February 5, 1999
This problem occurs only in Release 9.1.
The IGX-ARM (Alarm Relay Module) switches from "Active" to "Standby" after two consecutive switchcc commands. The impact to the customer is that the node and network alarms that activate external warning devices such as bells or lamps cease to operate. This may result in alarms going unnoticed, delaying the resolution response actions to correct the alarm condition. Additionally, after the first switchcc command, the Alarm History is irrecoverably lost.
The most easily discerned symptom is observed by using the dspcds command. The ARM will show as "Standby". The observed screen is shown below:
nodename TRM StrataCom IGX 8420 9.1.02 Dec. 29 1998 14:43 PST FrontCard BackCard FrontCard BackCard Type Rev Type Rev Status Type Rev Type Rev Status 1 NPM EDP Standby 9 Empty 2 NPM EDP Active 10 Empty 3 Empty 11 Empty 4 Empty 12 Empty 5 Empty 13 Empty 6 Empty 14 Empty 7 Empty 15 Empty 8 Empty 16 ARM BA ARI --- Standby
The Alarm Relay Module (ARM) activates relays in response to node and network alarms. The relay contacts are presented to the customer's alarm notification system via the IGX-ARI backcard connectors. Depending on the customer's alarm notification system, the relays' "Normally Open" or "Normally Closed" contacts activate an external visual or audible alarm or both. Separate relays are available for visual and audible, Major and Minor, network and node alarms.
The switchcc command allows the IGX-NPM cards to switch over node control. This command is used to exercise node redundancy, clear certain memory allocation problems as well as perform other diagnostic functions. The switchcc command is only used in an IGX-8400 equipped with redundant NPMs.
Log into the node and use the addalmslot slot_number command to reactivate the ARM.
There is no solution at this time. However, the software defect information lists which maintenance version of 9.1 has the fix.
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