RE: [PWE3] PWE Service interworking

[neil.2.harrison@bt.com]

Tom,

If you understand G.805/809 (and therein lies the major problem) the meaning
of 'end-end' is obvious, ie it's between the trail termination points in
whatever layer network is considered.  Forget the wrong/misleading OSI
model......there is more to networking than 'one' network layer.    

regards, Neil

> -----Original Message-----
> From: Thomas D. Nadeau [mailto:tnadeau@cisco.com]
> Sent: 07 June 2003 13:32
> To: 'Lin, Zhi-Wei'
> Cc: pwe3@ietf.org
> Subject: RE: [PWE3] PWE Service interworking 
> 
> 
> 
> 
> 	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
> > > >
> > > >
> > > >_______________________________________________
> > > >pwe3 mailing list
> > > >pwe3@ietf.org
> > > >https://www1.ietf.org/mailman/listinfo/pwe3
> > > >
> > > _______________________________________________
> > > pwe3 mailing list
> > > pwe3@ietf.org
> > > https://www1.ietf.org/mailman/listinfo/pwe3
> > > 
> > _______________________________________________
> > pwe3 mailing list
> > pwe3@ietf.org
> > https://www1.ietf.org/mailman/listinfo/pwe3
> > 
> 
> 
> _______________________________________________
> pwe3 mailing list
> pwe3@ietf.org
> https://www1.ietf.org/mailman/listinfo/pwe3
> 
_______________________________________________
pwe3 mailing list
pwe3@ietf.org
https://www1.ietf.org/mailman/listinfo/pwe3