Backup and Redundancy > Detailed Directions > Configuring and Managing Application Server Redundancy > Creating a Redundancy Group > Creating a Redundancy Group with a First Application Server in the Role of Backup
 
Creating a Redundancy Group with a First Application Server in the Role of Backup
 

REQUIREMENTS:  

Make sure you meet the following conditions before beginning this procedure: 
• If you are creating the Redundancy Group using an Application Server whose intended role is Backup, you have already stopped all iControl services on this Application Server (click HERE).
• You have navigated to the iControl—Redundancy configuration page of one of the Application Servers you would like to add to the Redundancy Group (click HERE).
• Cabling for eth0 and eth1 interfaces is properly connected.
• Network settings for eth0 and eth1 have been properly configured on each Application Server you would like to add to the Redundancy Group (e.g. IP broadcast, Netmask, IP address, Host name).
1. On the iControl—Redundancy configuration page, click Click here to create a new Redundancy Group with this server as a BACKUP.

[ Graphic ]  

System Response: The iControl—Redundancy configuration page refreshes with the added Application Server displayed in the Backup area.
2. Near the bottom of the Web page, type the desired Extra IP address.
3. Click Apply.
 

IMPORTANT: Make sure your Extra IP is in the same subnet as your Redundancy Group servers  

• If you configure an Extra IP but not configure in the same subnet as the Application Servers belonging to your Redundancy Group, subsequent tasks like Reverse Takeover can only be done on a laptop connected by crossover cable directly to the Backup.

• If you do not configure an Extra IP and your factory default is not in the same subnet as the other Application Servers, the same behavior as that stated above occurs.

 

IMPORTANT: No redundancy if Main Application Server is not configured  

Even if a Backup Application Server has been added to a Redundancy Group, there is no redundancy if a Main has not yet been added to the group as well. That is, without a Main Application Server, there is no Application Server to backup. To add a Main Application Server to your group, click HERE.