Cisco 15310-MA Guia de Resolução de Problemas descarregar pdf (Página 263)

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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

2.7.209 SD-P

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

SONET Logical Objects: STSMON, STSTRM

An SD Path condition applies to the path (STS) layer of the SONET overhead. A path or ST-level SD

alarm travels on the B3 byte of the SONET overhead.

For UPSR-protected circuits, the BER threshold is user-provisionable and has a range for SD from

1E–9 dBm to 1E–5 dBm. For 1+1 and unprotected circuits, the BER threshold value is not

user-provisionable and the error rate is hard-coded to 1E–6 dBm. An SD-P condition causes a switch

from the working port to the protect port at the path (STS) level.

The BER increase that causes the condition is sometimes caused by a physical fiber problem such as a

poor fiber connection, a bend in the fiber that exceeds the permitted bend radius, or a bad fiber splice.

SD causes the port to switch from working to protect. The SD condition clears when the BER level falls

to one-tenth of the threshold level that triggered it.

Clear the SD-P Condition

Step 1 Complete the “Clear the SD-L Condition” procedure on page 2-132.

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).

2.7.210 SD-V

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

SONET Logical Objects: VT-MON, VT-TERM

An SD-V condition is similar to the “SD” condition on page 2-130, but it applies to the VT layer of the

SONET overhead.

For UPSR protected circuits, the BER threshold is user-provisionable and has a range for SD from

1E–9 dBm to 1E–5 dBm. An SD-V condition does not cause a switch from the working port to the

protect port at the path (STS) level.

The BER increase that causes the alarm is sometimes caused by a physical fiber problem such as a poor

fiber connection, a bend in the fiber that exceeds the permitted bend radius, or a bad fiber splice.

SD causes the port to switch from working to protect. The SD condition clears when the BER level falls

to one-tenth of the threshold level that triggered it.

Clear the SD-V Condition

Step 1 Complete the “Clear the SD (DS1, DS3) Condition” procedure on page 2-131.

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 Guia de Resolução de Problemas Página 263