Configuring Multiple ProxySG appliances in a failover group ensures that your users can always reach the Internet, while maintaining your security policies. When failover group membership changes don't work as expected, there are things you can look at to resolve the issue.
The most common issue in establishing a failover group is that the failover group configuration isn’t enabled. Verify that the failover groups you've created are enabled as follows:
1. In the ProxySG appliance management console, browse to the Configuration tab > Network > Advanced > Failover.
2. Click the failover group you've created and click Edit. The edit failover group dialog appears.
3. Examine the check box at the top of the dialog. If it's unchecked, check it and click OK, then Apply.
Compare all of the ProxySG appliances in the failover group and verify that your configuration matches appropriately. Issues arise most commonly when the following items on each member of the failover group are not set correctly:
The following Knowledge Articles may help further.