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Load Balancing

252 Enterasys Xpedition User Reference Manual

Load Balancing

Note: Load balancing requires updated XP hardware.

You can use the load balancing feature on the XP to distribute session load across a group

of servers. If you configure the XP to provide load balancing, client requests that go

through the XP can be redirected to any one of several predefined hosts. With load

balancing, clients access servers through a virtual IP. The XP transparently redirects the

requests with no change required on the clients or servers; all configuration and

redirection is done on the XP.

Configuring Load Balancing

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

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

servers.

load-balance create group-name <group name> virtual-ip

<ipaddr> [virtual-port <port number>] protocol

tcp|udp [persistence-level tcp|ssl|vpn|sticky]

Create a range of load

balancing server groups.

load-balance create vip-range-name <range name> vip-

range

<range> [virtual-port <port number>]

protocol tcp|udp [persistence-level tcp|ssl|vpn|sticky]

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Cabletron Systems SSIM-R8-02 Spécifications Page 272