All MIBs › IB-PM-MIB › pmPortCountersXmitDiscards
pmPortCountersXmitDiscards
Module: IB-PM-MIB
OID (symbolic): IB-PM-MIB::pmPortCountersXmitDiscards
OID (numeric): 1.3.6.1.3.117.1.4.1.9
Node type: OBJECT-TYPE
Type: Integer32
Access: read-write
Description: Total number of outbound packets discarded by the port because the port is down or congested. Reasons for this include: - Output port is in the inactive state - Packet length exceeded neighbor MTU - Switch lifetime limit exceeds - Switch HOQ limit exceeds.
What is pmPortCountersXmitDiscards?
Counts outbound packets this port discarded because it was down or congested, including MTU mismatches, lifetime-limit expirations, and head-of-queue limit exceedances. A climbing value here suggests downstream congestion or an MTU mismatch with a neighbor rather than a problem with this port itself.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.3.117.1.4.1.9 snmpwalk -v2c -c public <target> IB-PM-MIB::pmPortCountersXmitDiscards
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.3.117.1.4.1.9.1 snmpget -v2c -c public <target> IB-PM-MIB::pmPortCountersXmitDiscards.1
Set instance 1 (SNMPv2c):
snmpset -v2c -c private <target> 1.3.6.1.3.117.1.4.1.9.1 i <value>
Start monitoring InfiniBand switch/host channel adapter (HCA), performance management with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the IB-PM-MIB::pmPortCountersXmitDiscards OID value, configure state conditions and alerts, and monitor any InfiniBand switch/host channel adapter (HCA), performance management from a single console.
OID Breakdown
Upper-level ancestors (5 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 |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.3.117 | pm | IB-PM-MIB |
| 1.3.6.1.3.117.1 | pmMIBObjects | IB-PM-MIB |
| 1.3.6.1.3.117.1.4 | pmPortCountersTable | IB-PM-MIB |
| 1.3.6.1.3.117.1.4.1 | pmPortCountersoEntry | IB-PM-MIB |
| 1.3.6.1.3.117.1.4.1.9 | pmPortCountersXmitDiscards | IB-PM-MIB |