IEEE8021-SPANNING-TREE-MIB :: ieee8021SpanningTreeRstpPortIsolatePort

MIB Reference — IPNetwork Monitor · Updated October 05, 2026

All MIBs › IEEE8021-SPANNING-TREE-MIB › ieee8021SpanningTreeRstpPortIsolatePort

ieee8021SpanningTreeRstpPortIsolatePort

Module: IEEE8021-SPANNING-TREE-MIB

OID (symbolic): IEEE8021-SPANNING-TREE-MIB::ieee8021SpanningTreeRstpPortIsolatePort

OID (numeric): 1.3.111.2.802.1.1.3.1.3.1.3

Node type: OBJECT-TYPE

Type: TruthValue

Access: read-only

Description: The operational value of the Isolate Port parameter.

A value of true(1), Set by the Bridge detection state machine (BDM, 13.31), indicates when the Spanning Tree Protocol Entity of a neighboring Bridge has apparently failed .

What is ieee8021SpanningTreeRstpPortIsolatePort?

Set by the bridge detection state machine to true when the Spanning Tree entity on a neighboring bridge appears to have failed, marking this port as isolated from its peer.

Examples

Walk all instances (SNMPv2c):

snmpwalk -v2c -c public <target> 1.3.111.2.802.1.1.3.1.3.1.3
snmpwalk -v2c -c public <target> IEEE8021-SPANNING-TREE-MIB::ieee8021SpanningTreeRstpPortIsolatePort

Get a specific instance (index 1):

snmpget -v2c -c public <target> 1.3.111.2.802.1.1.3.1.3.1.3.1
snmpget -v2c -c public <target> IEEE8021-SPANNING-TREE-MIB::ieee8021SpanningTreeRstpPortIsolatePort.1

Start monitoring Vendor-neutral IEEE 802.1D/Q standard (Ethernet bridge or switch running STP) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the IEEE8021-SPANNING-TREE-MIB::ieee8021SpanningTreeRstpPortIsolatePort OID value, configure state conditions and alerts, and monitor any Vendor-neutral IEEE 802.1D/Q standard (Ethernet bridge or switch running STP) from a single console.

OID Breakdown

Upper-level ancestors (3 from the standard OID tree / other modules)
Numeric OIDNameModule
1isoLANART-AGENT
1.3orgAirPair-MIB
1.3.111.2.802.1.1ieee802dot1mibsIEEE8021-TC-MIB
Numeric OIDNameModule
1.3.111.2.802.1.1.3ieee8021SpanningTreeMibIEEE8021-SPANNING-TREE-MIB
1.3.111.2.802.1.1.3.1ieee8021SpanningTreeObjectsIEEE8021-SPANNING-TREE-MIB
1.3.111.2.802.1.1.3.1.3ieee8021SpanningTreePortExtensionTableIEEE8021-SPANNING-TREE-MIB
1.3.111.2.802.1.1.3.1.3.1ieee8021SpanningTreePortExtensionEntryIEEE8021-SPANNING-TREE-MIB
1.3.111.2.802.1.1.3.1.3.1.3ieee8021SpanningTreeRstpPortIsolatePortIEEE8021-SPANNING-TREE-MIB