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Re: [EFM] RE: OAM Transport Proposal


I believe that you're referring to SONET line, section and path in
describing multiple link segments and the managing hierarchy of the WIS,
which employs SONET framing including overhead bytes for management. 

I don't believe that it's within the scope of EFM to consider link
segments. However, the term: "Ethernet Network Element (ENE)" has been
used in several EFM OAM presentations to describe an intermediate
element in an Ethernet link. The resultant link would consist of two
MACs, two link segments and one ENE. I believe that this nomenclature
maintains Ethernet simplicity while provifing functional equivalence
with ITU-T link management hierarchy.

I believe that this is in agreement with Brad's comments below.

Best Regards,


Roy Bynum wrote:
> Brad,
> There are standards with ITU-T that govern the hierarchy of managing
> multiple links.   The hierarchy within the WIS overhead is an example of
> something that will handle OAM over multiple sequential physical links as a
> single end-to-end path link between end systems.  So far, I have not seen
> anything that comes close to that sort of thing within EFM.  Edge
> subscriber networks tend to operate differently.  Do some research on
> Integrated Digital Loop Carrier systems (GR303).  You will see how the
> intermediate systems are handled.
> Thank you,
> Roy Bynum
> At 02:33 PM 4/23/2002 -0700, Booth, Bradley wrote:
> >Forgot to send this to the reflector too.
> >
> >Cheers,
> >Brad
> >
> >______________________
> >Sent from my Blackberry...
> >
> >
> >-----Original Message-----
> >From: Booth, Bradley <bradley.booth@xxxxxxxxx>
> >To: 'dromasca@xxxxxxxxx' <dromasca@xxxxxxxxx>
> >Sent: Tue Apr 23 14:32:52 2002
> >Subject: RE: [EFM] RE: OAM Transport Proposal
> >
> >Dan,
> >
> >Thanks.  I guess my real question is what is that link?  Is it PHY to PHY,
> >is it MAC control to MAC control or is it something else?  I know that 802.3
> >can deal with MAC to MAC links, but I believe that it is also possible for
> >us to have multiple PHY to PHY links beneath that.
> >
> >Thanks,
> >Brad