The problem resolution is dependant on the SPECTRUM release in use:
1) For SPECTRUM 8.1: hotfix H19 or better is required.
2) For SPECTRUM 9.0: the SPECTRUM 9.1 service pack is required
During an outage of a customer site that was monitored through a SPECTRUM Secure Domain Connector (SDC), it was noted that an alarm was issued for a Fanout model although all neighboring devices had been suppressed at that time.
Causes of this problem:
The problem is that if the Fanout is not the last device to go down then it will never be suppressed.
(Legacy KB ID CNC TS31813 )