Men,
From my recollection of NetEdge connections from WorldCom Santa Clara to MFS at Market St. in San Jose, the NetEdges have to be used in pairs, like:
CPE -- 10baseT/FDDI ---|netedge|--- DS3 ---|netedge|--- 10baseT/FDDI -- switch In otherwords, the NetEdges act as bridges, which have to be used in a pair in order to turn the ethernet or FDDI connection into ATM over the DS3 and back. The NetEdges are programmable, and I'm sure that bandwidth is one of the things that's configurable. We used to run these things fairly full and fairly hard for extensive periods of time. I think we were able to get about 30Mpbs full duplex out of them. I doubt that dropping packets at ~6Mpbs is the NetEdges' fault (unless you had really old ones). The fundamental problem at the upper bound is that you're taking IP, encapsulating it in ethernet or FDDI, then segmenting and further encapsulating that (IP inside ethernet/FDDI) inside ATM. The double encapsulation extracts even more of a tax than the !53 bunch usually complain about. In the end, in addition to needing more than the 30Mpbs bandwidth to the MAE which the NetEdges gave us, the NetEdge solution was more trouble than it was worth because of our inability to monitor the NetEdges for trouble (not that they couldn't be monitored, but they were MFS owned gear). We had to rely on Datanet to tell us what was going on, and many times problem resolution gave as a cause FWT (fixed while testing), which customers were always reluctant to accept as cause. If you're interested in a second opinion, you might try contacting NetEdge directly. good luck, -peter At 07:49 PM 7/9/97 -0400, Alex Rubenstein wrote:
To my knowledge:
|-------| 10Plus Cust---|netedge|---DS3---| ATM | | | 10Plus Cust---|netedge|---DS3---|Switch |--ATM--|Cisco 4700/7xx0|--(World) |Cascade| 10Plus Cust---|netedge|---DS3---| | |-------|
I have no idea what the xBR is on the DS3 to the NetEdge.
At 03:17 PM 7/9/97 -0400, Deepak Jain wrote:
My impression [which could be wrong] was that the 10Plus service was delivered over clear channel DS3 between netedges and the actual 10Mbit/s portion was dealt with at the media exchange. I didn't know/think they formatted the DS3 as an ATM 10mbit/s circuit.
Then again, I have never ordered 10Plus service.
-Deepak.
On Wed, 9 Jul 1997, Joe Shaw wrote:
Well, the ATM connection to the Net Edge box is only setup to do 10Mbps, so at 6Mbps on ATM, you've filled your cells. I think the whole ideaology behind the thing is flawed, and if they're going to sell something they call 10 Plus, they need to at least provide 10 of something other than 10Mbps in theory. I'm not happy with UUNet (it took 5 months to get the Net Edge box replaced), and I doubt they will have anything but the smallest possible presence in our network in the future.
Joe Shaw - jshaw@insync.net NetAdmin - Insync Internet Services "Learn more, and you will never starve." - Paraphrase of Lee
On Wed, 9 Jul 1997, Deepak Jain wrote:
You could always plug an FDDI card into the back of the Netedge.
-Deepak.
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"Don't go with a spineless ISP; we have more backbone."
Alex Rubenstein -- alex@nac.net -- KC2BUO -- www.nac.net net @ccess corporation, 201-983-0725 -- 201-983-0725