A3COM-SWITCHING-SYSTEMS-FDDI-MIB

MIB Reference — IPNetwork Monitor · Updated October 05, 2026

All MIBs › A3COM-SWITCHING-SYSTEMS-FDDI-MIB

Category: Network Interfaces, Vendor: 3Com

Description: Manages Fiber Distributed Data Interface (FDDI) ring parameters and station management on 3Com SuperStack switching platforms.

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What Is A3COM-SWITCHING-SYSTEMS-FDDI-MIB?

The A3COM-SWITCHING-SYSTEMS-FDDI-MIB manages Fiber Distributed Data Interface (FDDI) ring parameters and Station Management (SMT) state on 3Com SuperStack switching platforms, a technology used for high-speed fiber-ring backbone connections. It exposes SMT identity/configuration data such as manufacturer OUI and manufacturer-specific data and hold state, plus bridging-function mapping between FDDI SMT entities and MAC bridge ports. Its monitoring value centers on FDDI ring hardware/software health, since a3ComFddiSMTHoldState reveals whether an FDDI station is in normal ring participation or has been forced into a hold/bypass condition often indicative of a ring fault or wrap condition, while a3ComFddiSMTSetCount and a3ComFddiSMTLastSetStationId help track configuration changes on the ring. It builds on the standard FDDI/SMT concepts defined by ANSI FDDI standards, extended with 3Com-specific manufacturer fields. It is deployed on legacy 3Com SuperStack switches that used FDDI as a resilient dual-ring backbone technology, common in 1990s-era campus networks. Engineers can download the A3COM-SWITCHING-SYSTEMS-FDDI-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in A3COM-SWITCHING-SYSTEMS-FDDI-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

  • 3Com SuperStack switch with FDDI ring interface (legacy)

Monitoring Examples

An admin polls a3ComFddiSMTTable/a3ComFddiSMTEntry, keyed by a3ComFddiSMTIndex, to check a3ComFddiSMTHoldState for each ring station; a station stuck in hold state indicates it has dropped off the primary ring and traffic is wrapping onto the secondary ring. Cross-referencing a3ComFddiMACBridgeFunctionTable/a3ComFddiMACBridgeFunctionEntry via a3ComFddiMACBridgeFunctionSMTIndex and a3ComFddiMACBridgeFunctionMACIndex confirms which bridge MAC ports are mapped to which FDDI SMT station, useful when isolating a ring fault to a specific bridge port.

What Can Be Monitored

  • FDDI SMT hold/ring state
  • SMT configuration change/set count
  • manufacturer OUI/identity data
  • FDDI-to-MAC-bridge port mapping
Imported Objects

From FDDI-SMT73-MIB

FddiSMTStationIdType
FddiTimeNano
fddimibMACAvailablePathsOBJECT-TYPE
fddimibMACCopiedCtsOBJECT-TYPE
fddimibMACCurrentPathOBJECT-TYPE
fddimibMACDaFlagOBJECT-TYPE
fddimibMACDownstreamNbrOBJECT-TYPE
fddimibMACErrorCtsOBJECT-TYPE
fddimibMACFrameCtsOBJECT-TYPE
fddimibMACFrameErrorFlagOBJECT-TYPE
fddimibMACFrameErrorRatioOBJECT-TYPE
fddimibMACLostCtsOBJECT-TYPE
fddimibMACNotCopiedCtsOBJECT-TYPE
fddimibMACNotCopiedFlagOBJECT-TYPE
fddimibMACNotCopiedRatioOBJECT-TYPE
fddimibMACOldDownstreamNbrOBJECT-TYPE
fddimibMACOldUpstreamNbrOBJECT-TYPE
fddimibMACRequestedPathsOBJECT-TYPE
fddimibMACSMTAddressOBJECT-TYPE
fddimibMACUnaDaFlagOBJECT-TYPE
fddimibMACUpstreamNbrOBJECT-TYPE
fddimibPORTAvailablePathsOBJECT-TYPE
fddimibPORTConnectStateOBJECT-TYPE
fddimibPORTCurrentPathOBJECT-TYPE
fddimibPORTLemCtsOBJECT-TYPE
fddimibPORTLemRejectCtsOBJECT-TYPE
fddimibPORTLerAlarmOBJECT-TYPE
fddimibPORTLerCutoffOBJECT-TYPE
fddimibPORTLerEstimateOBJECT-TYPE
fddimibPORTLerFlagOBJECT-TYPE
fddimibPORTMyTypeOBJECT-TYPE
fddimibPORTNeighborTypeOBJECT-TYPE
fddimibPORTPCWithholdOBJECT-TYPE
fddimibPORTRequestedPathsOBJECT-TYPE
fddimibSMTCFStateOBJECT-TYPE
fddimibSMTPeerWrapFlagOBJECT-TYPE
fddimibSMTStationIdOBJECT-TYPE

From RFC-1212

OBJECT-TYPE

From RFC-1215

TRAP-TYPE

From RFC1155-SMI

Counter
enterprises
OIDs

RFC description

3Com vendor-private MIB for managing FDDI (Fiber Distributed Data Interface) switching systems and network interfaces.

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Download A3COM-SWITCHING-SYSTEMS-FDDI-MIB