Artesyn Centellis 4100 Installation and Use (2015) - Manual (Page 199)

Configuring and Operating the System
Centellis 4100 Installation and Use (6806800D82E) 201
The system manager performs the following tasks:
1. Checks whether it can reach the standby shelf manager
2. Initiates a switchover on the active shelf manager using an HPI control
3. Closes the HPI session
4. If necessary, moves its own active virtual IP address to another interface
5. Reestablishes the HPI session to the active shelf manager with saHpiSessionOpen
6. Waits in saHpiResourcesDiscover until the active shelf manager discovers all
resources
6.7.3.2 Shelf Manager Takeover
Takeover is a process to switch the active and the standby roles of the shelf manager boards.
The system manager initiates and controls this process on the standby shelf manager.
The system manager performs the following steps:
1. Initiates a takeover on the standby shelf manager by running the script: sv_activate
2. Closes the HPI session
3. Moves its own active virtual IP address to the other interface
4. Reestablishes the HPI session to the active shelf manager with saHpiSessionOpen
5. Waits in saHpiResourcesDiscover until the active shelf manager will discover all
resources
6.7.3.3 Shelf Manager Failover
Failover is a process when the standby shelf manager becomes the active one because the
active shelf manager fails.
The reasons for the shelf manager failover can be:
 Communication failure between the two shelf managers
 Unexpected removal of the active shelf manager
 Software failure of the active shelf manager
 Failure of the switch through which the virtual IP address is routed