Configuring the Web servers for Load Balancer

Before configuring Load Balancer, the Web servers need a loopback alias that points to the cluster address of cluster.itso.ibm.com (10.20.10.100). To configure this, follow these steps for each Web server on Windows 2000:

1. Log on as a user with administrator rights and click Start -> Settings -> Control Panel.

2. To add the MS Loopback Adapter Driver: a. Double-click Add/Remove Hardware. This launches the Add/Remove Hardware Wizard. b. Click Next, select Add/Troubleshoot a Device, then click Next. The Choose a Hardware Device window is displayed. c. Scroll down to check if the MS Loopback Adapter is already in the list of installed hardware. If so, you can click Cancel to exit. d. If the MS Loopback Adapter is not in the list, select Add a New Device and click Next. e. Do not search for new hardware (the default). Instead, choose the option to select new hardware from a list and click Next. f. Select Network Adapters and click Next. g. On the Select Network Adapter window, select Microsoft from the Manufacturers list and then Microsoft Loopback Adapter from the Network Adapter list. Click Next twice to install the Loopback Adapter. h. Click Finish to complete the installation.

3. From the Control Panel, double-click Network and Dial-up Connections.

4. Select the connection that is using the Microsoft Loopback Adapter and right-click it. Select Properties from the context menu.

5. Select Internet Protocol (TCP/IP), then click Properties.

6. Check Use the following IP address. For the IP address enter the cluster address of 10.20.10.100. For the Subnet mask enter 255.0.0.0.

Notes:
	Please note that the Subnet mask for the cluster address is 255.0.0.0 and not 255.255.0.0.

Don't enter a gateway address. Use the localhost as the default DNS server.

AIX: To add the loopback alias in AIX, use the following command: ifconfig lo0 alias cluster.itso.ibm.com netmask 255.255.0.0

For other operating systems, refer to the Load Balancer Administration Guide, GC09-4602.

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