All MIBs › ETH-SWITCH-MIB › portIfDuplex
portIfDuplex
Module: ETH-SWITCH-MIB
OID (symbolic): ETH-SWITCH-MIB::portIfDuplex
OID (numeric): 1.3.6.1.4.1.208.39.3.3.1.5
Node type: OBJECT-TYPE
Type: INTEGER
Access: read-only
Description: Port Duplex mode. For ports in auto mode the mode may change automatically between autoDetect(1), autoDetectedHalf(3) and autoDetectedFull(5).
What is portIfDuplex?
Reports the port's current duplex mode -- half, full, or, if auto-negotiating, whichever the port has settled into. An admin reads this to confirm whether a link successfully negotiated full duplex or fell back to half, a common cause of poor performance when mismatched.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.208.39.3.3.1.5 snmpwalk -v2c -c public <target> ETH-SWITCH-MIB::portIfDuplex
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.208.39.3.3.1.5.1 snmpget -v2c -c public <target> ETH-SWITCH-MIB::portIfDuplex.1
Start monitoring Ethernet switch with port/VLAN management (vendor not confirmed) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the ETH-SWITCH-MIB::portIfDuplex OID value, configure state conditions and alerts, and monitor any Ethernet switch with port/VLAN management (vendor not confirmed) from a single console.
OID Breakdown
Upper-level ancestors (7 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 |
| 1.3.6.1.4.1.208 | scanet | SCANET-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.208.39 | ethSwitch | ETH-SWITCH-MIB |
| 1.3.6.1.4.1.208.39.3 | ports | ETH-SWITCH-MIB |
| 1.3.6.1.4.1.208.39.3.3 | portIfTable | ETH-SWITCH-MIB |
| 1.3.6.1.4.1.208.39.3.3.1 | portIfEntry | ETH-SWITCH-MIB |
| 1.3.6.1.4.1.208.39.3.3.1.5 | portIfDuplex | ETH-SWITCH-MIB |