Tweaking citrix for better Wan performance

[fs483]

Hello,

I wanted to know how to get better performance out of citrix through a slow wan. I did a tracert between my site and my remote site which is connected via satelitte because they are on another continent. The latency between the ISP base station and the remote site is about 600ms which according to them is normal. I know for sure my servers and my isp at the Head Office is OK, we have a 3mb down and 768kb up. It's been tested and reflect roughtly those values. However users at the remote site complain about slowness. The ISP that we deal with says one other of his customers had a similar problem and was solved with some "tweaking of Citrix" but he wasn't able to give me the details. I'll try to get in contact with him but meanwhile, I would like to try doing some tweaking of my own. Do you have any ideas ? For other users that are within the same continent (at other locations), the speed is great, it's only once it goes through the satelitte link.

thanks
anthony

 

[Philly44]

It is impossible to eliminate the latency, it takes time to send the signal the 44K kilometers into orbit and then the 44K kilometres back. On the client side you can turn on things like local text echo, choose the option of WAN when the connection is setup, and make sure that sound isn't running(its a real bandwidth hog). Essentially though if they are complaining that they have to wait a second or two after hitting the mouse button to see the action there is now way around that, unless you can send a signal faster then the speed of light.

 

[fs483]

Yeah that much I know, but I was wondering if there's any other way of maybe changing the registry, compressing the data even more. I already reduce the colors to 256 and a couple of other things. If the problem was solved at another location, then it can probably be applied to me too. I'm still searching on the net... Just for the heck of it, I'll have my onsite tech try to bypass the cisco pix firewall to see if he gets better performance... Maybe the firewall is doing some major filtering...

On thing for sure and this has nothing to do with Citrix, their uplink is slow. I routinely log into the remote site servers through remote desktop and the refreshing is very slow, you can see the line per line being displayed on the screen. Also at first I though the double click function wasn't working on the mouse then later realized because of the latency, I had to increase the delay of the double click ! he he.

 

[sikek]

Did you ever resolve this issue?

 

[fs483]

The original problem was partly due to a faulty router on the VSAT side. Latency is pretty high between the ground station and the satelite but that is expected and unavoidable. As for the registry tweak, nada. Never got the info. My customer increased also the speed of the line (added $$$). You can also try to uncheck the Session Reliability checkbox like someone suggested in another thread using Directway service.

Good luck !
akwong

 

[MikeBatters]

It is also worth check to be sure that there is no other traffic running over the link and using up vital bandwidth.

PacketShaper units can disgnose this for you and provide detailed information on exactly what is using your bandwidth and then get rid of everything non essential.

It can make a big difference and you can also find traffic you never knew was there in the first place.

Mike

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Remember - There is always another way..........I just haven't found out what it is yet!

 

[me3304]

Sikek,

Check out thread # 48-852623 “Slow or no connection via DSL & Satellite from June 2004, ProFate posted a link there to a Citrix White Paper, regarding settings for wireless Wide Area Networks, it can also be applied to satellite connections. Helped us somewhat.

 

[sikek]

Ok thanks for the update.

 

[TChachra]

We were having latency issues with citrix metaframe 4. The fix was quite easy.
Open port 2598 on the firewall.
The speed improvement was massive.