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RE: [802.3ae] Wan Interface Sublayer


I echo James' response. The objective for the WIS was Path transparency
(not Section and Line transparency). Therefore, the WIS SPE data rate is
compatible, the clock tolerance meets SONET Minimum Clock requirements,
and the WIS SPE is formatted properly, with the necessary Path Overhead
functionality. This greatly simplifies the so-called ELTE (see T1X1.5/2001-095),
reducing it to a straightforward Path relay function. There was no intent to
allow a 10GBASE-W interface to be connected optically to an OC-192c

Best regards,

- Tom Alexander
WIS Scribe

-----Original Message-----
From: James Colin [mailto:james_colin_i@xxxxxxxxx]
Sent: Friday, August 24, 2001 12:14 AM
To: 'james_colin_i@xxxxxxxxx'; stds-802-3-hssg@xxxxxxxx; Mike_Ayers@xxxxxxx
Subject: Re:[802.3ae] Wan Interface Sublayer

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.
---  > -----Original Message-----

> From: Ayers, Mike [mailto:Mike_Ayers@xxxxxxx]
> Sent: Friday, August 24, 2001 3:16 AM
> To: stds-802-3-hssg@xxxxxxxx
> Subject: RE: [802.3ae] Wan Interface Sublayer
> > From: Jonathan Thatcher
> > Sent: Thursday, August 23, 2001 04:49 PM
> > The entire jitter specification and test
> methodology for
> > SONET is different
> > than in 802.3ae. This is due, in part, to the
> objectives for the two
> > standards organizations and the history of the
> groups. In the
> > case of SONET,
> > a primary objective is to limit jitter propagation
> (yes, this is a
> > simplification); in 802.3ae, the primary objective
> is plug
> > and play (no
> > engineered links; no jitter propagation).
>       Okay, but what does this translate to in terms of
> interoperability?
> I see four possibilities:
>       1.)  WIS will always route well over SONET, but
> SONET can not be
> routed over XGBASE(name?) networks.
>       2.)  WIS and SONET can run on each others'
> networks, but distances
> must be kept relatively short and number of hops
> relatively low to meet
> jitter/clocking specs.
>       3.)  SONET will always route well over
> XGBASE(name?) networks, but
> WIS can not be routed over SONET networks.
>       4.)  WIS and SONET must stay on their own networks.
>       Which would it be?
>       Thanks all,
> /|/|ike

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