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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
Chapter 2 Alarm Troubleshooting
2.7.25 AUTOSW-AIS
Note When you replace a card with the identical type of card, you do not need to make any changes
to the database.
Step 3 If the alarm does not clear, log into the Technical Support Website at http://www.cisco.com/techsupport
for more information or call Cisco TAC (1-800-553-2447).
2.7.25 AUTOSW-AIS
Default Severity: Not Reported (NR), Non-Service-Affecting (NSA)
SONET Logical Objects: STSMON, VT-MON
The Automatic Path Protection Switch Caused by an AIS condition indicates that automatic path
protection switching occurred because of an AIS condition. If the path protection is configured for
revertive switching, it reverts to the working path after the fault clears. The AIS also clears when the
upstream trouble is cleared.
Note This condition is only reported if the path protection is set up for revertive switching.
Generally, an AIS is a special SONET signal that tells the receiving node that the sending node has no
valid signal available to send. AIS is not considered an error. The AIS condition is raised by the receiving
node on each input when the node sees the signal AIS instead of a real signal. In most cases when this
condition is raised, an upstream node is raising an alarm to indicate a signal failure; all nodes
downstream from it only raise some type of AIS. This condition clears when you resolve the problem on
the upstream node.
Clear the AUTOSW-AIS Condition
Step 1 Complete the “Clear the AIS Condition” procedure on page 2-18.
Step 2 If the condition does not clear, log into the Technical Support Website at
http://www.cisco.com/techsupport for more information or call Cisco TAC (1-800-553-2447).
2.7.26 AUTOSW-LOP (STSMON)
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SONET Logical Object: STSMON
The Automatic Path Protection Switch Caused by LOP condition for the STS monitor (STSMON)
condition indicates that automatic path protection protection switching occurred because of the “LOP-P”
alarm on page 2-91. If the path protection is configured for revertive switching, it reverts to the working
path after the fault clears.
Note This condition is only reported if the path protection is set up for revertive switching.