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Re: [mpls-tp] 答复: Re: Alarm Reporting (aka AIS)

Greg Mirsky <gregimirsky@gmail.com> Mon, 13 December 2010 19:10 UTC

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Date: Mon, 13 Dec 2010 11:12:03 -0800
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From: Greg Mirsky <gregimirsky@gmail.com>
To: John E Drake <jdrake@juniper.net>
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Subject: Re: [mpls-tp] =?gb2312?b?tPC4tDogUmU6IEFsYXJtIFJlcG9ydGluZyAoYWthIEFJ?= =?gb2312?b?Uyk=?=
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+1

2010/12/13 John E Drake <jdrake@juniper.net>

> Huub,
>
> A bis update to the RFC, indicating that upon further refection the
> requirement was ill-considered, can always be issued.
>
> Thanks,
>
> John
>
> Sent from my iPhone
>
>
> > -----Original Message-----
> > From: mpls-tp-bounces@ietf.org [mailto:mpls-tp-bounces@ietf.org] On
> > Behalf Of neil.2.harrison@bt.com
> > Sent: Monday, December 13, 2010 6:29 AM
> > To: huubatwork@gmail.com; wei.hongbo@zte.com.cn
> > Cc: mpls-tp@ietf.org
> > Subject: Re: [mpls-tp] 答复: Re: Alarm Reporting (aka AIS)
> >
> > Huub wrote 13 December 2010 10:21
> >
> > > Hello Steven,
> > >
> > > You wrote:
> > >
> > > > I think we need to listen to the views of Neil on AIS.
> > > >
> > > > This is just a purely technical discussion, isn't it?
> > >
> > > Yes it is, I am *not* trying to shoot the messenger.
> > >
> > > My concern is that we have a requirement in RFC5860.
> > > A solution (for AIS) is provided in draft-ietf-mpls-tp-fault.
> > >
> > > How will the current discussion affect the progress of this draft?
> >
> > NH=> I guess a key issue here is trying to figure out which, if any,
> > operators still want AIS.  Perhaps those operators did not previously
> > understand that:
> > -     is it a redundant technical function (for reasons I have
> > explained previously), and
> > -     it is a potential source of further problems in itself, as OAM
> > messages have to be constructed/configured (the always-on defect
> > detection needs to be as simple/sparse as possible since it must be
> > significantly more reliable than the network it is monitoring, and thus
> > all unnecessary sources of defects/configuration-errors should be
> > minimised).
> >
> > Perhaps those operators who may have originally supported the
> > requirement for AIS in packet-switched networks did not properly
> > understood these issues before?
> >
> > In any case, it is important that for those operators who have properly
> > understood what AIS is to be able to have this function disabled in
> > their networks.
> >
> > regards, Neil
> >
> > >
> > > Regards, Huub.
> > >
> > _______________________________________________
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