Re: [mpls-tp] [PWE3] [AHMPLS-TP] Re: poll ondraft-he-mpls-tp-csf-03.txt

[Thomas Nadeau <[e-mail]>]

	Hi,

> John,
> 
> Typically, IP will only detect a failure in a time scale of minutes.

	That is not really true. Have you heard of BFD or LSP ping?
The typical configurations of those tools is much faster than on
the order of minutes.  It is also typical to configure regular IGP
timers to run faster than that. In typical networks convergence times
are still sometimes on the order of minutes, but there are a number
of best practices for tuning timers and other configuration options
that optimize this down to sub-minute times now too.

> That is one reason why MPLS-TP OAM and Protection & Switching is needed.

	I would argue that based on the argument above, there is no
need for special protection switching mechanisms for MPLS-TP, and that
instead, we should be looking closely at reusing/optimizing those
that exist already first.  Again, based on the argument above, it 
would seem that the existing mechanisms are sufficient.

	--Tom



> I am not sure which mechanism in MPLS provides the CSF-like capability, could you give more hints?
> 
> Thanks
> Yuanlong
> 
> ----- Original Message ----- From: "John E Drake" <[e-mail]>
> To: "Sprecher, Nurit (NSN - IL/Hod HaSharon)" <[e-mail]>om>; "Yuanlong Jiang" <[e-mail]>om>; "Loa Andersson" <[e-mail]>nu>; <[e-mail]>rg>; <[e-mail]>rg>; <[e-mail]>rg>; "MPLS-TP ad hoc team" <[e-mail]>
> Sent: Wednesday, December 01, 2010 9:29 PM
> Subject: RE: [PWE3] [AHMPLS-TP] Re: [mpls-tp] poll ondraft-he-mpls-tp-csf-03.txt
> 
> 
>> Nurit,
>> 
>> As I understand the original requirement from Malcolm Betts, this capability is required for those cases in which a client is unable to detect the failure of its peer.  In MPLS-TP, we have three clients, PW, IP, and MPLS, and I am quite sure that IP and MPLS clients can take care of themselves wrt detecting peer failure.
>> 
>> Thanks,
>> 
>> John
>> 
>> Sent from my iPhone
>> 
>>> -----Original Message-----
>>> From: Sprecher, Nurit (NSN - IL/Hod HaSharon)
>>> [mailto:[e-mail]]
>>> Sent: Wednesday, December 01, 2010 4:47 AM
>>> To: John E Drake; Yuanlong Jiang; Loa Andersson; [e-mail]; mpls-
>>> [e-mail]; [e-mail]; MPLS-TP ad hoc team
>>> Subject: RE: [PWE3] [AHMPLS-TP] Re: [mpls-tp] poll ondraft-he-mpls-tp-
>>> csf-03.txt
>>> 
>>> But what about other client services... e.g. adapted by service-LSP and
>>> not by PWE3?
>>> 
>>> -----Original Message-----
>>> From: [e-mail] [mailto:[e-mail]] On Behalf Of
>>> ext John E Drake
>>> Sent: Wednesday, December 01, 2010 2:35 PM
>>> To: Yuanlong Jiang; Loa Andersson; [e-mail]; [e-mail];
>>> [e-mail]; MPLS-TP ad hoc team
>>> Subject: Re: [PWE3] [AHMPLS-TP] Re: [mpls-tp] poll
>>> ondraft-he-mpls-tp-csf-03.txt
>>> 
>>> I am not convinced.  It seems like it belongs in the Pseudo Wire
>>> application, which already has this capability.
>>> 
>>> Sent from my iPhone
>>> 
>>> 
>>> > -----Original Message-----
>>> > From: Yuanlong Jiang [mailto:[e-mail]]
>>> > Sent: Wednesday, December 01, 2010 1:07 AM
>>> > To: Loa Andersson; [e-mail]; [e-mail]; [e-mail];
>>> > MPLS-TP ad hoc team
>>> > Subject: [AHMPLS-TP] Re: [mpls-tp] poll on draft-he-mpls-tp-csf-
>>> 03.txt
>>> >
>>> > Support.
>>> >
>>> > I believe this mechanism is needed in MPLS-TP.
>>> >
>>> > Thanks
>>> > Yuanlong
>>> >
>>> > ----- Original Message -----
>>> > From: "Loa Andersson" <[e-mail]>
>>> > To: <[e-mail]>rg>; <[e-mail]>rg>; <[e-mail]>rg>; "MPLS-TP ad
>>> > hoc
>>> > team" <[e-mail]>
>>> > Sent: Thursday, November 18, 2010 7:56 PM
>>> > Subject: [mpls-tp] poll on draft-he-mpls-tp-csf-03.txt
>>> >
>>> >
>>> > > all,
>>> > >
>>> > > this is to start a two week poll on making
>>> > >
>>> > > http://www.ietf.org/internet-drafts/draft-he-mpls-tp-csf-03.txt
>>> > >
>>> > > a mpls working group document.
>>> > >
>>> > > Please send comments support/not support to the mpls-tp maililng
>>> > list.
>>> > >
>>> > > The poll ends Thursday Dec 2, 2010.
>>> > >
>>> > > /Loa
>>> > > --
>>> > >
>>> > >
>>> > > Loa Andersson                         email:
>>> > [e-mail]
>>> > > Sr Strategy and Standards Manager            [e-mail]
>>> > > Ericsson Inc                          phone: [phone]
>>> > >                                              [phone]
>>> > > _______________________________________________
>>> > > mpls-tp mailing list
>>> > > [e-mail]
>>> > > https://www.ietf.org/mailman/listinfo/mpls-tp
>>> 
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