Chapter 17: Web Hosting Configuration Guide

Load Balancing

Note: Load balancing requires updated SSR hardware. Please refer to Appendix A for details.

You can use the load balancing feature on the SSR to distribute session load across a group of servers. If you configure the SSR to provide load balancing, client requests that go through the SSR can be redirected to any one of several predefined hosts. With load balancing, clients access servers through a virtual IP. The SSR transparently redirects the requests with no change required on the clients or servers; all configuration and redirection is done on the SSR.

Configuring Load Balancing

The following are the steps in configuring load balancing on the SSR:

1.Create a logical group of load balancing servers and define a virtual IP for the group.

2.Define the servers in the group.

3.Specify optional operating parameters for the group of load balancing servers or for individual servers in the group.

Creating the Server Group

To use load balancing, you create a logical group of load balancing servers and define a virtual IP for the server that the clients will use to access the server pool.

To create the server group and define the virtual IP for the server, enter the following command in Configure mode:

Create group of load balancing

load-balance create group-name <group name>

servers.

virtual-ip <ipaddr> [virtual-port <port

 

number> ] protocol tcpudp

 

[persistence-level tcpsslvpnsticky]

 

 

Create a range of load

load-balance create vip-range-name <range

balancing server groups.

name> vip-range <range> [virtual-port

 

<port number> ] protocol tcpudp

 

[persistence-level tcpsslvpnsticky]

 

 

Adding Servers to the Load Balancing Group

Once a logical server group is created, you specify the servers that can handle client requests. When the SSR receives a client request directed to the virtual server address, it

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SmartSwitch Router User Reference Manual

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Cabletron Systems 9032578-05 manual Configuring Load Balancing, Creating the Server Group