Complete the following steps to set up GSLB for primary and backup site on NetScaler:

This scenario assumes, Round Robin on both NetScaler ADNS.

Method 1

Configure two GSLB virtual servers, one with the desired primary Service (usually Local Service) and a second GSLB virtual server with the backup Service (usually Remote Service).

NetScaler Site 1

1. Create a GSLB virtual server, bind the domain name, and the Local Service.

2. Create a GSLB virtual server, do not bind the domain name, however, bind the Remote Service.

3. Add the second GSLB virtual server on the Primary GSLB virtual server as a backup virtual server.

NetScaler Site 2

1. Create a GSLB virtual server, bind the domain name, and the Remote Service.

2. Create a GSLB virtual server, do not bind the domain name, however bind the Local Service.

3. Add the second GSLB virtual server on the Primary GSLB virtual server as a backup virtual server.

For more information refer to CTX128999 - How to Configure GSLB in Active Passive Mode on NetScaler Appliance
 

Method 2

NetScaler Site 1

1. Configure a GSLB virtual server, bind the Local Service. Add the domain with a backup IP being the IP address of the Remote Service. 

2. Backup virtual server is not necessary.

NetScaler Site 2

1. Configure a GSLB virtual server, bind the Remote Service. Add the domain with a backup IP being the IP address of the Local Service. 

2. Backup virtual server is not necessary.

Note: The DNS will resolve to the backup IP (Site 2 Local Service), if both services are down.

CTX128999 - How to Configure GSLB in Active Passive Mode on NetScaler Appliance