To configure Windows server 2008 R2 to load balance Citrix Web Interface 5.x is very simple procedure. The following procedure describes the basic steps involved.
Configure Citrix Web Interface
Open the Citrix Web Interface Management console
Click “XenApp Web Sites” and click “Create Site”
Modify the IIS site settings if required
Click “Set as the default page for the IIS site”
Specify the point of the authentication as “At Web Interface”
Click “Next” to finish creation of the site
Once the site is successfully created click “Next” to configure the site
Specify the Citrix Farm name, Citrix Servers and the XML port
Specify the required authentication methods
Configure “Domain Restriction”
Specify the “Logon Screen Apperance”
Specify whether the site will provide access to Online published applications only, Offline application only or both online and offline applications (Dual mode)
Installation of the Citrix Web Interface is now complete
On the second Web Interface server repeat the process to create a Web Interface Site.
Configure Windows 2008 R2 Network Load Balancing
Open “Server Manager” and select “Features”
Click “Add Feature” and select “Network Load Balancing”
Click “Next” and “Install” to complete installation
Open “Network Load Balancing Manager” from Administrative Tools
Click “Cluster” and select “New”
Enter the hostname or IP address of the local machine
Set the “Priority” as 1 for the first web server.
Set the Cluster IP Address
Enter a FQDN for the “Full Internet Name”
Change “Cluster operation mode” to “Multicast”
Specify “Port range” as 80.
If using SSL Certificate create a second port rule for 443
Once finished the NLB cluster will be created and after a short period the status should be “Converged”
Install NLB on the second server
Configure NLB on the second server from the NLB Manager console on the first server.
Click the newly created cluster and select “Add host to cluster”
Enter the hostname of the second server
Double check the “Priority” is “2″
The “Port Rules” will already be defined.
Clicking finish will add the second server to the cluster, after a short period the status of both servers will show as “converged”
Create a DNS entry
Open DNS Manager console and create a “Host (A)” record mapping the fqdn of the cluster to the cluster IP address.
Test the NLB is working by accessing the load balanced Web Interface via the cluster FQDN. Test further by stopping the NLB service on each individual server and access the website again.