Configuring Shelf-Controller Redundancy (APX 8000)
Configuring the APX 8000 for shelf-controller redundancy
Controller switchover
If the primary controller fatals, the secondary controller automatically takes over as primary controller. The new primary (old secondary) downs all slot cards and then brings the system back up. All connections are dropped. After the primary shelf controller comes up, the slot cards are reset. The system is now ready to take new calls. Each time a controller is selected as the primary controller, an entry is made in the
A switchover, when control passes from the primary controller to the secondary, is initiated by one of the following occurrences:
•The primary controller has a hardware or software problem that causes the module to reset. The secondary is assigned to act as the primary.
•You enter the switchover command,
APX 8000 slot cards communicate with the primary controller through the packet bus. The primary controller is assigned virtual slot number 43, through which communication with the slot cards occurs. If a switchover occurs, the new primary controller inherits virtual slot number 43.
Log messages
Log messages are issued to notify you of significant events related to shelf controller redundancy. For example, the following cases result in a log message:
•A shelf controller becomes primary.
•A fatal log entry is generated when a shelf controller has a software crash.
•A controller becomes primary when no secondary controller is present.
•The primary controller loses heartbeat communication with the secondary controller.
•The primary controller establishes heartbeat communication with the secondary controller.
Configuring the APX 8000 for shelf-controller redundancy
Setting up the APX 8000 for
•Assigning the system IP address
•Assigning the
•Assigning the soft IP address
•Configuring
You can use the
APX 8000/MAX TNT/DSLTNT Physical Interface Configuration Guide |
