Network Router User Manual

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:
n Assign an IP address to each of the real servers in the server pool.
n Define an IP interface on the switch.
n Define each real server.
n Assign servers to real server groups.
n Define 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 used 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"