SONET-MIB :: sonetMediumLoopbackConfig

MIB Reference — IPNetwork Monitor · Updated September 14, 2026

All MIBsSONET-MIBsonetMediumLoopbackConfig

sonetMediumLoopbackConfig

Module: SONET-MIB

OID (symbolic): SONET-MIB::sonetMediumLoopbackConfig

OID (numeric): 1.3.6.1.2.1.10.39.1.1.1.1.8

Node type: OBJECT-TYPE

Type: Bits

Access: read-write

Description: The current loopback state of the SONET/SDH interface. The values mean:

sonetNoLoop Not in the loopback state. A device that is not capable of performing a loopback on this interface shall always return this value.

sonetFacilityLoop The received signal at this interface is looped back out through the corresponding transmitter in the return direction.

sonetTerminalLoop The signal that is about to be transmitted is connected to the associated incoming receiver.

sonetOtherLoop Loopbacks that are not defined here.

What is sonetMediumLoopbackConfig?

A bitmask indicating the interface's current loopback state: no loopback, a facility loopback (looping the received signal back out the transmitter), a terminal loopback (looping the outgoing signal back to the local receiver), or an other/undefined loopback type. An admin sets sonetFacilityLoop or sonetTerminalLoop when testing a circuit end-to-end with the carrier, then clears it back to sonetNoLoop once testing is done.

Examples

Walk all instances (SNMPv2c):

snmpwalk -v2c -c public <target> 1.3.6.1.2.1.10.39.1.1.1.1.8
snmpwalk -v2c -c public <target> SONET-MIB::sonetMediumLoopbackConfig

Get a specific instance (index 1):

snmpget -v2c -c public <target> 1.3.6.1.2.1.10.39.1.1.1.1.8.1
snmpget -v2c -c public <target> SONET-MIB::sonetMediumLoopbackConfig.1

Set instance 1 (SNMPv2c):

snmpset -v2c -c private <target> 1.3.6.1.2.1.10.39.1.1.1.1.8.1 s <value>

Start monitoring vendor-neutral, standards-based MIB, SONET/SDH transport equipment and optical interface line cards (section/line/path performance/fault status) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the SONET-MIB::sonetMediumLoopbackConfig OID value, configure state conditions and alerts, and monitor any vendor-neutral, standards-based MIB, SONET/SDH transport equipment and optical interface line cards (section/line/path performance/fault status) from a single console.

OID Breakdown

Upper-level ancestors (7 from the standard OID tree / other modules)
Numeric OIDNameModule
1isoLANART-AGENT
1.3orgAirPair-MIB
1.3.6dodAirPair-MIB
1.3.6.1internetAirPair-MIB
1.3.6.1.2mgmtAXON-MIB
1.3.6.1.2.1mib_2AXON-MIB
1.3.6.1.2.1.10transmissionCHECKPOINT-MIB-2
Numeric OIDNameModule
1.3.6.1.2.1.10.39sonetMIBSONET-MIB
1.3.6.1.2.1.10.39.1sonetObjectsSONET-MIB
1.3.6.1.2.1.10.39.1.1sonetMediumSONET-MIB
1.3.6.1.2.1.10.39.1.1.1sonetMediumTableSONET-MIB
1.3.6.1.2.1.10.39.1.1.1.1sonetMediumEntrySONET-MIB
1.3.6.1.2.1.10.39.1.1.1.1.8sonetMediumLoopbackConfigSONET-MIB