Intel 7190 manual Part 3 Adding Load Balancers to an Existing Site

C H A P T E R 4 Intel® NetStructure™ 7190 Multi-Site Traffic Director User Guide

Part 3 – Adding Load Balancers to an Existing Site

Key Concepts:

•Adding a Load Balancer (Agent)

•Disabling a Site

•Mixture of Brokered and Non-brokered Sites

•Configuring for Future Expansion

•Deleting an ISV Group

•Adding and Deleting Services

After the sites have been up and running for a while it is still easy to change the configuration to add new servers, services and hosts. But if the site data traffic increases significantly it is often advantageous to add load balancers to manage the traffic to the Web servers. Done correctly, the addition of a load balancer at a site can be handled with minimal service interruption.

There are two methods to handle this transition. The first method requires that all existing network addresses be kept in place. The 7190s would continue to refer clients directly to the servers until the configuration changes are committed. The second method assumes that addresses of the servers might change. The act of changing network addresses of servers usually entails taking a site offline while transitioning.

The 7190 has some built-in features that make this transition almost as simple as the first method. In this section, the 7190 is used to take sites offline (no new referrals) to add a load balancer at each site.

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