OmniSwitch 6800/6850/9000 Network Configuration Guide March 2008 page 34-1
34 Configuring Server Load
Balancing
Alcatel-Lucent’s Server Load Balancing (SLB) software provides a method to logically manage a group of
physical servers sharing the same content (known as a server farm) as one large virtual server (known as
an SLB cluster). SLB clusters are identified and accessed using either a Virtual IP (VIP) address or a QoS
policy condition. Traffic is always routed to VIP clusters and either bridged or routed to policy condition
clusters. OmniSwitch 6850/9000 switches operate at wire speed to process client requests and then
forward them to the physical servers within the cluster.
Using SLB clusters can provide cost savings (costly hardware upgrades can be delayed or avoided), scal-
ability (as the demands on your server farm grow you can add additional physical servers), reliability (if
one physical server goes down the remaining servers can handle the remaining workload), and flexibility
(you can tailor workload requirements individually to servers within a cluster).
Note. SLB is supported on OmniSwitch 6850 and 9000 switches but not on OmniSwitch 6800 Series
switches.
In This Chapter
This chapter describes the basic components of Server Load Balancing and how to configure them through
the Command Line Interface (CLI). CLI commands are used in the configuration examples; for more
details about the syntax of commands, see the OmniSwitch CLI Reference Guide.
Configuration procedures described in this chapter include:
• Steps to configure physical servers on page 34-10.
• Procedures to configure SLB on a switch on page 34-23.
• Procedures to configure logical SLB clusters on page 34-24.
• Procedures to configure physical servers in SLB clusters on page 34-26.
• Procedures to configure SLB probes on page 34-31.
• Procedures for troubleshooting and maintenance on page 34-29 and page 34-35.
Note. You can also configure and monitor Server Load Balancing with WebView, Alcatel-Lucent’s
embedded web-based device management application. WebView is an interactive and easy-to-use GUI
that can be launched from OmniVista or a web browser. Please refer to WebView’s online documentation
for more information on configuring and monitoring Server Load Balancing with WebView.
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