Cisco 15310-MA Průvodce řešením problémů stáhnout pdf (Strana 228)

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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

Step 2 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).

2.7.144 LO-LASERTEMP

The Equipment Low Laser Optical Transceiver Temperature alarm applies to the TXP and MXP cards.

For more information about this alarm, refer to the “Alarm Troubleshooting” chapter of the

Cisco ONS 15454 DWDM Troubleshooting Guide.

2.7.145 LOM

Default Severity: Critical (CR), Service-Affecting (SA) for STSMON and STSTRM; Major (MJ)

for VT-TERM

SONET Logical Objects: STSMON, STSTRM, VT-TERM

The Optical Transport Unit (OTU) Loss of Multiframe is a VCAT member alarm. (VCAT member

circuits are independent circuits that are concatenated from different time slots into a higher-rate signal.)

The alarm applies to OCN ports when the Multi Frame Alignment Signal (MFAS) overhead field is

errored for more than five frames and persists for more than 3 milliseconds.

Note Optical cards do not recognize the LOM. The system redirects the LOM alarm to the incoming side so

that any optical card can display this alarm as a TERM alarm.

Clear the LOM Alarm

To clear the alarm, log into the Technical Support Website at http://www.cisco.com/techsupport for more

information or call Cisco TAC (1-800-553-2447) in order to report a Service-Affecting (SA) problem.

2.7.146 LOP-P

Default Severity: Critical (CR), Service-Affecting (SA)

SONET Logical Objects: STSMON, STSTRM

A Loss of Pointer Path alarm indicates that the SONET path pointer in the overhead has been lost. LOP

occurs when valid H1/H2 pointer bytes are missing from the overhead. Receiving equipment monitors

the H1/H2 pointer bytes to locate the SONET payload. An LOP-P alarm occurs when eight, nine, or ten

consecutive frames do not have valid pointer values. The alarm clears when three consecutive valid

pointers are received.

The LOP-P alarm can occur when the received payload does not match the provisioned payload. The

alarm is caused by a circuit type mismatch on the concatenation facility. For example, if an STS-1 is sent

across a circuit provisioned for STS-3c, an LOP-P alarm occurs.

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Cisco 15310-MA Průvodce řešením problémů Strana 228