RE: [PWE3] PWE Service interworking

["Lin, Zhi-Wei" <Zhiwlin@NYCT.com>]

Hi all,

Sorry to interrupt your very informative discussions, but I have a question.
In the case of the MPLS (which is our topic?) my understanding is that OAMs
are always end-to-end? "Segment" OAMs similar to ATM can be created for MPLS
simply by stacking a new MPLS header?

Thanks for any clarification
Zhi


> -----Original Message-----
> From: Shahram Davari [mailto:Shahram_Davari@pmc-sierra.com]
> Sent: Thursday, June 05, 2003 3:56 PM
> To: 'Mark Seery'; Jack Pugaczewski
> Cc: pwe3@ietf.org
> Subject: RE: [PWE3] PWE Service interworking 
> 
> 
> Mark,
> 
> 1) Each layer should have segment OAM mechanism that applies 
> only to that layer.
> 2) End-to-end OAM at each layer corresponds to the 
> terminating points of that layer.
> 
> -Shahram
> 
> >-----Original Message-----
> >From: Mark Seery [mailto:mark@mseery.com]
> >Sent: Thursday, June 05, 2003 3:48 PM
> >To: Jack Pugaczewski
> >Cc: pwe3@ietf.org
> >Subject: RE: [PWE3] PWE Service interworking 
> >
> >
> >--- Jack Pugaczewski <jtpugac@qwest.com> wrote:
> >> Segment and End-to-End OAM are utilized on an every
> >> day basis and a
> >> strategic part of the fault isolation process.  More
> >> specifically, the
> >> ability to generate an End-to-End at an intermediate
> >> node is essential.
> >> This allows the client (or client application) to
> >> initiate the request to a
> >> single element management system.
> >> 
> >> PJMWBGJJREGTATALDBJHJHSLDHGSDWJAMY
> >
> >Thanks Jack, 
> >
> >1) Is it important that every layer be able to do a
> >segment OAM on every segment, or just the segments
> >that logically belong to that layer (i.e. as
> >delineated by access points of that layer)? For
> >example, in the following network:
> >
> > 1      2        3    4     5      6        7         
> >CE----ATM_SW-----PE----P----PE----ATM_SW----CE
> >
> >From the perspective of the ATM layer (assume VCC, no
> >VPC), Is a segment between 2 and 6 or are 2-3, 3-4,
> >4-5, and 5-6 also considered segments (from the
> >perspective of your requirements as an operator).
> >
> >2) When an end-to-end OAM is initiated from an
> >intermediate node, what is considered end-to-end? For
> >example, in the following network:
> >
> >
> > 1      2        3    4     5      6        7         
> >CE----FR_SW-----PE----P----PE----ATM_SW----CE
> >
> >If an end-to-end OAM is initiated at "6" towards the
> >direction of "1", where would you expect the OAM to
> >terminate/take action?
> >
> >Thanks,
> >Mark
> >
> >
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> >
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