Artesyn Centellis 2000 Shelf - DC Installation and Use (June 2014) - Manual (Page 147)

Redundancy
Centellis 2000 Shelf - DC Installation and Use (6806800G45F) 147
To detect where the active shelf manager is located, the system manager can use the following
techniques:
 Inside the AdvancedTCA shelf
The system manager pings via both Ethernet interfaces to the active virtual IP address of
the shelf manager to identify in which slot the active shelf manager is located.
 Outside the AdvancedTCA shelf with interlinks between the ATCA-MF105 hubs
The system manager pings via its own active IP address to the active virtual IP address of
the shelf manager.
10.2.3 Redundancy Operations
This section describes what happens during shelf manager switchover, takeover, failover, and
when a shelf manager is inserted or extracted.
10.2.3.1 Shelf Manger Switchover
During a switchover, the active and the standby shelf manager change their roles. The system
manager initiates and controls this process on the active shelf manager. A switchover is, for
example, necessary when the active shelf manager needs to be extracted. Since only the
standby shelf manager can be extracted, a switchover needs to take place.
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
10.2.3.2 Shelf Manager Takeover
Takeover is a process to switch the active and the standby roles of the ATCA-MF105. The system
manager initiates and controls this process on the standby shelf manager.