PORT-MIB :: etherPortLoopback

MIB Reference — IPNetwork Monitor · Updated October 06, 2026

All MIBs › PORT-MIB › etherPortLoopback

etherPortLoopback

Module: PORT-MIB

OID (symbolic): PORT-MIB::etherPortLoopback

OID (numeric): 1.3.6.1.4.1.5812.3.3.1.4

Node type: OBJECT-TYPE

Type: INTEGER

Access: read-write

Description: Enables/disables loopback mode.

What is etherPortLoopback?

This enables or disables loopback mode on an Ethernet port, looping transmitted signal back for testing. A technician turns loopback on temporarily to verify the port's transmit and receive circuitry without needing a connected far-end device. It should normally be left at disable(2) since enabling it takes the port out of normal service.

Examples

Walk all instances (SNMPv2c):

snmpwalk -v2c -c public <target> 1.3.6.1.4.1.5812.3.3.1.4
snmpwalk -v2c -c public <target> PORT-MIB::etherPortLoopback

Get a specific instance (index 1):

snmpget -v2c -c public <target> 1.3.6.1.4.1.5812.3.3.1.4.1
snmpget -v2c -c public <target> PORT-MIB::etherPortLoopback.1

Set instance 1 (SNMPv2c):

snmpset -v2c -c private <target> 1.3.6.1.4.1.5812.3.3.1.4.1 i <value>

Start monitoring Coriolis Networks optical switch/chassis line cards (per-port optical status) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the PORT-MIB::etherPortLoopback OID value, configure state conditions and alerts, and monitor any Coriolis Networks optical switch/chassis line cards (per-port optical status) from a single console.

OID Breakdown

Upper-level ancestors (8 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
1.3.6.1.4.1.5812coriolisMibsCORIOLIS-MIB
1.3.6.1.4.1.5812.3portCORIOLIS-MIB
Numeric OIDNameModule
1.3.6.1.4.1.5812.3.3etherPortTablePORT-MIB
1.3.6.1.4.1.5812.3.3.1etherPortEntryPORT-MIB
1.3.6.1.4.1.5812.3.3.1.4etherPortLoopbackPORT-MIB