |               n                |
>>     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>>     |       m     |                     Reserved                    |
>>     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>>
>>
>> I'd like to extend the m value range to 16 bits to have the possibility to
>> Allocate the whole C-band spectrum if needed.
>> With 8 bits we can allocate only 60% of it.
>> Another reason is that when new technologies will be available the
>> Slot Width Granularity may increase (to 6.25GHz or better).
>>
>> So the proposed change is:
>>
>> 0                   1                   2                   3
>> 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0  1 2 3 4 5 6 7 8 9 0 1
>> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>> |Grid | C.S. |    Identifier    |                n              |
>> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>> |                m              |            Reserved           |
>> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>>
>>
>>   m field = 16 bits.
>>
>>
>> Best 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/>
>>
>> [e-mail]
>> Phone :[phone]
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>> Fax :[phone]
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> On 1/29/14 6:06 PM, "Daniel King" <[e-mail]> wrote:
>>
>>> Hi CCAMP'rs,
>>>
>>> The authors are planning a revision of this I-D before London, but the
>>> only
>>> changes will be the addition of an Implementation Status section as per
>>> RFC6982.
>>>
>>> It seems to us that this I-D is stable and that there are no further
>>> technical issues. The label format documented in the I-D has been picked
>>> up
>>> by the RSVP-TE extensions draft and the ongoing OSPF work.
>>>
>>> We would like to take this opportunity to solicit feedback from the
>>> working
>>> group:
>>>
>>> - Are there any changes you would like to see in the draft?
>>> - Are you happy with the label format described?
>>> - What do you think the next steps should be for this draft?
>>>
>>> Thanks,
>>> Dan (for the authors)
>>>
>>>
>>> _______________________________________________
>>> CCAMP mailing list
>>> [e-mail]
>>> https://www.ietf.org/mailman/listinfo/ccamp
>>
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-- 


Loa Andersson                        email: [e-mail]
Senior MPLS Expert                          [e-mail]
Huawei Technologies (consultant)     phone: [phone]