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Re: [CCAMP] One comment on draft-zhang-ccamp-flexible-grid-ospf-ext

"Gabriele Maria Galimberti (ggalimbe)" <ggalimbe@cisco.com> Wed, 30 April 2014 07:42 UTC

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From: "Gabriele Maria Galimberti (ggalimbe)" <ggalimbe@cisco.com>
To: "wang.lei131@zte.com.cn" <wang.lei131@zte.com.cn>, "ccamp@ietf.org" <ccamp@ietf.org>, "zhang.xian@huawei.com" <zhang.xian@huawei.com>
Thread-Topic: [CCAMP] One comment on draft-zhang-ccamp-flexible-grid-ospf-ext
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Date: Wed, 30 Apr 2014 07:42:06 +0000
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Subject: Re: [CCAMP] One comment on draft-zhang-ccamp-flexible-grid-ospf-ext
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I agree with LeWang,

I'd also add that the MaxWidth field must be more than 8 bits (e.g. 16 bits).
This is to align this parameter to the recent ITU liaison reply on m value range.

Best Regards,

Gabriele
[http://www.cisco.com/swa/i/logo.gif]


Gabriele Galimberti
Technical Leader
Cisco Photonics Srl

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www.cisco.com/global/IT/<http://www.cisco.com/global/IT/>

ggalimbe@cisco.com<mailto:ggalimbe@cisco.com>
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From: "wang.lei131@zte.com.cn<mailto:wang.lei131@zte.com.cn>" <wang.lei131@zte.com.cn<mailto:wang.lei131@zte.com.cn>>
Date: Wednesday, April 30, 2014 9:12 AM
To: "ccamp@ietf.org<mailto:ccamp@ietf.org>" <ccamp@ietf.org<mailto:ccamp@ietf.org>>, Xian Zhang <zhang.xian@huawei.com<mailto:zhang.xian@huawei.com>>
Subject: [CCAMP] One comment on draft-zhang-ccamp-flexible-grid-ospf-ext


Hi, Xian and CCAMPers

I have one comment on draft-zhang-ccamp-flexible-grid-ospf-ext:

In section 4.3, page 7, the encoding of "Port Label Restriction sub-TLV" is listed as follows.

     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
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    | MatrixID      | RstType = TBA |            Reserved           |
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    |     C.F.G     |    S.W.G      |   Min Width   |   Max Width   |
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

In my opinion, it is not necessary to put the field "C.F.G" into this TLV, because that: C.F.G could be deduced from S.W.G (C.F.G = S.W.G / 2).  Would anyone give one example where C.F.G != S.W.G / 2 ?

--------------------------------------------
LeiWang

ZTE
Bearer Network Product Pre_research Department,
Wireline R&D Insititute
Cell phone:+86 13811440067
Email: wang.lei131@zte.com.cn<mailto:wang.lei131@zte.com.cn>
      hechen0001@gmail.com<mailto:hechen0001@gmail.com>
      leiw@tsinghua.edu.cn<mailto:leiw@tsinghua.edu.cn>
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