STP-TOPOLOGY-CHANGE-TRAP-MIB

Description: Defines trap notifications for Spanning Tree Protocol topology change and root bridge election events.

Start monitoring vendor-neutral, standards-based MIB, any SNMPv3-capable network device (SNMP engine identity/boot/clock status) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

STP-TOPOLOGY-CHANGE-TRAP-MIB is a vendor-neutral, standards-adjacent module defining SNMP trap notifications for Spanning Tree Protocol (IEEE 802.1D) events, rather than a vendor-specific product MIB. Its content is limited to notification/trap definitions - specifically topology-change and root-bridge-election events - and it does not define its own set of polled data objects. Its monitoring role is entirely event/fault-oriented: it lets a network management station learn in near real time when a bridge/switch's spanning-tree topology changes or a new root bridge is elected, which is critical software-state information for diagnosing network instability or unintended reconfiguration. It supplements the base STP/bridge MIBs (BRIDGE-MIB, RFC 1493, and related dot1d objects) which define the underlying spanning-tree state that triggers these traps. It is used across enterprise and data-center Ethernet switches running Spanning Tree Protocol wherever an NMS needs alerting on topology instability, as defined in the STP-TOPOLOGY-CHANGE-TRAP-MIB MIB.

This module defines notifications rather than a table of polled runtime objects, so there is no object/table data to illustrate a polling scenario - its "data" is the trap PDUs themselves. In practice, a network management station subscribes to receive the topology-change and root-bridge-election traps this MIB defines, and an unexpected flurry of topology-change traps from a switch would indicate a flapping link or a misbehaving port causing repeated STP recalculations. A root-bridge-election trap arriving unexpectedly would flag that the spanning-tree root has shifted, often signaling a failure or misconfiguration on the previous root bridge.

Manages Spanning Tree Protocol topology change notifications; defines trap and alert objects for STP topology changes in switched networks.