NORTEL-NETWORKS-MULTIPLE-SPANNING-TREE-MIB :: nnMstCistPortTopologyChangeSemState

MIB Reference — IPNetwork Monitor · Updated October 06, 2026

All MIBs › NORTEL-NETWORKS-MULTIPLE-SPANNING-TREE-MIB › nnMstCistPortTopologyChangeSemState

nnMstCistPortTopologyChangeSemState

Module: NORTEL-NETWORKS-MULTIPLE-SPANNING-TREE-MIB

OID (symbolic): NORTEL-NETWORKS-MULTIPLE-SPANNING-TREE-MIB::nnMstCistPortTopologyChangeSemState

OID (numeric): 1.3.6.1.4.1.45.5.5.1.3.1.39

Node type: OBJECT-TYPE

Type: INTEGER

Access: read-only

Description: Current state of the Topology Change State Machine for this port in this spanning tree context.

What is nnMstCistPortTopologyChangeSemState?

Reports the current state of the Topology Change state machine for this port on the CIST, tracking how a detected topology change is being propagated and acknowledged.

Examples

Walk all instances (SNMPv2c):

snmpwalk -v2c -c public <target> 1.3.6.1.4.1.45.5.5.1.3.1.39
snmpwalk -v2c -c public <target> NORTEL-NETWORKS-MULTIPLE-SPANNING-TREE-MIB::nnMstCistPortTopologyChangeSemState

Get a specific instance (index 1):

snmpget -v2c -c public <target> 1.3.6.1.4.1.45.5.5.1.3.1.39.1
snmpget -v2c -c public <target> NORTEL-NETWORKS-MULTIPLE-SPANNING-TREE-MIB::nnMstCistPortTopologyChangeSemState.1

SNMPv3 example:

snmpget -v3 -l authPriv -u snmpv3-user -a SHA -A "AuthPassword1" -x AES -X "PrivPassword1" <target> nnMstCistPortTopologyChangeSemState.1

Start monitoring Nortel Networks Layer 2 switch (Multiple Spanning Tree) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the NORTEL-NETWORKS-MULTIPLE-SPANNING-TREE-MIB::nnMstCistPortTopologyChangeSemState OID value, configure state conditions and alerts, and monitor any Nortel Networks Layer 2 switch (Multiple Spanning Tree) from a single console.

OID Breakdown

Upper-level ancestors (8 from the standard OID tree / other modules)
Numeric OIDNameModule
1isoLANART-AGENT
1.3orgAirPair-MIB
1.3.6dodAirPair-MIB
1.3.6.1internetAirPair-MIB
1.3.6.1.4privateAirPair-MIB
1.3.6.1.4.1enterprisesAirPair-MIB
1.3.6.1.4.1.45synopticsCMU-MIB
1.3.6.1.4.1.45.5bayStackMibsSYNOPTICS-ROOT-MIB
Numeric OIDNameModule
1.3.6.1.4.1.45.5.5nnMultipleSpanningTreeMibNORTEL-NETWORKS-MULTIPLE-SPANNING-TREE-MIB
1.3.6.1.4.1.45.5.5.1nnMstObjectsNORTEL-NETWORKS-MULTIPLE-SPANNING-TREE-MIB
1.3.6.1.4.1.45.5.5.1.3nnMstCistPortTableNORTEL-NETWORKS-MULTIPLE-SPANNING-TREE-MIB
1.3.6.1.4.1.45.5.5.1.3.1nnMstCistPortEntryNORTEL-NETWORKS-MULTIPLE-SPANNING-TREE-MIB
1.3.6.1.4.1.45.5.5.1.3.1.39nnMstCistPortTopologyChangeSemStateNORTEL-NETWORKS-MULTIPLE-SPANNING-TREE-MIB