RDP, VPN's and MTU's

[Bubbalouie]

I ran outta 3 letter acronyms on the subject line!

I run a combination of Cisco PIX and Routers as vpn endpoints at various sites.

Users at my remote locations access WIN2K3 Terminal Services across the VPN. They constantly complain about speed and lag though I have nice healthy T1's at my locations that aren't heavily used.

A friend told me to check the MTU on the term servers.

Pinging from my central location (where all servers are located) to a remote location I came up with a MTU of 1272 using the ping command:

ping 192.168.9.29 -f -l 1272

and from the remote location to a server at the central location I got a MTU value of 1414 using the same procedure.

Does this mean I should change the MTU on my Terminal servers or is there something I have to do special to make a change for RDP?

Thanks In Advance!

 

[technome]

Use Pathping from both ends of the RDP connection, this will show packet losses. Small percent losses are acceptable, though really good is 0%.
Test for the optimal MTU setting from both ends of connections with TCP Optimizer.
TCP Optimizer....
ttp://

http://www.speedguide.net/downloads.php

........................................
Chernobyl disaster..a must see pictorial

http://www.kiddofspeed.com/default.htm

 

[Bubbalouie]

the smallest value I found that works is 1272. Should I set that as the value on the PIX and Router I'm using or should I use 1300 which I keep seeing as I google this issue.

also, if I'm setting the MTU on the network devices, does that mean I don't have to set it on the Terminal Server or the clients?

Thanks In Advance