Cisco ONS 15310-MA Troubleshooting Manual page 33

Chapter 2 Alarm Troubleshooting
2.7.30 CARLOSS (CE100T, CEMR)
The Carrier Loss alarm is raised on CE-Series cards in Mapper mode when the port is unlocked state and
if there is no carrier signal. Circuit need not be present to raise the alarm.
Clear the CARLOSS (CE100T, CEMR) Alarm
Verify that the fiber cable is properly connected and attached to the correct port. For more information
Step 1
about fiber connections and terminations, refer to the "Install Hardware" chapter in the
Cisco ONS15310-MA SDH Procedure Guide.
Always use the supplied electrostatic discharge wristband when working with a powered
Caution
ONS 15310-MA SDH.
Step 2 If the fiber cable is correctly connected and attached, verify that the cable connects the card to another
Ethernet device.
Step 3 Verify that the attached transmitting Ethernet device is operational. If not, troubleshoot the device.
Step 4 Verify that optical receive levels are within the normal range. The correct specifications are listed in the
"Install Hardware" chapter in the Cisco ONS15310-MA SDH Procedure Guide.
Step 5 If the alarm does not clear, use an Ethernet test set to determine whether a valid signal is coming into
the Ethernet port. For specific procedures to use the test set equipment, consult the manufacturer.
If a valid Ethernet signal is not present and the transmitting device is operational, replace the fiber cable
Step 6
connecting the transmitting device to the Ethernet port. To do this, refer to the "Install Hardware"
chapter in the Cisco ONS15310-MA SDH Procedure Guide for procedures.
If the alarm does not clear, and link autonegotiation is enabled on the port but the autonegotiation process
Step 7
fails, the card turns off its transmitter laser and reports a CARLOSS alarm. If link autonegotiation has
been enabled for the port, determine whether there are conditions that could cause autonegotiation to fail
by completing the following steps:
a.
b.
Step 8 If the alarm does not clear, disable and reenable the Ethernet port to attempt to remove the CARLOSS
condition. (The autonegotiation process restarts.)
If the alarm does not clear and the
Step 9
the TPTFAIL Alarm" procedure on page
next step.
Note
78-18663-01
Default Severity: Major (MJ), Service-Affecting (SA)
SDH Logical Objects: CE100T, CEMR
Confirm that the attached Ethernet device has autonegotiation enabled and is configured for
compatibility with the asymmetric flow control on the card.
Confirm that the attached Ethernet device configuration allows reception of flow control frames.
When the CARLOSS and the TPTFAIL alarms are reported, the reason for the condition could
be the CE-Series card's end-to-end link integrity feature taking action on a remote failure
indicated by the TPTFAIL alarm.
"TPTFAIL" alarm on page 2-139
2-139. If the TPTFAIL alarm is not raised, continue with the
Cisco ONS 15310-MA SDH Troubleshooting Guide, Release 9.0
Alarm Procedures
is also reported, complete the "Clear
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