Cisco Router: DS1 total errored seconds Health Monitor

Summary

Number of DS1 Total Errored Seconds is over threshold.

The number of Errored Seconds in the previous 24-hour interval is above the maximum threshold configured in Xian Network Manager 2012.

Causes

For ESF and E1-CRC links, an Errored Second is a second with one or more Path Code Violations OR one or more Out of Frame defects OR one or more Controlled Slip events OR a detected AIS defect.

Path Code Violations, Out of Frame defects, Controlled Slip events, or a detected AIS defect.

Resolutions

Verify the framing format configured on the port matches the framing format of the line in the show controller e1 output. Once an Out of Frame defect is declared, the framer starts searching for a correct framing pattern and ends when the signal is in frame. Verify the clock source is derived from the network. In the show controller e1 EXEC command output, look for 'Clock Source is Line Primary'. Set the clock source from controller configuration mode. The Alarm Indication Signal failure is declared when an AIS defect is detected at the input and the AIS defect still exists after the Loss Of Frame failure which is caused by the unframed nature of the 'all-ones' signal is declared. The AIS failure is cleared when the Loss Of Frame failure is cleared.

Additional

This rule monitors the number of Errored Seconds encountered by a DS1 interface in the previous 24-hour interval.