Note: Supported from NetScaler 10.5 Build 52.11 onwards.
To set up GSLB in a cluster you must bind the different GSLB entities to a node group. The node group must have a single member node.
The parent-child topology of GSLB is not supported in a cluster.
If you have configured the static proximity GSLB method, make sure that the static proximity database is present on all the cluster nodes. This happens by default if the database file is available at the default location. However, if the database file is maintained in a directory other than /var/netscaler/locdb/, you must manually synch the file to all the cluster nodes.