Configuring the Server Farm Configuring Server Load Balancing
page 34-10 OmniSwitch 6800/6850/9000 Network Configuration Guide March 2008
Configuring the Server Farm
To configure a server for a VIP cluster, you must associate the VIP address to the loopback interface of the
physical server. Otherwise, physical servers will reject packets addressed to the VIP address.
To configure a server for a QoS policy condition cluster using the Layer-2 SLB mode, enable the server to
receive packets with a destination MAC address that is different than the MAC address of the server (e.g.,
enable promiscuous mode). This will allow the server to receive L2 classified packets that are not modi-
fied before they are bridged to a server. In addition, make sure the cluster servers are members of the same
VLAN that will receive the client request packets.
To configure a server for a QoS policy condition cluster using the Layer-3 SLB mode, enable the server to
receive packets that contain destination IP addresses that may not match any addresses known to the
server. Note that with a Layer-3 policy condition cluster, client request packets are both routed and
bridged to the appropriate servers. Therefore, servers can reside in different VLANs or in the same VLAN
that receives the client requests.
Note. A server can be configured with more than one VIP. Therefore, a server can belong to more than
one SLB cluster.
This section describes procedures for configuring several commonly-used server operating systems,
including Windows NT (see “Configuring a Windows NT Server” on page 34-10), Windows 2000 (see
“Configuring a Windows 2000 Server” on page 34-13), Unix and Linux (see “Configuring a Loopback
Interface on Unix- and Linux-Based Servers” on page 34-21), and Novell Netware 6 (see “Configuring a
Virtual IP Address on a Novell Netware 6 Server” on page 34-22). Please refer to your server’s user docu-
mentation for operating systems not covered in this chapter.
Note. The following two sections on configuring Windows NT and 2000 servers assume that the
Microsoft loopback adapter driver has been installed on your workstation. If you need to install this driver,
please refer to “Adding the Microsoft Loopback Adapter Driver” on page 34-15.
Configuring a Windows NT Server
Follow the steps below to associate a loopback interface on a Windows NT server.
Note. This procedure assumes that your Windows NT workstation already has the Microsoft loopback
adapter installed. If this driver has not been installed, please perform the steps in “Adding the Loopback
Adapter Driver to a Windows NT Server” on page 34-15 before proceeding.
1 Open the Control Panel window by clicking the Start button and then selecting Settings.
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