ServerIron ADX Server Load Balancing Guide
Release 12.0.00
June 15, 2009

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Server Load Balancing > Real Server Shutdown

Real Server Shutdown
The force shutdown feature (sometimes called the force delete feature) allows you to force termination of existing SLB connections. This feature assumes that you already have shut down a TCP/UDP service on the real server or you have shut down the real server itself.
There are several methods for shutting down a service or server. Each method has consequences, so choose the method that works best in your situation.
Edit the real server configuration on the ServerIron ADX to disable the TCP/UDP ports on the server. For example, to disable port 80 (HTTP), you can use the port http disable command at the real server level of the CLI. If you use this method, you do not need to re-define the real server to add the server back to SLB. However, you do need to re-enable the disabled TCP/UDP ports.
Delete the real server from the ServerIron ADX. This option immediately prevents new connections.
Delete the real server from the ServerIron ADX. This option immediately prevents new connections. To safely delete the real server from the ServerIron, we recommend the following procedure:
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The ServerIron ADX allows existing connections to end normally or, if you have enabled the force shutdown option, the ServerIron ADX ends all connections within two minutes. If you use this method, to re-add the real server to the ServerIron ADX, you must redefine the real server, then rebind the real server to the appropriate VIP.
Shut down the real server itself, rather than change definitions on the ServerIron ADX. When the real server stops responding to health checks, the ServerIron ADX removes the server from the SLB. This option is simple because it does not require any configuration changes on the ServerIron ADX. However, this option immediately disconnects all users, whereas the above options allow the server or service to gracefully shut down (unless you use the force shutdown option).

Server Load Balancing > Real Server Shutdown

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