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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, Release 9.0

78-18394-01

Chapter 2 Alarm Troubleshooting

Alarm Procedures

2.7.36 BLSROSYNC

The BLSROSYNC alarm is not used in the ONS 15310 platforms in this release. It is reserved for

development.

2.7.37 CARLOSS (CE100T, CEMR)

Default Severity: Major (MJ), Service-Affecting (SA)

SONET Logical Objects: CE100T, CEMR

The Carrier Loss alarm is raised on CE-Series cards in Mapper mode when the port is In-Service (IS) state

and if there is no carrier signal. Circuit need not be present to raise the alarm. In releases prior to 6.01 the

Carrier Loss alarm is raised on CE-100T-8 cards in Mapper mode when there is a circuit failure due to link

integrity. It does not get raised when a user simply puts the port in the In-Service and Normal (IS-NR) service

state.

Clear the CARLOSS (CE100T, CEMR) Alarm

Step 1 Verify that the fiber cable is properly connected and attached to the correct port. For more information

about fiber connections and terminations, refer to the “Install Hardware” chapter in the

Cisco ONS 15310-CL and Cisco ONS 15310-MA Procedure Guide.

Caution Always use the supplied electrostatic discharge wristband when working with a powered ONS 15310-CL

or ONS 15310-MA.

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 ONS 15310-CL and Cisco ONS 15310-MA 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.

Step 6 If a valid Ethernet signal is not present and the transmitting device is operational, replace the fiber cable

connecting the transmitting device to the Ethernet port. To do this, refer to the “Install Hardware”

chapter in the Cisco ONS 15310-CL and Cisco ONS 15310-MA Procedure Guide for procedures.

Step 7 If the alarm does not clear, and link autonegotiation is enabled on the port but the autonegotiation process

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. Confirm that the attached Ethernet device has autonegotiation enabled and is configured for

compatibility with the asymmetric flow control on the card.

b. Confirm that the attached Ethernet device configuration allows reception of flow control frames.

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.)

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