All MIBs › IB-IF-MIB › ibIfPortLinkDowned
ibIfPortLinkDowned
Module: IB-IF-MIB
OID (symbolic): IB-IF-MIB::ibIfPortLinkDowned
OID (numeric): 1.3.6.1.3.117.2.1.1.1.4
Node type: OBJECT-TYPE
Type: Counter32
Access: read-only
Description: Total number of times the Port Training state machine has failed the link error recovery process and downed the link.
What is ibIfPortLinkDowned?
This counter tracks how many times link error recovery failed outright and the port's link was brought down as a result. Each increment represents an actual link outage caused by unrecoverable physical errors, making this a key indicator of fabric instability on that port. An admin seeing this counter increase repeatedly on the same port would prioritize replacing its cable or transceiver rather than just monitoring symbol errors.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.3.117.2.1.1.1.4 snmpwalk -v2c -c public <target> IB-IF-MIB::ibIfPortLinkDowned
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.3.117.2.1.1.1.4.1 snmpget -v2c -c public <target> IB-IF-MIB::ibIfPortLinkDowned.1
Start monitoring Server/storage/switch with InfiniBand/IPoIB interfaces (vendor-neutral IETF standard) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the IB-IF-MIB::ibIfPortLinkDowned OID value, configure state conditions and alerts, and monitor any Server/storage/switch with InfiniBand/IPoIB interfaces (vendor-neutral IETF standard) from a single console.
OID Breakdown
Upper-level ancestors (6 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 |
| 1.3.6.1.3 | experimental | APERTUS-NPG-MIB |
| 1.3.6.1.3.117 | pm | IB-PM-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.3.117.2 | ibIfMIB | IB-IF-MIB |
| 1.3.6.1.3.117.2.1 | ibIfObjects | IB-IF-MIB |
| 1.3.6.1.3.117.2.1.1 | ibIfPortStatTable | IB-IF-MIB |
| 1.3.6.1.3.117.2.1.1.1 | ibIfPortStatEntry | IB-IF-MIB |
| 1.3.6.1.3.117.2.1.1.1.4 | ibIfPortLinkDowned | IB-IF-MIB |