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OmniSwitch AOS Release 7 Network Configuration Guide June 2013 page 23-1
23 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. The OmniSwitch operates 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),
scalability (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).
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:
•
Procedures to configure SLB on a switch on page 23-11 .
•
Procedures to configure logical SLB clusters on page 23-12 .
•
Procedures to configure physical servers in SLB clusters on page 23-14 .
•
Procedures to configure SLB probes on page 23-18 .
•
Procedures for troubleshooting and maintenance on page 23-17 and page 23-22 .
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.