Re: [CCAMP] Poll for adoption - draft-martinelli-ccamp-wson-iv-encode-09

"Giovanni Martinelli (giomarti)" <> Mon, 12 March 2018 08:57 UTC

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From: "Giovanni Martinelli (giomarti)" <>
To: Dieter Beller <>
CC: Leeyoung <>, "CCAMP (" <>
Thread-Topic: [CCAMP] Poll for adoption - draft-martinelli-ccamp-wson-iv-encode-09
Date: Mon, 12 Mar 2018 08:57:36 +0000
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Subject: Re: [CCAMP] Poll for adoption - draft-martinelli-ccamp-wson-iv-encode-09
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looks like you are opening again a discussion we had a while back.
If you look at draft-ietf-ccamp-wson-iv-info there’s clear statements about this and it was formalizing the output of Join ITU/Ccamp meeting hold in Orlando at IETF86. If you like we can sum up again the conclusion but probably you may first want to provide specific comments on draft-ietf-ccamp-wson-iv-info, it’s a WG draft and its open for improvements.

This specific draft draft-martinelli-ccamp-wson-iv-encode-09 just provide encoding for defitions within draft-ietf-ccamp-wson-iv-info where list of parameters was provide by ITU liason referred in the document.


On 12 Mar 2018, at 09:37, Dieter Beller <<>> wrote:

Hi Young, all,

based on what you wrote below, I conclude that the defined impairment parameters are insufficient for IV and vendor-specific (proprietary) extensions are
needed anyway (e.g. opaque OSPF-TE LSA extensions). That's why this draft as well as the related drafts do not provide a solution to the problem of optical IV.
These drafts are wrongly suggesting that such a solution exists.


On 09.03.2018 21:09, Leeyoung wrote:
Hi all,

The scope of this document is to enhance OSPF to carry LSA that includes impairment data. How to use these data is up to head end node or external PCE to compute the path that is impairment-aware.
RFC 6566 explains this context well. See Section 5 of RFC 6566 that discusses the computation models. Of course, the computation algorithm as to how to use impairment info is the secret source for each vendor, which is not what we talk about in this draft. We only say these impairment data is needed to enhance the RWA optical path calculation.

Hope this explains.


From: CCAMP [] On Behalf Of Giovanni Martinelli (giomarti)
Sent: Friday, March 09, 2018 3:44 AM
To: Dieter Beller <><>
Cc: CCAMP (<>) <><>
Subject: Re: [CCAMP] Poll for adoption - draft-martinelli-ccamp-wson-iv-encode-09

agree on the fact that this comment apply to other drafts, rather than this one, in particular: RFC6566 and draft-ietf-ccamp-wson-iv-info


On 9 Mar 2018, at 10:04, Dieter Beller <<>> wrote:

Hi all,

no/do not support

Reasoning: the definition of optical impairment parameters and the encoding of those is useless without the definition of a computational model for
optical impairment validation (IV) in the context of end-to-end path computation in a WDM network.
Computational models are typically vendor-specific and the draft does therefore not provide a solution to the problem of optical impairment validation
(computation of paths where optical impairment constraints need to considered.) The same applies to the related drafts addressing IV.


On 06.03.2018 18:41, Daniele Ceccarelli wrote:
Working group,

This starts a two weeks poll on making  draft-martinelli-ccamp-wson-iv-encode-09 a CCAMP working group document.
Please send email to the list indicating "yes/support" or "no/do not support" and a motivation for  your reply, mandatory for the "not support" and nice to have for the "support".
Please note that the IPR declarations was carried out against version -08 and this is version -09 but there is no change in the content of the document, just a date refresh. No IPR was disclosed against this document.
The polling will end on Tuesday march 20th.

Daniele & Fatai


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