By linking a second balancer to the primary balancer, you can configure the secondary to kick in if the primary goes down. You can use this feature to replace a worn out or outdated balancer with zero downtime. Similarly, you can seamlessly use balancers behind balancers to suit any need. This setup also lets you add servers at any time without service interruption. If a server needs to be taken out of service for configuration c hanges or hardware upgrades, balancers can handle this without interrupting service.
All balancers have a means of disabling a server or service.
Most often, a server can be removed from the site by disabling it at the balancers. This shows the flexibility of adding servers with minimal hardware changes, as well as the ease of software configurability. During the installation process, you must address questions regarding network layout and server configuration. A great deal of planning is needed to ensure an efficient and proper implementation of this technology. Take the time to draw diagrams and find any possible bottlenecks.