Cell Relay Archive

[James Carlson <carlson@ironbridgenetworks.com>]

Anouch Gharagozlou <anoush@club-internet.fr> writes:
> It seems that many telecom providers are willing to offer IP services
> directly over Sonet or SDH by-passing ATM levels.
> 
> They say Quality Of Services guaranty may not be a problem with the huge
> amount of bandwidth provided.
> 
> This may be a frequently asked question by now. What do you think about
> this technology?

I think it's a wonderful first step.  Of course, the next step is to
subsume SONET/SDH as well.

> Is that mean the death of ATM after so many promises it gave ?
> What are the pros/cons ?
> 
> Can anyone direct me to more litterature on this subject ?

IP over SONET/SDH is done by means of PPP over SONET/SDH.  See RFCs
1619, 1661, 1662, and 1332.  There are also a few Internet Drafts
(I-Ds, sort of a prototype RFC) for enhanced PPP-over-SONET operation.

You can get both RFCs and I-Ds from http://www.ietf.org/.

There is a group (composed mostly of cisco) that is working on
IP-over-fiber without ATM or SONET/SDH.  It's called the Optical
Internetworking Forum, and you can read more at http://www.oiforum.com/.

-- 
James Carlson, Consulting S/W Engineer  <carlson@ironbridgenetworks.com>
IronBridge Networks / 55 Hayden Avenue  71.246W    Vox:  +1 781 372 8132
Lexington MA  02421-7996 / USA          42.423N    Fax:  +1 781 372 8090
"PPP Design and Debugging" --- http://people.ne.mediaone.net/carlson/ppp