Cabletron Systems SMARTSWITCH ROUTER 9032578-05 - Manual (Page 258)

Chapter 17: Web Hosting Configuration Guide
232 SmartSwitch Router User Reference Manual
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:
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
Create group of load balancing
servers. load-balance create group-name
virtual-ip [virtual-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
name> vip-range [virtual-port
] protocol tcp|udp
[persistence-level tcp|ssl|vpn|sticky]