Filter
Top Products
2-107
Cisco ONS 15327 Troubleshooting Guide, R3.4
March 2004
Chapter 2 Alarm Troubleshooting
Alarm Procedures
An SF Line (SF-L) condition is similar to an SF condition (see page 2-106) but it applies to the line layer
of the signal.
Procedure: Clear the SF-L Condition
Step 1 Complete the “Clear the SD Condition” procedure on page 2-105.
Step 2 If the condition does not clear, log onto http://www.cisco.com/tac for more information or call TAC
(1-800-553-2447).
2.6.153 SF-P
• Not Alarmed (NA), Non-Service Affecting (NSA)
An SF Path (SF-P) condition is similar to an SF condition (see page 2-106), but it 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 circuits, the BER threshold on the ONS 15327 is user provisionable and has a range for SF
from 10
–5
to 10
–3
. For BLSR 1+1 or unprotected circuits, the BER threshold value is not user
provisionable and the error rate is hard-coded to 10
–3
.
For UPSR, SF-P causes a switch from the working card to the protect card at the path (STS) level. For
BLSR 1+1 or unprotected circuits, SF-P does not cause switching.
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.
Procedure: Clear the SF-P Condition
Step 1 Complete the “Clear the SD Condition” procedure on page 2-105.
Step 2 If the condition does not clear, log onto http://www.cisco.com/tac for more information or call TAC
(1-800-553-2447).
2.6.154 SFTWDOWN
• Minor (MN), Non-Service Affecting (NSA)
A Software Download in Progress (SFTWDOWN) alarm occurs when the XTC is downloading or
transferring software.
No action is necessary. Wait for the transfer or the software download to complete. If the alarm does not
clear, log onto http://www.cisco.com/tac for more information or call TAC (1-800-553-2447).
Caution It can take up to 30 minutes for software to be updated on a standby XTC card.