Services that use network address resources might require that start or stop steps be done in a certain order relative to the network address configuration. The following optional callback methods, Prenet_start and Postnet_stop, enable a resource type implementation to do special startup and shutdown actions before and after a related network address is configured or unconfigured.
This optional method is called to do special startup actions before network addresses in the same resource group are configured.
This optional method is called to do special shutdown actions after network addresses in the same resource group are configured down.