Re: [CCAMP] Poll on ODUFlex-related encoding

Fatai Zhang <zhangfatai@huawei.com> Thu, 07 February 2013 01:23 UTC

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From: Fatai Zhang <zhangfatai@huawei.com>
To: John E Drake <jdrake@juniper.net>, "Zafar Ali (zali)" <zali@cisco.com>, Lou Berger <lberger@labn.net>
Thread-Topic: [CCAMP] Poll on ODUFlex-related encoding
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Date: Thu, 7 Feb 2013 01:22:57 +0000
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Subject: Re: [CCAMP] Poll on ODUFlex-related encoding
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Hi all,

Let me confirm the proposed changes in the signaling draft before updates are done.

(1) Keep "Tolerance" field as proposed by Zafar (Supported by John and me). Any objections from the WG?
(2) Remove "N" field for ODUflex(GFP) as we all agreed.

Anything missed?




Best Regards

Fatai

-----Original Message-----
From: John E Drake [mailto:jdrake@juniper.net] 
Sent: Wednesday, February 06, 2013 3:19 AM
To: Zafar Ali (zali); Fatai Zhang; Lou Berger
Cc: CCAMP; draft-ietf-ccamp-gmpls-ospf-g709v3@tools.ietf.org; draft-ietf-ccamp-gmpls-signaling-g709v3@tools.ietf.org
Subject: RE: [CCAMP] Poll on ODUFlex-related encoding

Snipped, comment inline

Irrespectively Yours,

John

> >    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
> > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> >  |  Signal Type  |       N       |        Reserved       |
> >  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> >  |              NVC           |      Multiplier (MT)     |
> >  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> >  |                      Bit_Rate                       |
> >  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> 
> I just wonder are we not better off keeping Tolerance field in
> signaling and adding a statement in v7 that this field is hardcoded to
> 100ppm.
> 
> This has advantage of interworking with earlier draft implementations
> and is also flexible for various (future/ unknown) client signal types.
> I.e., we use the same encoding as defined thus far in the document
> (copying from
> v6):
> 
>       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
>      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>      |  Signal Type  |       N       |           Tolerance           |
>      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>      |              NVC              |        Multiplier (MT)        |
>      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>      |                            Bit_Rate                           |
>      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> 
> And state that Tolerance MUST be set to 100 ppm.


JD: This is a very good idea.  'Per [G.874.1/2011] (or whatever is the correct reference) Tolerance MUST be set to 100 ppm.'

 
> 
> 
> Thanks
> 
> Regards...Zafar
> 
> ><snip>
> 
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