Reference Guide

946 | SONET/SDH
www.dell.com | support.dell.com
The following example displays the active alarms for the interface.
FTOS(conf-if-te-13/0)#exit
FTOS#show controllers te 13/0
Interface is TenGigabitEthernet 13/0
SECTION
LOF = 0 LOS = 0 BIP(B1) = 13
LINE
AIS = 0 RDI = 1 FEBE = 7633 BIP(B2) = 19264
PATH
AIS = 0 RDI = 0 LOP = 0 FEBE = 8554 BIP(B3) = 15685
Active Defects: LRDI
Active Alarms: LRDI
Alarm reporting enabled for: SLOS SLOF B1-TCA LAIS LRDI B2-TCA PAIS PRDI PLOP B3-TCA SD
SF
Framing is SONET, AIS-shut is enabled
Scramble-ATM is enabled, Down-when-looped is enabled
Loopback is disabled, Clock source is line, Speed is Oc192
CRC is 32-bits, Flag C2 is 0x1a, Flag J0 is 0xcc, Flag S1S0 is 0x0
FTOS#
SONET Alarm Reporting
SONET equipment detects events and alarms at each of SONET's three layers—section, line, and path.
Typically, a SONET device sends alarms both upstream and downstream to notify other devices of the
problem condition. The GR-253-CORE Synchronous Optical Network (SONET) Transport Systems
Common Generic Criteria specification defines several alarms:
• Section Loss of Signal (SLOS)
• Section Loss of Frame (SLOF)
• Alarm Indication Signal - Line (AIS-L)
• Signal Degrade Bit Error Rate (SD-BER)
• Signal Failure Bit Error Rate (SF-BER)
• Remote Defect Indication - Line (RDI-L)
While performance monitoring provides advanced alert of link degradation, alarms indicate a failure. Fault
management involves alarm monitoring and generation, reporting, logging, correlation, and clearing.