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RE: [802.3ae] Wan Interface Sublayer


We are currently deploying OC192c POS over long haul systems using only 
amplifiers and SREs.  The network management of the POS systems at each end 
of the SONET span is separate from the SONET span.  The POS systems are 
"free-running" relative to SONET synchronization.  Fault protection is 
being handled by the SREs.  I do not see any difference in deploying 10GbE 
WAN PHY in the same way.

Thank you,
Roy Bynum

At 04:56 PM 8/24/01 -0500, Ayers, Mike wrote:

> > From: Roy Bynum [mailto:rabynum@xxxxxxxxxxxxxx]
> > Sent: Friday, August 24, 2001 01:09 PM
> > Being a SONET transmission service provider with OC192 SREs
> > already in the
> > transmission network.  With the WAN PHY at +/-20PPM, your
> > possibility #1 is
> > correct.  The SONET SREs (read SONET class B regenerators)
> > can handle the
> > WAN PHY and provide section level performance monitoring and
> > protection.
> > From: James Colin [mailto:james_colin_i@xxxxxxxxx]
> > Sent: Friday, August 24, 2001 12:14 AM
> > Option (4) is the correct answer. SONET and WIS must
> > stay on their own network. A network device called
> > "ELTE" is doing the bridging between the WIS net and
> > the SONET.
>         Hmmm - I think a little more discussion on this is in order, and by
>minds greater than mine.  My interest is this:  if it is possible to route
>WIS directly over a SONET network, then the management model for WIS becomes
>much more involved, since it must support management by either the SONET
>model or the traditional ethernet model (two very different models).
>However, if an ELTE is required betrween the two, it effectively separates
>the networks such that there is no overlap nor need for two management
>models; ethernet being used on one side of the ELTE and SONET on the other.
>It does not matter, from my perspective, whether an ELTE gets used - what
>matters is whether the ELTE is required.  Is it possible that the SRE is
>acting as an ELTE in Roy's scenario?
>         Thanks,