Anyone know this product, along with iptimisation for Windows 2000 Server clients?

We're testing a TSM server on Solaris, but our Wintel throughput (using 5.15 client) is abysmal; ~17MB per minute.

The same network infrastructure provides ~400MB/minute under Arcserve.

Either the client is misconfigured, or the TSM server is. Any ideas? I'm completely unfamiliar with the product :)

Thanks
Richard