I agree. The term "Maximum SID Depth" is ambiguous, and that it represents the
maximum label-imposition depth rather than the maximum label-read depth is a
historical artifact rather than an indication of its relative importance.
Better that the names and acronyms should directly reflect these two distinct
concepts.
pdm
-----Original Message-----
From: Isis-wg [mailto:[email protected]] On Behalf Of Xuxiaohu
Sent: Wednesday, December 20, 2017 8:40 PM
To: Les Ginsberg (ginsberg) <[email protected]>; Ketan Talaulikar (ketant)
<[email protected]>; Christian Hopps <[email protected]>; [email protected]
Cc: [email protected]; [email protected]
Subject: [Isis-wg] 答复: WG Last Call for draft-ietf-isis-segment-routing-msd-07
Hi Les,
If I understand it correctly, the MSD concept was originated from
(https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftools.ietf.org%2Fhtml%2Fdraft-ietf-pce-segment-routing-11%23page-7&data=02%7C01%7Cpamattes%40microsoft.com%7C757ccfb23bad4b5e33bf08d5481c2f29%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636494208255322142&sdata=v7qCqA3gbbQSpEzlxNEVco0c9nHl1Cu6OelBNKnrTDA%3D&reserved=0)
as described below:
"The "Maximum SID Depth" (1
octet) field (MSD) specifies the maximum number of SIDs (MPLS label
stack depth in the context of this document) that a PCC is capable of
imposing on a packet."
Before considering expanding the semantics of the MSD concept as defined in the
above PCE-SR draft, how about first considering renaming the capability of
imposing the maximum number of labels so as to eliminate possible confusions,
e.g., Writable Label-stack Depth (WLD) as opposed to the Readable Label-stack
Depth (RLD) as defined in
(https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftools.ietf.org%2Fhtml%2Fdraft-ietf-ospf-mpls-elc&data=02%7C01%7Cpamattes%40microsoft.com%7C757ccfb23bad4b5e33bf08d5481c2f29%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636494208255322142&sdata=ejx66Ba86eQyHLwEu6m13swIFqRsWGY%2BEBqCbjNtSI8%3D&reserved=0)
and
(https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftools.ietf.org%2Fhtml%2Fdraft-ietf-isis-mpls-elc&data=02%7C01%7Cpamattes%40microsoft.com%7C757ccfb23bad4b5e33bf08d5481c2f29%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636494208255322142&sdata=JLWqLM9dZp7A5j6iDguRulWZVuHWMIUZpBDIBC81zfo%3D&reserved=0)
?
Best regards,
Xiaohu
> -----邮件原件-----
> 发件人: Isis-wg [mailto:[email protected]] 代表 Les Ginsberg
> (ginsberg)
> 发送时间: 2017年12月21日 4:02
> 收件人: Ketan Talaulikar (ketant); Christian Hopps; [email protected]
> 抄送: [email protected]; [email protected]
> 主题: Re: [Isis-wg] WG Last Call for
> draft-ietf-isis-segment-routing-msd-07
>
> Ketan -
>
> Thanx for the comments.
> I think we do want to allow MSD support for values other than
> imposition values. We will revise the text so we are not restricted to only
> imposition cases.
>
> Les
>
>
> > -----Original Message-----
> > From: Ketan Talaulikar (ketant)
> > Sent: Wednesday, December 20, 2017 1:51 AM
> > To: Christian Hopps <[email protected]>; [email protected]
> > Cc: [email protected]; [email protected]
> > Subject: RE: [Isis-wg] WG Last Call for
> > draft-ietf-isis-segment-routing-msd-07
> >
> > Hello,
> >
> > I support this document and would like to ask the authors and WG to
> > consider if we can expand the scope of this draft to not just
> > "imposition" of the SID stack but also other similar limits related
> > to other
> actions (e.g.
> > reading, processing, etc.). With Segment Routing, we are coming
> > across various actions that nodes need to do with the SID stack for
> > different purposes and IMHO it would be useful to extend the MSD
> > ability to cover those as they arise.
> >
> > Thanks,
> > Ketan
> >
> > -----Original Message-----
> > From: Isis-wg [mailto:[email protected]] On Behalf Of
> > Christian Hopps
> > Sent: 20 December 2017 14:03
> > To: [email protected]
> > Cc: [email protected]; [email protected]
> > Subject: [Isis-wg] WG Last Call for
> > draft-ietf-isis-segment-routing-msd-07
> >
> >
> > The authors have asked for and we are starting a WG Last Call on
> >
> >
> > https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdat
> > atracker.ietf.org%2Fdoc%2Fdraft-ietf-isis-segment-routing-msd%2F&dat
> > a=02%7C01%7Cpamattes%40microsoft.com%7C757ccfb23bad4b5e33bf08d5481c2
> > f29%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636494208255322142&
> > sdata=jAe9BGh48%2BW7M%2B54r%2FSS3YGDvoTtfpFroVNUx4fH4AE%3D&reserved=
> > 0
> >
> > which will last an extended 4 weeks to allow for year-end PTO patterns.
> >
> > An IPR statement exists:
> >
> >
> > https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdat
> > atracker.ietf.org%2Fipr%2Fsearch%2F%3Fsubmit%3Ddraft%26id%3Ddraft-ie
> > tf-is&data=02%7C01%7Cpamattes%40microsoft.com%7C757ccfb23bad4b5e33bf
> > 08d5481c2f29%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C6364942082
> > 55322142&sdata=1cpNKOYIByZn1tpR6%2FkoNtY3SuPQT01tM%2Bkd56x51lM%3D&re
> > served=0
> > is-
> > segment-routing-msd
> >
> > Authors please reply to the list indicating whether you are aware of
> > any
> > *new* IPR.
> >
> > Thanks,
> > Chris.
> >
> > _______________________________________________
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> > icrosoft.com%7C757ccfb23bad4b5e33bf08d5481c2f29%7C72f988bf86f141af91
> > ab2d7cd011db47%7C1%7C0%7C636494208255322142&sdata=LLhn%2B5j%2BWIqR0R
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