Fore-SONET-MIB :: sonetSectionLOSs

MIB Reference — IPNetwork Monitor · Updated September 14, 2026

All MIBsFore-SONET-MIBsonetSectionLOSs

sonetSectionLOSs

Module: Fore-SONET-MIB

OID (symbolic): Fore-SONET-MIB::sonetSectionLOSs

OID (numeric): 1.3.6.1.4.1.326.2.2.1.1.4.2.1.1.5

Node type: OBJECT-TYPE

Type: Counter32

Access: read-only

Description: The number of seconds in which Loss Of Signal (LOS) has occurred. A LOS is declared when 20 +/- 3us of all zeros patterns is detected. LOS is cleared when two valid framing words are detected and during the intervening time no LOS condition is detected.

What is sonetSectionLOSs?

Counts the number of seconds during which this port experienced Loss Of Signal, declared when ~20us of all-zero pattern is detected and cleared once two valid framing words are seen. An admin treats a nonzero count here as evidence of a physical link outage on this port rather than a protocol-level issue.

Examples

Walk all instances (SNMPv2c):

snmpwalk -v2c -c public <target> 1.3.6.1.4.1.326.2.2.1.1.4.2.1.1.5
snmpwalk -v2c -c public <target> Fore-SONET-MIB::sonetSectionLOSs

Get a specific instance (index 1):

snmpget -v2c -c public <target> 1.3.6.1.4.1.326.2.2.1.1.4.2.1.1.5.1
snmpget -v2c -c public <target> Fore-SONET-MIB::sonetSectionLOSs.1

Start monitoring Fore Systems (later Marconi) ForeRunner ATM switch with SONET/SDH port modules with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the Fore-SONET-MIB::sonetSectionLOSs OID value, configure state conditions and alerts, and monitor any Fore Systems (later Marconi) ForeRunner ATM switch with SONET/SDH port modules from a single console.

OID Breakdown

Upper-level ancestors (11 from the standard OID tree / other modules)
Numeric OIDNameModule
1isoLANART-AGENT
1.3orgAirPair-MIB
1.3.6dodAirPair-MIB
1.3.6.1internetAirPair-MIB
1.3.6.1.4privateAirPair-MIB
1.3.6.1.4.1enterprisesAirPair-MIB
1.3.6.1.4.1.326marconiES1000-MIB
1.3.6.1.4.1.326.2systemsES1000-MIB
1.3.6.1.4.1.326.2.2atmSwitchFore-Common-MIB
1.3.6.1.4.1.326.2.2.1hardwareFore-Common-MIB
1.3.6.1.4.1.326.2.2.1.1asxFore-Common-MIB
Numeric OIDNameModule
1.3.6.1.4.1.326.2.2.1.1.4foreSonetModuleFore-SONET-MIB
1.3.6.1.4.1.326.2.2.1.1.4.2sonetStatsGroupFore-SONET-MIB
1.3.6.1.4.1.326.2.2.1.1.4.2.1sonetSectionTableFore-SONET-MIB
1.3.6.1.4.1.326.2.2.1.1.4.2.1.1sonetSectionEntryFore-SONET-MIB
1.3.6.1.4.1.326.2.2.1.1.4.2.1.1.5sonetSectionLOSsFore-SONET-MIB