WebMux – Configuring a Server Loopback Adapter with IPv6 Load Balancing

Load-balancing IPv6 with the WebMux in Out-of-Path mode

Background (optional):
To work in Out-of-Path mode, the server must have the IP address of the farm on the server, so that it does not respond to ARP (definition). It is possible to put an IP address on the loopback adapter for Windows 2008 R2 and above. In fact, the loopback adapter can hold many IP addresses for IPv4 and IPv6. This may be difficult to as soon as it has been installed, but can be done separately afterwards.

First, install the loopback adapter:
1. Navigate to Start > Control Panel > Hardware > Device Manager
2. Right-click the top entry, which should be the name of the machine.
3. Choose to install legacy devices.
4. Manually select Microsoft from the list of vendors as well as the type of device network adapter.
5. Find the Microsoft loopback adapter, and install.

To change the loopback adapter IP address once it is installed, navigate to
Start > Control Panel > View Network Status and Task > Change Adapter Settings.
1. Right-click on the newly-added loopback adapter, and select “IPv4” or “IPv6.”
2. Select “Properties,” then “Advanced.” Here, you may add more IP addresses.

If running Linux 2.6 on CentOS 5 (or above), add the farm address to “lo” with “ip addr add” or “ip -6 addr add.”