---
oid: "1.3.6.1.4.1.2.6.148.3.1.0.4"
short-description: "swLbridgetopologyChange TRAP-TYPE"
last-modified: "2026-09-11"
parent-oid: "1.3.6.1.4.1.2.6.148.3.1.0"
---

## OID: `1.3.6.1.4.1.2.6.148.3.1.0.4`

```asn1
{iso(1) identified-organization(3) dod(6) internet(1) private(4) enterprise(1) 2 ibmProd(6) ibm8275(148) enetSwitchMgmt(3) sw(1) 0 swLbridgetopologyChange(4)}
```

### Description

```asn1
swLbridgetopologyChange TRAP-TYPE
ENTERPRISE sw
VARIABLES {agentTrapDescrText, swLbStpPortBridgeIndex, swLbStpPort}
DESCRIPTION
"A topologyChange trap is sent by a bridge when
any of its configured ports transitions from the
Learning state to the Forwarding state, or from
the Forwarding state to the Blocking state. The
trap is not sent if a newRoot trap is sent for the
same transition. Implementation of this trap is
optional."
```

**Classification:** MIB object for network management

### Child OIDs

No child OID

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