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How virtual server load balancing works

With virtual server load balancing (SLB), the Web Switching Module is configured to act as a virtual server and is given a virtual server IP address (or range of addresses) for each collection of services it distributes. The Web Switching Module supports up to 256 virtual servers, each distributing up to eight different services (up to a total of 2048 services).

Each virtual server is assigned a list of the IP addresses (or range of addresses) of the real servers in the pool where its services reside. When user stations request connections to a service, they communicate with a virtual server on the WSM. When the WSM receives the request, it binds the session to the IP address of the best available real server and remaps the fields in each frame from virtual addresses to real addresses.

Some examples of services that use virtual servers for load balancing include:

See also:


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