You have a production implementation of Management High Availability, at version VPN-1 NG with Application Intelligence R55. You must upgrade your two SmartCenter Servers to VPN-1 NGX. What is the correct procedure?
A.
1. Synchronize the two SmartCenter Servers.
2. Upgrade the secondary SmartCenter Server.
3. Upgrade the primary SmartCenter Server.
4. Configure both SmartCenter Server host objects version to VPN-1 NGX.
5. Synchronize the Servers again.
B.
1. Synchronize the two SmartCenter Servers.
2. Perform an advanced upgrade on the primary SmartCenter Server.
3. Upgrade the secondary SmartCenter Server.
4. Configure both SmartCenter Server host objects to version VPN-1 NGX.
5. Synchronize the Servers again.
C.
1. Perform an advanced upgrade on the primary SmartCenter Server.
2. Configure the primary SmartCenter Server host object to version VPN-1 NGX.
3. Synchronize the primary with the secondary SmartCenter Server.
4. Upgrade the secondary SmartCenter Server.
5. Configure the secondary SmartCenter Server host object to version VPN-1 NGX.
6. Synchronize the Servers again.
D.
1. Synchronize the two SmartCenter Servers.
2. Perform an advanced upgrade on the primary SmartCenter Server.
3. Configure the primary SmartCenter Server host object to version VPN-1 NGX.
4. Synchronize the two Servers again.
5. Upgrade the secondary SmartCenter Server.
6. Configure the secondary SmartCenter Server host object to version VPN-1 NGX.
7. Synchronize the Servers again.