Re: [mpls] 答复: MPLS WG last call on draft-kompella-mpls-special-purpose-labels-04

"Adrian Farrel" <adrian@olddog.co.uk> Fri, 31 May 2013 02:31 UTC

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From: Adrian Farrel <adrian@olddog.co.uk>
To: stbryant@cisco.com
References: <62CCD4C52ACDAD4481149BD5D8A72FD316C76D83@CH1PRD0510MB355.namprd05.prod.outlook.com> <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE081C3B3E@NKGEML512-MBS.china.huawei.com> <51A72ADB.9090009@cisco.com> <51A7499F.1050000@pi.nu> <013501ce5d53$98aebbe0$ca0c33a0$@olddog.co.uk> <51A7B051.7040306@cisco.com>
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Date: Fri, 31 May 2013 03:31:23 +0100
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Cc: 'MPLS WG Mailing List' <mpls@ietf.org>, draft-kompella-mpls-special-purpose-labels@tools.ietf.org, mpls-chairs@tools.ietf.org, 'Loa Andersson' <loa@pi.nu>
Subject: Re: [mpls] 答复: MPLS WG last call on draft-kompella-mpls-special-purpose-labels-04
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Yes (or maybe).

I think it suggests that we should consider this on a case-by-case basis.

Since the labels are allocated as Standards Action (after this I-D becomes an RFC) it seems likely that "appropriate care" can be taken by the working group on a case-by-case basis.

Ciao,
Adrian

> -----Original Message-----
> From: Stewart Bryant [mailto:stbryant@cisco.com]
> Sent: 30 May 2013 21:02
> To: adrian@olddog.co.uk
> Cc: 'Loa Andersson'; 'Xuxiaohu'; 'MPLS WG Mailing List'; draft-kompella-mpls-
> special-purpose-labels@tools.ietf.org; mpls-chairs@tools.ietf.org
> Subject: Re: [mpls] 答复: MPLS WG last call on draft-kompella-mpls-special-
> purpose-labels-04
> 
> Adrian
> 
> That would suggest that we prefer to allocate from the new range and
> keep the
> old range for critical new functions that really are stack size sensitive.
> 
> Stewart
> 
> 
> 
> On 30/05/2013 17:34, Adrian Farrel wrote:
> > I kind of agree with Stewart and Xiaohu, but I note that the regular special
> purpose label space (0-14) *is*already* almost used out.
> > Thus, making the statement would have no effect because we are already
> passed the point.
> > And hence there is no point in adding the text.
> >
> > Adrian (just a humble co-author)
> >
> >
> >
> >
> >> -----Original Message-----
> >> From: Loa Andersson [mailto:loa@pi.nu]
> >> Sent: 30 May 2013 13:44
> >> To: stbryant@cisco.com
> >> Cc: Xuxiaohu; MPLS WG Mailing List; draft-kompella-mpls-special-purpose-
> >> labels@tools.ietf.org; mpls-chairs@tools.ietf.org
> >> Subject: Re: [mpls] 答复: MPLS WG last call on draft-kompella-mpls-special-
> >> purpose-labels-04
> >>
> >> All,
> >>
> >> I agree with Stewart, how the label will be parsed, will have a lot
> >> of impact when we decide how to allocate a new special purspose label.
> >>
> >> /Loa
> >>
> >> On 2013-05-30 12:32, Stewart Bryant wrote:
> >>> On 30/05/2013 04:07, Xuxiaohu wrote:
> >>>> how about explicitly stating that “The Extended special purpose labels
> >>>> SHOULD NOT be allocated by IANA until the regular special purpose
> >>>> label space (0-14) has been almost used out.” or something like that.
> >>>>
> >>> I would disagree with that. There are far more of the new SP labels than
> >>> the old, and the old one's take less stack space and less parsing, so I
> >>> think the right think to do is to consider each application on its own
> >>> merits.
> >>>
> >>> Stewart (AD hat off)
> >>>
> >>>
> >> --
> >>
> >>
> >> Loa Andersson                        email: loa@mail01.huawei.com
> >> Senior MPLS Expert                          loa@pi.nu
> >> Huawei Technologies (consultant)     phone: +46 739 81 21 64
> > .
> >
> 
> 
> --
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