Cisco CCNP / BSCI: Using The OSPF Command...
Your BSCI and CCNP exam success depends on knowing the details, and one such detail is knowing the proper way to summarize routes in OSPF. Route summarization is not just a test of your binary conversion abilities, but knowing where and when to summarize routes. It will not surprise any CCNA or CCNP certification candidate that...
OSPF Route Redistribution Review
OSPF route redistribution is an important topic on the BSCI exam, and its a topic full of details and defaults that you need to know for the exam room and the job. To help you pass the BSCI exam, heres a quick review of some of the OSPF route redistribution basics.
Changing Root Bridge Election Results
Your BCMSN and CCNP studies will include mastering the details of Spanning Tree Protocol (STP). While you learned some of these details in your CCNA studies, quite a bit of it may be new to you. Before going on to the intermediate and advanced STP features, lets...
The Evil Packet Sniffer
A "Packet Sniffer" is a utility that sniffs without modifying the network's packets in any way. By comparison, a firewall sees all of a computer's packet traffic as well, but it has the ability to block and drop any packets that its programming dictates. Packet sniffers merely watch...
Losing Data Over VPN
Sometimes change is good, sometimes it's bad, and sometimes it's a mixed bag. Such was the case recently when a customer switched a remote office from a 56K line to using a Kerio VPN over Internet connections. The 56K line was slow and expensive, so the switch had immediate benefits. Unfortunately a problem also...
ColdFusion And Server Monitoring
Unlocking the CF Server Black Box. How to answer questions about your server. How is it doing? What templates/queries are slow? New tool: CF Server Monitor. Monitors requests via all paths (template, CFC, web service, gateway, Flash Remoting) Has minimal...
ISIS Router Types
To pass the BSCI exam and earn your CCNP, youŽve got to know ISIS inside and out. There are many similarities between ISIS and OSPF, but one major difference is that ISIS has three different types of routers - Level 1 (L1), Level 2 (L2), and L1/L2. L1 routers are...
Configuring An Access Server
As your CCNA / CCNP home lab expands, an access server such as the Cisco 2509 or 2511 is one of the best investments you can make. In this article, weŽll look at the basic configuration for an access server and discuss how to connect to the other routers and switches...
Tips For Terminal Servers
By John Kellett
Here's a list of tips to help ensure your Terminal Servers are functioning as efficiently as possible. These are rules I always abide by. Have a look, they may help you too...
1.) Sort your profiles out
Profiles are the biggest cause of slow logons and many other issues in Terminal Server environments. Keeping these to a minimum size, deleting when unnecessary and generally managing them is a great place to start. There are various tools about such as UPHClean, delprof, as well as the Flexprofile kit. Other things to assist are the mandatory and roaming profile options available in the Windows server operating systems.
2.) Use Windows Group Policies
Windows group policies are comprehensive and versatile. They can be tailored to make your Terminal server environment secure and user friendly. Using loopback policies is a great idea in Terminal Server environments as they allow you to specify policies that only apply when a user logs onto a Terminal server (for example disable the shutdown command). If they logon anywhere else such as to their laptop a different set of policies can be applied.
3.) Don't store data on your Terminal Servers
Of course this isn't always possible if you have a very small amount of servers but generally speaking it's best not to have any data on your Terminal Servers where possible. Policies, drive mappings and other tools can all be utilised to ensure that files are where they should be - on file servers.
4.) Image your Terminal Servers
Once you have a newly built Terminal server configured the way you want it with no extra data on it it's a great time to image your server. A third party tool such as Symantec's ghost used in conjunction with other tools such as Newsid means youcan have a server rebuilt and back in the farm within minutes. Likewise, if you buy a new server in of identical specification to your existing servers this too can be serving your users within minutes of it arriving on site. For detailed instructions on how to image a Citrix server click here.
5.) Test those applications
Bunging an application on without testing is a sure fire way to get yourself in trouble. Even if you get away with it a few times you're sure to come a cropper if you always take that approach. Thoroughly testing an application before deployment is a necessity in a live environment. Ideally a test lab using live users or tools like Loadrunner if you have the budget but failing that digging an old server or PC out and testing on that could save you a red face (or your job) later on.
6.) Reboots and Sessions
Not everyone agrees with this one but I feel regular rebooting is a good thing. The fact that scheduled reboots are an available option in Citrix Presentation server suggests someone else does too. If applications do have a memory leak it will get progressively worse and hold onto resources until rebooted. Also set your sessions as you want them. It's frustrating for users if they are disconnected if they don't move their mouse for two minutes but making sure there sessions are completely logged off when not in use frees up system resources.
7.) Pagefile size and location
The pagefile on your Terminal servers should be off the system drive where possible. Also, set it to twice the amount of physical RAM in the server.
Printing in a Terminal server environment has always been a huge headache. A few simple tips can help keep your environment stable.
Keep the amount of drivers to a minimum, if particular print drivers are causing issues use the Universal driver where possible and try and ensure all your Terminal servers have the same drivers on to keep the users experience the same wherever they logon. This site is an excellent resource for Terminal Server Print problems: http://www.printingsupport.com/
9.) Monitor your servers
There are plenty of tools available to you. Citrix 4.5 Presentation Server now has health monitoring which alerts you of services not starting etc but regularly using tools like Citrix's Resource Manager, Microsoft's performance monitor and Server Performance advisor can help you stay alert and ahead of the game if used correctly.
10.) Load balance your servers
In Citrix there are many different options other than the default load evaluators which people largely ignore. It's usually not until an event such as several servers going down at one that you find they are configured incorrectly. For example if two of your servers go down and those users then try logging on to your one remaining server chances are it's going to get overloaded and crash as well.
About the Author:
John Kellett is a UK based Citrix and Windows consultant.