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This posting is provided "AS IS" with no warranties, and confers no rights. The opinions expressed within are my own and should not be attributed to any other Individual, Company or the one I work for. I just happen to be a classic techie who is passionate about getting things to work as they should do (and are sometimes advertised and marketed as being able to?) and when I can I drop notes here to help others falling in to the same traps that I have fallen in to. If this has helped then please pass it on - if you feel that I have commented in error or disagree then please feel free to discuss with me either publically or privately? Cheers, Dave
Thin Clients, VDI and Linux integration from the front lines.... Raw and sometimes unedited notes based on my experiences with VMware, Thin Clients, Linux etc.

I've had a couple of articles pinned in Bloglines to post at some stage and I never seemed to quite get around to it - until today, time for Spring Cleaning?

This comes from MS Terminal Services.org
Bandwidth Management: Part 3 – Guaranteeing and Protecting ICA/RDP on LAN/WAN
Quite a tidy article from Andy Jones, that gets in to how to protect the bandwidth for ICA. However a lot of Customers seem to get put off Packetshaper by the price, a slightly different solution that can sometimes give you 50 - 70% of what Packetshaper does (but without the lovely GUI?) is to use something like Cisco's Priority Queuing?

Now I'm not an expert on Cisco by any means, but as far as I'm aware, this would only be possible if you either have control over all the Network Devices OR you can ensure that they are all setup the same (i.e. you're stuffed if someone else manages the Cisco box on your behalf?). Anyway, the concept is to "Tag" all traffic by Port address (or something close?) and then assign a value to each Tag - ICA gets a 1, Oracle gets a 2, Printing gets 100, File Transfers get something like 80? Mail (SMTP) could be defined at 25? - anyway you get the idea, it's simple, almost crude in a way, but it'll get the job done.
If you want to know more contact your local Cisco Bod? And try these links on them?
http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/qos.htm#1020714
http://www.cisco.com/warp/public/779/smbiz/community/qos_basics.html
(your mileage may vary on this depending on how good, or confident? your Cisco Admin is?)

In fact MS Terminal Services.org also has another article that points this out rather well:

The use of QoS:
QoS stands for Quality Of Service, and is a way of delegating a minimum and maximum bandwidth availability to a specific protocol. These days most WAN environments hold many traffic types, and Microsoft’s RDP or Citrix’s ICA is just one of many. As explained earlier, both protocols do not take much bandwidth, but that little they need has to be there for the sessions to be fully functional and stable.

If your router is equipped with QoS functionality, it is highly advisable to make full use of it. The safest thing to set is a minimum that can be taken by RDP or ICA traffic. That way the sessions throughput will never get clogged on the server side, and can take full advantage if more bandwidth is available.

Cisco:
In March 2004, Cisco enhanced their NBAR (Network-Based Application Recognition) technology towards the ICA protocol, by making a (free) ICA PDLM (Packet Data Language Module) available called “citrix_ica”. This module works as from IOS 12.3(7)T released in March 2004. This new module can work together fully with the existing ICA priority packet tagging technology already present in the router.

Another important option available in Cisco routers 2600, 3600 and 7200 series is the “Weighted Fair Queuing”. Once activated it allows fairer treatment of smaller packages (like RDP and ICA), versus a larger package. This one is especially important in small bandwidth connections like 64 or 128kb lines.

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Courtesy of Michel at ThinComputing.net comes this very nice article from Jason:
Deploying a Pre-Configured Citrix Client using Active Directory
Hat's off to Jason because he's doing a fantastic job at documenting these steps with images like this:

Now if you want to have the ability to create great screenshots like this, there is one tool I'd recommend very highly and that is ACA Capture. You don't need to worry about the Pro version unless you want to record Video like sessions.

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So this has been sittinin my "in tray" for a little while? I came across Stephan's site a little while ago and was quite impressed with the list of Tools and Downloads aplicable to Terminal Servers and Citrix Servers.

Posted on Tuesday, April 4, 2006 2:39 PM Citrix , IT Management , Real Cool Stuff , Microsoft Tips , VMware and other Virtualization tools | Back to top


Comments on this post: A round up of Citrix and SBC based Articles - in no particular order..... ;-)

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