RS232-MIB :: rs232SyncPortTransmitUnderrunErrs

MIB Reference — IPNetwork Monitor · Updated September 14, 2026

All MIBsRS232-MIBrs232SyncPortTransmitUnderrunErrs

rs232SyncPortTransmitUnderrunErrs

Module: RS232-MIB

OID (symbolic): RS232-MIB::rs232SyncPortTransmitUnderrunErrs

OID (numeric): 1.3.6.1.3.20.4.1.4

Node type: OBJECT-TYPE

Type: Counter

Access: read-only

Description: Total number of frames that failed to be transmitted on the port since system re-initialization and while the port state was 'up' or 'test' because data was not available to the transmitter in time.

What is rs232SyncPortTransmitUnderrunErrs?

Counts frames on this synchronous port that failed to transmit because data wasn't available to the transmitter in time, since the last system re-initialization and while the port was 'up' or 'test'.

Examples

Walk all instances (SNMPv2c):

snmpwalk -v2c -c public <target> 1.3.6.1.3.20.4.1.4
snmpwalk -v2c -c public <target> RS232-MIB::rs232SyncPortTransmitUnderrunErrs

Get a specific instance (index 1):

snmpget -v2c -c public <target> 1.3.6.1.3.20.4.1.4.1
snmpget -v2c -c public <target> RS232-MIB::rs232SyncPortTransmitUnderrunErrs.1

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OID Breakdown

Upper-level ancestors (5 from the standard OID tree / other modules)
Numeric OIDNameModule
1isoLANART-AGENT
1.3orgAirPair-MIB
1.3.6dodAirPair-MIB
1.3.6.1internetAirPair-MIB
1.3.6.1.3experimentalAXON-MIB
Numeric OIDNameModule
1.3.6.1.3.20rs232RS232-MIB
1.3.6.1.3.20.4rs232SyncPortTableRS232-MIB
1.3.6.1.3.20.4.1rs232SyncPortEntryRS232-MIB
1.3.6.1.3.20.4.1.4rs232SyncPortTransmitUnderrunErrsRS232-MIB