CHAPTER 3
Alarm History
Alarm history or alarm persistence feature enables the maintenance of the history of the port and the path
alarms of 48-Port T1/E1 CEM Interface Module .
History of the port-level and path-level alarms are saved into a file and is retained for monitoring network
events.
• Alarm History Restrictions, on page 27
• Configuring Alarm History, on page 28
• Verification of Alarm History Configuration, on page 28
• Associated Commands, on page 29
• Additional References for Alarm History, on page 29
Alarm History Restrictions
The following restrictions apply for the alarm history feature:
• Only port and path level alarm history or alarm persistency is supported.
• Persistence of T1/E1 alarms on a Channelized T3/E3 port is not supported.
• Two new files are created after each reboot.
• The primary and secondary log file are created during feature initialization. The primary log file saves
10000 alarms. When the threshold of 10000 alarms in the primary log file is crossed, the subsequent
10000 alarms are saved in the secondary log file. After crossing the threshold of 10000 alarms in the
secondary log file, the content of primary log file is cleared and is replaced with the subsequent alarms.
• When a primary file switches to a secondary file and vice versa, the following happens:
• An information level syslog message is displayed.
• An informatory message is written in the file where subsequent alarms are stored.
• When RSP switchover happens, the alarm history files are not copied to the new active RSP. Two new
files are created in the new active RSP.
• When you re-configure alarm history or alarm persistence feature, two new files are created.
48-Port T1/E1 CEM Interface Module Configuration Guide, Cisco IOS XE Fuji 16.7.x (Cisco NCS 4200 Series)
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