Broken Sessions due to packet loss 1

[PHead2]

I've got a question regarding broken terminal services sessions that get broken due to packet loss or connectivity issues.

We are just using Windows 2003 Terminal Servers, I know this is a Citrix forum but from reading the posts here this seems to have the most concentrated knowledge of terminal services.

I have a problem where users connections are dropped every now then. Sometimes the screen goes to grayscale and the icon of the network connection with a red X appears in the corner of the screen and reponse gets very slow, sometimes the connection is just dropped. Users can reconnect right away.

I was wondering if this simply the nature of running terminal server farms which are accessed over the internet or is it an indication of more serious connectivity problems. It will be fine for awhile, but these problems periodically come up. We have a T1 for our internet connection.

Thanks.

 

[xs4citrix]

Well, i think if you're using the internet as a transport medium, citrix would be your best shot, despite the wishes of the MS marketing department. It's very hard to beat ICA when it comes to this.

There are some regkey's that are often used in the citrix community, that you could also try on RDP:

[KEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]
"KeepAliveTime"=dword:0000ea60
"KeepAliveInterval"=dword:000003e8

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]
"TcpMaxDataRetransmissions"="10"

Play around with the MTU setting

HKLM\system\currentcontrolset\services\tcpip\parameters\interfaces\"ID for Adapter"

Add a dword value MTU with a value of 1492 decimal

(Default MTU for ethernet = 1500, for DSL = 1492, for ISDN = 576 )

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[PHead2]

Thanks, what is it that makes ICA a better choice?

From what I've read it seems to be implied that it takes up less bandwidth and has a more reliable connection but this hasn't been said in so many words.


If I add the above regkeys what effect will they have?

My guess is that it the first two increase the connection timeout period and the last one increases the maximum packet size on the adapet in question. TcpMaxDataRetransmissions is pretty straightforward. What are the default values if these keys are not added.

Thanks again.

 

[PHead2]

One more question, do these keys need to be added to the server, the client, or both?

 

[xs4citrix]

>>If I add the above regkeys what effect will they have?

Boost performance over slow wan links.

>>What are the default values if these keys are not added

I have no idea; just check the registry of the server for that key.

>>One more question, do these keys need to be added to the server, the client, or both?

Server. The keepalive key can also run on the client, but is often not needed.

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