CTRON-CSMACD-MIB :: ctFnbPortChanges

MIB Reference — IPNetwork Monitor · Updated October 05, 2026

All MIBs › CTRON-CSMACD-MIB › ctFnbPortChanges

ctFnbPortChanges

Module: CTRON-CSMACD-MIB

OID (symbolic): CTRON-CSMACD-MIB::ctFnbPortChanges

OID (numeric): 1.3.6.1.4.1.52.4.1.2.4.1.1.1.1.3

Node type: OBJECT-TYPE

Type: Counter

Access: read-only

Description: Denotes the number of times any port on the given MIM has changed it's connection to the inter-RIC bus.

What is ctFnbPortChanges?

ctFnbPortChanges is a read-only counter tallying how many times any port on this particular MIM (multi-port interface module) has changed its connection to the inter-RIC bus. A rising count signals port-level bus-connection instability on that module, which an admin would investigate since ports flapping their backplane connection can cause intermittent link drops. For example, if ctFnbPortChanges jumps by 40 within an hour on one MIM, that is a strong sign a card or backplane connector on that module is failing and needs physical inspection.

Examples

Walk all instances (SNMPv2c):

snmpwalk -v2c -c public <target> 1.3.6.1.4.1.52.4.1.2.4.1.1.1.1.3
snmpwalk -v2c -c public <target> CTRON-CSMACD-MIB::ctFnbPortChanges

Get a specific instance (index 1):

snmpget -v2c -c public <target> 1.3.6.1.4.1.52.4.1.2.4.1.1.1.1.3.1
snmpget -v2c -c public <target> CTRON-CSMACD-MIB::ctFnbPortChanges.1

Start monitoring Cabletron/Enterasys Ethernet switch or hub (CSMA/CD interface stats) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the CTRON-CSMACD-MIB::ctFnbPortChanges OID value, configure state conditions and alerts, and monitor any Cabletron/Enterasys Ethernet switch or hub (CSMA/CD interface stats) from a single console.

OID Breakdown

Upper-level ancestors (12 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
1.3.6.1.4.1.52cabletronCabletron-MIB
1.3.6.1.4.1.52.4mibsCT-PRIORITY-QUEUING
1.3.6.1.4.1.52.4.1ctronCTRON-MIB-NAMES
1.3.6.1.4.1.52.4.1.2ctDataLinkCTRON-MIB-NAMES
1.3.6.1.4.1.52.4.1.2.4ctEthernetCTRON-MIB-NAMES
1.3.6.1.4.1.52.4.1.2.4.1ctCSMACDCTRON-MIB-NAMES
Numeric OIDNameModule
1.3.6.1.4.1.52.4.1.2.4.1.1ctFnbCSMACDCTRON-CSMACD-MIB
1.3.6.1.4.1.52.4.1.2.4.1.1.1ctFnbCSMACDTableCTRON-CSMACD-MIB
1.3.6.1.4.1.52.4.1.2.4.1.1.1.1ctFnbCSMACDEntryCTRON-CSMACD-MIB
1.3.6.1.4.1.52.4.1.2.4.1.1.1.1.3ctFnbPortChangesCTRON-CSMACD-MIB