All MIBs › CM-PERFORMANCE-MIB › ocnStmHistoryLinePSC
ocnStmHistoryLinePSC
Module: CM-PERFORMANCE-MIB
OID (symbolic): CM-PERFORMANCE-MIB::ocnStmHistoryLinePSC
OID (numeric): 1.3.6.1.4.1.2544.1.12.5.1.47.1.9
Node type: OBJECT-TYPE
Type: PerfCounter64
Access: read-only
Description: Protection Switch Counts retrieved from the SFP.
What is ocnStmHistoryLinePSC?
This PerfCounter64 counts Protection Switch Counts pulled from the SFP, i.e. how many times automatic protection switching (APS) moved traffic between the working and protect SONET/STM line during the history bin. A rising PSC value tells an admin the line is flapping between working and protect paths, which is itself a service risk even when each individual switch is momentarily transparent to traffic. If ocnStmHistoryLinePSC jumps from 0 to 6 in one history bin on a ring node, that is a strong signal to investigate the working fiber for intermittent loss of signal rather than trusting APS to mask the problem indefinitely.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.2544.1.12.5.1.47.1.9 snmpwalk -v2c -c public <target> CM-PERFORMANCE-MIB::ocnStmHistoryLinePSC
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.2544.1.12.5.1.47.1.9.1 snmpget -v2c -c public <target> CM-PERFORMANCE-MIB::ocnStmHistoryLinePSC.1
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OID Breakdown
Upper-level ancestors (9 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.4 | private | AirPair-MIB |
| 1.3.6.1.4.1 | enterprises | AirPair-MIB |
| 1.3.6.1.4.1.2544 | advaMIB | ADVA-MIB |
| 1.3.6.1.4.1.2544.1 | products | ADVA-MIB |
| 1.3.6.1.4.1.2544.1.12 | fsp150cm | ADVA-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.2544.1.12.5 | cmPerformanceMIB | CM-PERFORMANCE-MIB |
| 1.3.6.1.4.1.2544.1.12.5.1 | cmPerfObjects | CM-PERFORMANCE-MIB |
| 1.3.6.1.4.1.2544.1.12.5.1.47 | ocnStmHistoryTable | CM-PERFORMANCE-MIB |
| 1.3.6.1.4.1.2544.1.12.5.1.47.1 | ocnStmHistoryEntry | CM-PERFORMANCE-MIB |
| 1.3.6.1.4.1.2544.1.12.5.1.47.1.9 | ocnStmHistoryLinePSC | CM-PERFORMANCE-MIB |