Thread Links Date Links
Thread Prev Thread Next Thread Index Date Prev Date Next Date Index

RE: [802.3ae] Wan Interface Sublayer


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.

Thank you,
Roy Bynum

At 07:15 PM 8/23/01 -0500, Ayers, Mike wrote:

> > 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,