Cisco 15310-MA Instrukcja Naprawy Pobierz pdf (Strona 275)

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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 3 If the primary timing reference is a BITS input, complete the “Clear the LOS (BITS) Alarm” procedure

on page 2-101.

Step 4 If the primary reference clock is an incoming port on the ONS 15310-CL or ONS 15310-MA, complete

the “Clear the LOS (OCN) Alarm” procedure on page 2-106.

Step 5 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).

2.7.243 SYNCSEC

Default Severity: Minor (MN), Non-Service-Affecting (NSA)

SONET Logical Objects: EXT-SREF, NE-SREF

A Loss of Timing on Secondary Reference alarm occurs when the ONS 15310-CL or ONS 15310-MA

loses a secondary timing source (reference 2). If SYNCSEC occurs, the system should switch to a third

timing source (reference 3) to obtain valid timing. Switching to a third timing source also triggers the

“SWTOTHIRD” alarm on page 2-143.

Clear the SYNCSEC Alarm

Step 1 In node view, click the Provisioning > Timing > General tabs.

Step 2 Verify the current configuration of REF-2 for the NE Reference.

Step 3 If the second reference is a BITS input, complete the “Clear the LOS (BITS) Alarm” procedure on

page 2-101.

Step 4 Verify that the BITS clock is operating properly.

Step 5 If the secondary timing source is an incoming port on the ONS 15310-CL or ONS 15310-MA, complete

the “Clear the LOS (OCN) Alarm” procedure on page 2-106.

Step 6 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).

2.7.244 SYNCTHIRD

Default Severity: Minor (MN), Non-Service-Affecting (NSA)

SONET Logical Objects: EXT-SREF, NE-SREF

A Loss of Timing on Third Reference alarm occurs when the ONS 15310-CL or ONS 15310-MA loses

the third timing source (reference 3). If SYNCTHIRD occurs and the system uses an internal reference

for source three, the 15310-CL-CTX card or CTX2500 card could have failed. The system often reports

either the “FRNGSYNC” condition on page 2-72 or the “HLDOVRSYNC” condition on page 2-79 after

a SYNCTHIRD alarm.

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