All MIBs › NORTEL-NETWORKS-RAPID-SPANNING-TREE-MIB › nnRstDot1wPortRxTcnBpduCount
nnRstDot1wPortRxTcnBpduCount
Module: NORTEL-NETWORKS-RAPID-SPANNING-TREE-MIB
OID (symbolic): NORTEL-NETWORKS-RAPID-SPANNING-TREE-MIB::nnRstDot1wPortRxTcnBpduCount
OID (numeric): 1.3.6.1.4.1.45.5.4.1.2.2.1.12
Node type: OBJECT-TYPE
Type: Counter32
Access: read-only
Description: The number of TCN BPDUs that have been received on this Port.
What is nnRstDot1wPortRxTcnBpduCount?
Counts legacy Topology Change Notification BPDUs received on this port, which an admin watches for a spike that would indicate frequent topology churn originating from a neighbor still running classic STP.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.45.5.4.1.2.2.1.12 snmpwalk -v2c -c public <target> NORTEL-NETWORKS-RAPID-SPANNING-TREE-MIB::nnRstDot1wPortRxTcnBpduCount
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.45.5.4.1.2.2.1.12.1 snmpget -v2c -c public <target> NORTEL-NETWORKS-RAPID-SPANNING-TREE-MIB::nnRstDot1wPortRxTcnBpduCount.1
Start monitoring Nortel Networks (later Avaya) enterprise switch (RSTP) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the NORTEL-NETWORKS-RAPID-SPANNING-TREE-MIB::nnRstDot1wPortRxTcnBpduCount OID value, configure state conditions and alerts, and monitor any Nortel Networks (later Avaya) enterprise switch (RSTP) from a single console.
OID Breakdown
Upper-level ancestors (8 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.4 | private | AirPair-MIB |
| 1.3.6.1.4.1 | enterprises | AirPair-MIB |
| 1.3.6.1.4.1.45 | synoptics | CMU-MIB |
| 1.3.6.1.4.1.45.5 | bayStackMibs | SYNOPTICS-ROOT-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.45.5.4 | nnRapidSpanningTreeMib | NORTEL-NETWORKS-RAPID-SPANNING-TREE-MIB |
| 1.3.6.1.4.1.45.5.4.1 | nnRstObjects | NORTEL-NETWORKS-RAPID-SPANNING-TREE-MIB |
| 1.3.6.1.4.1.45.5.4.1.2 | nnRstDot1w | NORTEL-NETWORKS-RAPID-SPANNING-TREE-MIB |
| 1.3.6.1.4.1.45.5.4.1.2.2 | nnRstDot1wPortTable | NORTEL-NETWORKS-RAPID-SPANNING-TREE-MIB |
| 1.3.6.1.4.1.45.5.4.1.2.2.1 | nnRstDot1wPortEntry | NORTEL-NETWORKS-RAPID-SPANNING-TREE-MIB |
| 1.3.6.1.4.1.45.5.4.1.2.2.1.12 | nnRstDot1wPortRxTcnBpduCount | NORTEL-NETWORKS-RAPID-SPANNING-TREE-MIB |