Cell Relay Archive

[symon@radonc.unc.edu (James Symon)]

My first reaction is that you might want to revisit
your TCP attempts. Our group was able to get high data 
rates using TCP/IP over a 622Mbps ATM WAN with HIPPI at the 
endpoints. Joseph Evans at the University of Kansas has 
gotten well over 100 Mbps over a standard OC-3c WAN 
spanning 600 km using DEC Alpha workstations and old
FORE Systems ASX100 switches. (evans@eec.ukans.edu)
They tweaked TCP window sizes and paced output for 
better results.

As part of the NECTAR gigabit testbed project, people at
the Pittsburgh Supercomputing Center and CMU worked with
Bellcore on a high speed ATM WAN setup that included 
a prototype HIPPI-ATM gateway they called the HAS. A 
possible contact there is David Smith. The email
address I have for him is djs@faline.bellcore.com.

What is your HIPPI-ATM gateway? I am interested in this 
subject. Our supercomputing center is going to provide
a gateway through their Cray EL computer with a HIPPI
interface on the HIPPI LAN and a FORE card on 
the ATM LAN. Some trouble with hardware and driver 
mismatch up to now but they expect new cards soon. We
should be able to use it to get to the Cray Y-MP's 
HIPPI interface.

I have a FORE card in my SGI. Besides a standard socket
API, they provide a proprietary API that I have not
yet looked at. I don't know whether it uses TCP.

Jim Symon
symon@radonc.unc.edu