Sunday, January 5, 2014

Exchange Server 2010 -Configuring Client Access Array - Part-2

Client Access Server Array Pre-Requisites

Two or more Exchange Server 2010 Client Access Servers can be configured as a CAS array using NLB as long they are not also installed as Mailbox servers that are members of a Database Availability Group (DAG), reason I already described in above.

To demonstrate the setup of a CAS array the following servers have been provisioned.

Server #1

Operating System: Windows Server 2008 64-bit R2
Name: CH.Tech.Com
Primary Interface:
NLB Interface: 

Server #2
Operating System: Windows Server 2008 64-bit R2
Name: CH2.Tech.Com
Primary Interface:
NLB Interface:
The IP address allocated to the NLB cluster will be

WNLB Configuration
Install the Windows Network Load balancing windows feature by issuing the following commands in a PowerShell console on both CAS servers:
·         Import-Module ServerManager
·         Add-WindowsFeature nlb

Once NLB has been installed, launch the Network Load Balancing Manager to continue the configuration process.

To create your new cluster, you can right-click Network Load Balancing Clusters or simply click Cluster, New.

Connect to the first server for the NLB cluster.

Choose the interface that is to be used for the cluster, and then click Next. 

Accept the default Host parameters and click Next.

Click Add and enter an IPv4 address for the NLB cluster, then click OK.

Click Next to continue. Enter a name for the cluster.  In this example I’m using CASArray.Tech.Com.  Click Next to continue.

Although the port rules can be made more specific, in this example the default rule is acceptable.  Click Finish to complete the creation of the NLB cluster.

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