Cisco 15310-MA Guia de Resolução de Problemas descarregar pdf (Página 223)

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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

Clear the LOF (BITS) Alarm

Note This procedure assumes that the BITS timing reference signal is functioning properly. It also assumes

the alarm is not appearing during node turn-up.

Step 1 Verify that the line type and line coding match between the BITS port and the 15310-CL-CTX or

CTX2500 card by completing the following steps:

a. In node view or card view, note the slot and port reporting the alarm.

b. Find the coding and framing formats of the external BITS timing source. The formats should be in

the user documentation for the external BITS timing source or on the timing source itself.

c. Click the Provisioning > Timing > BITS Facilities tabs.

d. Verify that the Coding setting matches the coding of the BITS timing source, either B8ZS or AMI.

e. If the coding does not match, click Coding and choose the appropriate coding from the drop-down

list.

f. Verify that Line Type matches the line type of the BITS timing source, either ESF or SF (D4).

g. If the line type does not match, click Line Type and choose the appropriate framing from the

drop-down list.

Note On the timing subtab, the B8ZS coding field is normally paired with ESF in the Line Type field

and the AMI coding field is normally paired with SF (D4) in the Line Type field.

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) in order to report a Service-Affecting (SA)

problem.

2.7.136 LOF (DS1)

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

SONET Logical Object: DS1

The DS-1 LOF alarm indicates that the receiving ONS 15310-CL or ONS 15310-MA has lost frame

delineation in an incoming DS-1 data stream. If the LOF appears on a DS-1 port, the transmitting

equipment could have its line type set to a format that differs from the receiving node.

Note When the ONS 15310-MA raises an LOF (DS1) or LOS (DS1) alarm, a path protection switch will

occur, but a PDI-P alarm will not be generated due to hardware limitations.

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