My VPN only connects at 9600bps with 2000 server

[Tom]

When I establish a vpn to the 2000 server it only connects
at 9600bps maximum! This is with a DSL connection at both
ends. When I use the same workstation and establish a vpn
connection to my 2003 server it connects at
100,000,000bps, so I am guessing it is the 2000 server. I
must not be setting it up right because on two different
2000 server's I get the same thing. I doubt that the max
connection available for 2000 is 9600bps. Any one have an
idea I would appreciate it.
Thanks,
Tom

 

[Carl DaVault [MSFT]]

The number reported is just the speed that the underlying media is
reporting. The real speed of a VPN connection isn't detected dynamically. If
you connect over a 100Mb/s NIC, some intermediate segment could be slower,
but your speed may show up as 100Mb/s.

If you want to conduct a speed test to compare servers or OS versions, you
can try ping, tracert, pathping, or come up with some other measurement such
as a web-based bandwidth test.

 

[tom]

I think it is more than that. I tested the connecting and
to download a 15MB file on the 9600bps takes 26 minutes
while with the same workstation on the 10,000,000
connection takes only 5 minutes. This verifies that I
have something not right on the 2000 server, just not sure
what it is. Anyone else out there have an answer would be
appreciated.
Thanks,
Tom

 

[Carl DaVault [MSFT]]

It does indeed seem that there is something different about the 2000
server... there is some improved performance in server2k3, but I don't think
it would necessarily account for 5 times the throughput.

Comparing a "netsh ras dump" between the two machines can show you RAS
configuration differences (such as compression being enabled/disabled), but
you might just be looking at some difference in the DSL connection.

I do not believe that the tunneling protocols will "back off" on slower
links - each VPN connection will usually hit one of several limits due to
applications or bandwidth restrictions:

* latency limit (will affect [slow down] the encapsulated IP protocols)
* bandwidth limit (usually apps don't run on full bandwidth anyway)
* CPU limit for encryption/compression (you won't see at DSL speeds)

FTP is better for bandwidth tests than copying via explorer.exe.

15MB/9600Bps = 26 minutes, however I think you said the link speed is
showing 9600 bps not Bps. If that's right, you're still 8x faster than the
link speed is showing in terms of bps.

I guess the only other things I can ask are...

Are there identical hardware setups and identical ISP's (sometimes you can
get a different route with the same ISP).

Does the 9600 indication show up on the client or on the server's DSL "NIC"
when you connect?

Does upgrading the slower server to 2k3 help?

If you figure this out, it would be interesting to know the cause/outcome.