Web OS 10.0 Application Guide
384 Chapter 15: Content Intelligent Switching 212777-A, February 2002
Configuring Cookie-Based Preferential Load Balancing
To configure cookie-based preferential load balancing, perform the following procedure.
1. Before you can configure header-based load balancing, ensure that the switch has already
been configured for basic SLB with the following tasks:
nAssign an IP address to each of the real servers in the server pool.
nDefine an IP interface on the switch.
nDefine each real server.
nAssign servers to real server groups.
nDefine virtual servers and services.
For information on how to configure your network for SLB, see Chapter 6, “Server Load Bal-
ancing.
2. Turn on URL parsing for the virtual server.
where
sid = cookie name
1 = offset (the starting position of the value to be u sed for hashing)
6 = length (the number of bytes in the cookie value)
d = looks for the cookie in the cookie header instead of the URI (disables searching for cookie
in the URI)
3. Define the cookie values.
Since a session cookie does not exist in the first request of an HTTP session, a default server or
“any” server is needed to assign cookies to a “None” cookie HTTP request.
>> # /cfg/slb/virt 1
>> Virtual Server 1 # service 80
>> Virtual Server 1 http Service # httpslb cookie
Enter Cookie Name: sid
Enter the starting point of the Cookie value [1-64]: 1
Enter the number of bytes to extract [1-64]: 6
Look for Cookie in URI [e|d]: d
>> # /cfg/slb/layer7/slb/add "Gold"
>> # add "Silver"
>> # add "Bronze"