On Mon, 18 Mar 1996 Jasper@cloud9.net wrote:
MCI issued a press release this afternoon. Two items of interest:
1) MCI is upgrading its backbone from 45 megabits to 155 megabits per second. They expect this to be done by mid April. I think this has been coming along for a while now. A question:
Does anyone know when Sprint and Alternet will have their backbones up to 155 megabits per second. A guy at MCI told me today they wouldn't have it done until 1st quarter of 1997.
Another question: What kinds of routers can route at near wire speeds a bunch of ports at 155Mb ATM? --- David Miller ---------------------------------------------------------------------------- It's *amazing* what one can accomplish when one doesn't know what one can't do!
On Tue, 19 Mar 1996, David Miller wrote:
On Mon, 18 Mar 1996 Jasper@cloud9.net wrote: What kinds of routers can route at near wire speeds a bunch of ports at 155Mb ATM?
None right now. Gigarouter can handle it theoretically, but... I'm being picky, but it's a moot question since doing wirespeed OC3c using ATM is impossible in of itself. Hell, mapping of SONET framings to ATM cells take off about 6 mbps right there. Anyway, until then you have a router that can do this, there always are ATM switches + cluster of routers. -dorian
On Tue, 19 Mar 1996, David Miller wrote:
On Mon, 18 Mar 1996 Jasper@cloud9.net wrote: What kinds of routers can route at near wire speeds a bunch of ports at 155Mb ATM?
None right now. Gigarouter can handle it theoretically, but...
We were able to get pretty close to "ATM wire speed" with our Gigarouter at OSC. The trick of course is to find equipment that can actually fill the pipe.
I'm being picky, but it's a moot question since doing wirespeed OC3c using ATM is impossible in of itself.
Yup. There's work in progress to put IP directly on SONET, which should save people with OC-3c backbones from paying the ATM penalty. ...arun --------------------------------------------------------------------------- Arun Welch 5000 Arlington Centre Blvd Lead Software Engineer Columbus, OH 43220 CompuServe awelch@csi.compuserve.com
Arun Welch wrote: Yup. There's work in progress to put IP directly on SONET, which should save people with OC-3c backbones from paying the ATM penalty. Cook: would you please give a pointer to whom they are and what one reads or looks at to get up to speed? (ie IP over sonet) ********************************************************************* Gordon Cook, Editor & Publisher Subscriptions: Individ-ascii $85 The COOK Report on Internet Individ. hard copy $150 431 Greenway Ave, Ewing, NJ 08618 USA Small Corp & Gov't $200 (609) 882-2572 Corporate $350 Internet: cook@cookreport.com Corporate Site Lic. $650 http://pobox.com/cook/ for new COOK Report Glossary of Internet terms *********************************************************************
I am told that Cisco has an OC-3 interface to its 75XX series of routers. If so why would you need a cluster of routers around each ATM switch? ********************************************************************* Gordon Cook, Editor & Publisher Subscriptions: Individ-ascii $85 The COOK Report on Internet Individ. hard copy $150 431 Greenway Ave, Ewing, NJ 08618 USA Small Corp & Gov't $200 (609) 882-2572 Corporate $350 Internet: cook@cookreport.com Corporate Site Lic. $650 http://pobox.com/cook/ for new COOK Report Glossary of Internet terms ********************************************************************* On Tue, 19 Mar 1996, Dorian Kim wrote:
On Tue, 19 Mar 1996, David Miller wrote:
On Mon, 18 Mar 1996 Jasper@cloud9.net wrote: What kinds of routers can route at near wire speeds a bunch of ports at 155Mb ATM?
None right now. Gigarouter can handle it theoretically, but...
I'm being picky, but it's a moot question since doing wirespeed OC3c using ATM is impossible in of itself. Hell, mapping of SONET framings to ATM cells take off about 6 mbps right there.
Anyway, until then you have a router that can do this, there always are ATM switches + cluster of routers.
-dorian
participants (4)
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Arun Welch -
David Miller -
Dorian Kim -
Gordon Cook