Re: [CCAMP] Poll on ODUFlex-related encoding

John E Drake <jdrake@juniper.net> Tue, 05 February 2013 22:38 UTC

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From: John E Drake <jdrake@juniper.net>
To: "Zafar Ali (zali)" <zali@cisco.com>, Fatai Zhang <zhangfatai@huawei.com>, Lou Berger <lberger@labn.net>
Thread-Topic: [CCAMP] Poll on ODUFlex-related encoding
Thread-Index: AQHOAJZIp0Jrhhyhc0msDaQa8E07uZhlyPMAgAPtjoCAATW8AIAAuNSAgAAEd7A=
Date: Tue, 5 Feb 2013 19:19:25 +0000
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Subject: Re: [CCAMP] Poll on ODUFlex-related encoding
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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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