Restore Feature in High Availability Setup

This section describes how restore feature works under various scenarios in a High Availability setup.

Scenario 1: Primary NSM system gets corrupted and Secondary NSM system is working fine.

When the Primary NSM system which was Active goes down, the Secondary NSM system which was on Standby now becomes Active.

Below are the steps to restore back the Primary NSM system

1. Restore back the Primary system using any of the applicable scenarios described under Restore NSM to a File System Backup.

2. After successful restoration of Primary NSM system, the Secondary NSM system automatically pushes the settings to Primary. To manually synchronize the settings from Secondary system to Primary system, log into the Secondary system, navigate to System | High Availability > Advanced and click on Synchronize Settings under Diagnostics.

   

   

   To verify that the Primary and Secondary NSM systems are in syn, navigate to System | High Availability > Status and verify that the value for Settings Synchronized to be In Sync

3. After successful synchronization, now the Secondary NSM system is still Active and the Primary NSM system acts as Standby.

   If you need to make the Primary NSM system Active, log into the Secondary system, navigate to System | High Availability > Advanced and click on Force Active/Standby Failover under Diagnostics.

   

4. After a successful failover, the Primary now acts as Active system and Secondary acts as Standby. Next log into Primary NSM system, navigate to System | High Availability > Advanced and click on Synchronize Settings under Diagnostics.

   

Scenario 2: Secondary NSM system gets corrupted and Primary NSM system is working fine.

In this scenario the Primary NSM system is the Active system and the Secondary NSM system is the Standby system.

Below are the steps to restore back Secondary NSM system

1. Restore back the Secondary NSM system using any of the applicable scenarios described under Restore NSM to a File System Backup.

2. Log into Primary NSM system, navigate to System | High Availability > Advanced and click on Synchronize Settings under Diagnostics.

   

Scenario 3: Both the Primary NSM system and the Secondary NSM system gets corrupted.

In this scenario the Primary NSM system is the Active system and the Secondary NSM system is the Standby system and both got corrupt.

Below are the steps to restore back the Primary NSM system and the Secondary NSM system

1. Restore back the Primary NSM system using any of the applicable scenarios described under Restore NSM to a File System Backup.

2. Restore back the Secondary NSM system using any of the applicable scenarios described under Restore NSM to a File System Backup.

3. Log into Primary NSM system, navigate to System | High Availability > Advancedand click on Synchronize Settings under Diagnostics.

   

Scenario 4: Both the Primary NSM system and the Secondary NSM system are working fine and Primary system needs to be restored to an older backup.

In this scenario the Primary NSM system is the Active system and the Secondary NSM system is the Standby system and both are working fine. For any reason, the Primary NSM system needs to be restored to an older backup.

Below are the steps to restore the Primary NSM system to an older backup

1. Shutdown the Secondary NSM system. Refer to Shutdown/Reboot.

2. Restore back the Primary NSM system using any of the applicable scenarios described under Restore NSM to a File System Backup.

3. Power on the Secondary NSM system using KVM, VMWare, Hyper-V or Azure.

4. Log into Primary NSM system, navigate to System | High Availability > Advanced and click on Synchronize Settings under Diagnostics.