user manual

13-14
Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Chapter 13 Alarm Monitoring and Management
13.7 Suppressing Alarms
Figure 13-4 Card View Port Alarm Profile for an OPT-BST Card
13.7 Suppressing Alarms
ONS 15454 SDH nodes have an alarm suppression option that clears raised alarm messages for the node,
chassis, one or more slots (cards), or one or more ports. After they are cleared, these alarms change
appearance from their normal severity color to white and they can be cleared from the display by clicking
Synchronize. Alarm suppression itself raises an alarm called AS-CMD that is shown in applicable
Alarms windows. Node-level suppression is shown in the node view Alarms window, and card or
port-level suppression is shown in all views. The AS-CMD alarm itself is not cleared by the suppress
command. Each instance of this alarm indicates its object separately in the Object column.
A suppression command applied at a higher level does not supersede a command applied at a lower level.
For example, applying a node-level alarm suppression command makes all raised alarms for the node
appear to be cleared, but it does not cancel card-level or port-level suppression. Each of these conditions
can exist independently and must be cleared independently.
Suppression causes the entity alarm to behave like a Not Reported event. This means that the alarms,
having been suppressed from view in the Alarms window, are now only shown in the Conditions window.
The suppressed alarms are displayed with their usual visual characteristics (service-affecting status and
color-coding) in the window. The alarms still appear in the History window.
Note Use alarm suppression with caution. If multiple CTC sessions are open, suppressing the alarms in one
session suppresses the alarms in all other open sessions.