The state of a
virtual server depends on the states of the services bound to it, and the state
of each service depends on the monitors bound to it. If a server is slow or
down, the monitoring probes time out and the service that represents the server
is marked as DOWN. A virtual server is marked as DOWN only when all services
bound to it are marked as DOWN. You can configure services and virtual servers
to either terminate all connections when they go down, or allow the connections
to go through. The latter setting is for situations in which a service is
marked as DOWN because of a slow server.
When you configure
the down state flush option, the NetScaler appliance performs a delayed cleanup
of connections to a GSLB service that is down.