PERSEUS-MIB :: lsMonPortTxUnderruns

MIB Reference — IPNetwork Monitor · Updated October 06, 2026

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lsMonPortTxUnderruns

Module: PERSEUS-MIB

OID (symbolic): PERSEUS-MIB::lsMonPortTxUnderruns

OID (numeric): 1.3.6.1.4.1.43.18.3.2.1.11

Node type: OBJECT-TYPE

Type: Counter

Access: read-only

Description: The total number of frames that were transmitted with an bad CRC because the MMAC did not have enough data to continue transmission.

What is lsMonPortTxUnderruns?

Counts frames transmitted from this port with a bad CRC because the switching hardware (MMAC) ran out of data mid-transmission, pointing to an internal timing/buffering issue on this port rather than the cable.

Examples

Walk all instances (SNMPv2c):

snmpwalk -v2c -c public <target> 1.3.6.1.4.1.43.18.3.2.1.11
snmpwalk -v2c -c public <target> PERSEUS-MIB::lsMonPortTxUnderruns

Get a specific instance (index 1):

snmpget -v2c -c public <target> 1.3.6.1.4.1.43.18.3.2.1.11.1
snmpget -v2c -c public <target> PERSEUS-MIB::lsMonPortTxUnderruns.1

Start monitoring 3Com Perseus LinkSwitch 1000 stackable Ethernet switch with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the PERSEUS-MIB::lsMonPortTxUnderruns OID value, configure state conditions and alerts, and monitor any 3Com Perseus LinkSwitch 1000 stackable Ethernet switch 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
1.3.6.1.4.1.43a3ComA3COM-AUDL-R1-MIB
1.3.6.1.4.1.43.18linkSwitch1000_mibA3Com-products-MIB
Numeric OIDNameModule
1.3.6.1.4.1.43.18.3linkSwitchMonitorGroupPERSEUS-MIB
1.3.6.1.4.1.43.18.3.2lsMonitorPortTablePERSEUS-MIB
1.3.6.1.4.1.43.18.3.2.1lsMonitorPortTableEntryPERSEUS-MIB
1.3.6.1.4.1.43.18.3.2.1.11lsMonPortTxUnderrunsPERSEUS-MIB