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RE: [802.3ae] Wan Interface Sublayer

> 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?