10-7
Cisco ONS 15454 Installation and Operations Guide
November 2001
Chapter10 Alarm Monitoring and M anagement
Viewing ONS 15454 Alarms
10.2.4 Viewing History
The History tab displays historical alarm data. It also displays eve nts, which are non-alarmed activities
such as timing changes and threshold crossings. For example, protection switching events or
performance monitoring threshold crossings appear here. The H istory ta b pres ent s tw o al arm h isto ry
views:
•The Session subtab (Figure 10-5) presents alarms and events that have occurred during the current
CTC session.
•The Node subtab shows the alarms and events that occurred at the node since the CTC software
installation. The ONS 15454 can store up to 640 critical alarms, 640 major alarms, 640 minor
alarms, and 256 events. When the limit is reached, the ONS 15454 discards the oldest alarms and
events.
Tip Double click an alarm in the alarm table or an event in the histor y table to display the corresponding
view. For example, double-clicking a card alarm takes you to card view. In network view,
double-clicking a node alarm takes you to node view.
Figure10-5 Viewing all alarms reported for the current session