NetScaler can load balance or redirect the traffic based on the geographic location of the client requesting for the resource.
Example: If a client requesting for a resource is located in India, it would not be able to access the webpage from the servers in NewZealand. However if any client which is local to New Zealand would be able to open the same webpage as NS will be able to detect the GEO IP location and redirect the traffic.
Some times we see the above functionality would not work as expected.