RE: [PWE3] PWE Service interworking

["Thomas D. Nadeau" <tnadeau@cisco.com>]

	I think you need to clarify what "end to end"
means. In the way of PWE/MPLS I believe it means
PE-PE imposition/disposition points. 

	--Tom

> 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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