Cisco 15310-MA Anleitung zur Fehlerbehebung PDF herunterladen (Seite 240)

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

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Chapter 2 Alarm Troubleshooting

Alarm Procedures

A Loopback Facility condition for a DS-1 or DS-3 signal occurs when a software facility (line) loopback

is active for a DS-1 or DS-3 port on a 15310-CL-CTX, DS1-28/DS3-EC1-3, or DS1-84/DS3-EC1-3 card.

For information about troubleshooting optical circuits with loopbacks, refer to the “1.2 Identify Points

of Failure on an Electrical Circuit Path” section on page 1-3. Facility loopbacks are described in the

“1.1 Network Troubleshooting Tests” section on page 1-2.

Note CTC permits loopbacks to be performed on an in-service (IS) circuit. Performing a loopback is

Service-Affecting (SA). If you did not perform a lock out or Force switch to protect traffic, the

LPBKFACILITY condition can be accompanied by a more serious alarms such as LOS.

Note DS-3 facility (line) loopbacks do not transmit an AIS in the direction away from the loopback. Instead

of AIS, a continuance of the signal transmitted to the loopback is provided.

Clear the LPBKFACILITY (DS1, DS3) Condition

Step 1 Complete the “Clear a DS-3 or DS-1 Port Loopback Circuit” procedure on page 2-165.

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).

2.7.161 LPBKFACILITY (EC1)

Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)

SONET Logical Object: EC1

A Loopback Facility condition for an EC-1 port occurs when a software facility (line) loopback is active

for a port on the reporting 15310-CL-CTX, DS1-28/DS3-EC1-3, or DS1-84/DS3-EC1-3 card.

For information about troubleshooting optical circuits with loopbacks, refer to the “1.1 Network

Troubleshooting Tests” section on page 1-2.

Caution CTC permits loopbacks to be performed on an in-service (IS) circuit. Loopbacks are

Service-Affecting (SA).

Clear the LPBKFACILITY (EC1) Condition

Step 1 Complete the “Clear an EC-1 Port Loopback” procedure on page 2-166.

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).

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Cisco 15310-MA Anleitung zur Fehlerbehebung Seite 240