|High Availability and Load Balancer Configuration / Configuring the NetScaler Load Balancer|
When creating a virtual server, you can specify the connection method to use.
By default, the connection method is LEASTCONNECTION, which is to use the server that currently has the least number of connections. TCP connections are often persistent, so they may remain with the server that was first connected to. Another option is ROUNDROBIN, which connects to each server in turn. Either option should provide acceptable performance.
To change the connection method: