The NR-REG maintenance object generates alarms when:

It is assumed that a Survivable Remote Server is provided for the network region and that the gateways and IP phones will register with the Survivable Remote Server based on the primary search list for gateways and the alternate gatekeeper list for IP phones.

NR-REG alarms will only be generated if hyperactive link bounce detection is enabled on the system-parameters ip-options screen. Registration will be denied only if the disable nr-registration commands are entered from the SAT.

The hyperactive NR-REG alarms and the associated disable/enable nr-registration network-region commands should only be used for situations where IP network problems cause gateways and IP phones to repeatedly register and unregister to a server at a rate that is too fast for the normal link bounce strategy to cause the gateways and phones to fail over to a Survivable Remote Server.

The system detects hyperactivity by monitoring the number of link down failures reported to the MED-GTWY maintenance object. When enough link down failures are detected within the administered time frame, an alarm is raised against the offending gateway. Using this data, a percentage of hyperactive gateways is calculated and checked against the administered system-wide limit. If the limit is exceeded, a minor alarm is generated for the network region. The system does not try to recover from hyperactivity. It only generates an alarm.

If a certain period of time passes without any additional link down events, the hyperactivity alarm is cleared. The alarm is resolved if less than 50% of the gateways required to raise an alarm are out of hyperactive mode.