Pushpendra,
At http://ext2.mfsdatanet.com/MAE/west.map.html you will find a connection map dated Sept 18.
This was the map I looked at. What's changed is that it no longer differentiates connections to the NASA Ames and San Jose switches, which I'm pretty sure it used to. I think the map's first column used to read something like "MFS-Giga" and "Ames-Giga" which made it immediately obvious which switch someone was connected to. It isn't so obvious any longer...
If you can share more information about the end to end path you were testing, I could shed more light on it.
Steve Feldman's message explained the source of the congestion, and my question was really motivated by my (apparently erroneous) belief that the pair of OC-3 circuits was congesting. I do gather from Steve's message that data is clocked out of the Gigaswitch ATM interface at 100 Mbits/sec. Thanks for the response Pushpendra. best regards, mb