Cisco ONS 15310-MA Troubleshooting Manual page 28

Alarm Procedures
If the alarm does not clear, log into the Technical Support Website at
Step 3
http://www.cisco.com/cisco/web/support/index.html for more information or call Cisco TAC
(1-800-553-2447).
2.7.20 AUTOSW-AIS-SNCP
The Automatic Path Protection Switch Caused by an AIS condition indicates that automatic SNCP
switching occurred because of an AIS condition. If the SNCP 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.
This condition is only reported if the path protection is set up for revertive switching.
Note
Generally, an AIS is a special SDH 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-SNCP Condition
Complete the
Step 1
If the condition does not clear, log into the Technical Support Website at
Step 2
http://www.cisco.com/cisco/web/support/index.html for more information or call Cisco TAC
(1-800-553-2447).
2.7.21 AUTOSW-LOP-SNCP (VCMON-HP)
The Automatic Path Protection Switch Caused by LOP condition for the STS monitor (VCMON-HP)
condition indicates that automatic SNCP switching occurred because of the
page
clears.
This condition is only reported if the path protection is set up for revertive switching.
Note
Cisco ONS 15310-MA SDH Troubleshooting Guide, Release 9.0
2-28
Default Severity: Not Reported (NR), Non-Service-Affecting (NSA)
SDH Logical Objects: VCMON-HP, VCMON-LP
"Clear the AIS Condition" procedure on page
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SDH Logical Object: VCMON-HP
2-91. If the SNCP is configured for revertive switching, it reverts to the working path after the fault
Chapter 2 Alarm Troubleshooting
2-20.
"AU-LOP" alarm on
78-18663-01