All MIBs › A3COM0039-GENERIC-BRIDGE
Category: LAN Management
Description: Provides generic bridging management objects for 3Com switch platforms.
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What Is A3COM0039-GENERIC-BRIDGE?
A3COM0039-GENERIC-BRIDGE is a 3Com vendor MIB providing generic bridging-management objects for 3Com switch platforms, giving control over core Layer-2 bridging behavior. It exposes objects to clear learned-address counters, select spanning-tree mode, configure MAC address learning and aging behavior, and select the type/level of the forwarding database, alongside grouped "package" objects for control, monitoring, and the database itself. Its monitoring role covers the switch's bridging/forwarding subsystem: an operator can check the current spanning-tree/learning/aging mode and the forwarding-database type and level to confirm the switch's Layer-2 behavior is configured as expected, and use the clear-counters object to reset bridging statistics for a fresh baseline. It's a vendor-specific generic bridging model that parallels, but is distinct from, the standards-track BRIDGE-MIB (RFC 1493/4188), so the two may coexist on the same 3Com device. It's deployed on legacy 3Com switch platforms needing bridging configuration and basic status visibility beyond or alongside the standard bridge MIB. Engineers can download the A3COM0039-GENERIC-BRIDGE file directly to load it into their MIB browser.
IPNetwork Monitor allows you to monitor SNMP objects defined in A3COM0039-GENERIC-BRIDGE. 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 legacy Ethernet switch
Monitoring Examples
Reading brSTAPMode, brLearnMode, and brAgingMode together shows how the switch is currently handling spanning-tree, MAC learning, and address aging, letting an admin spot a switch inadvertently left in the wrong learning/aging mode after a config change. brDatabaseType and brDatabaseLevel describe the forwarding-database configuration, useful for confirming database capacity/mode is appropriate for the network size, while brClearCounters lets an operator reset bridging counters to get a clean baseline before troubleshooting. The brControlPackage/brMonitorPackage/brDataBase groupings suggest the MIB organizes its objects into control, monitoring, and database conformance groups.
What Can Be Monitored
- spanning tree mode
- MAC address learning mode
- address aging mode
- forwarding database type/level
- bridge counter reset status
Imported Objects
OIDs
RFC description
Controls bridge database operations, spanning tree, learning modes, and address aging in 3Com network bridges.
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