All MIBs › FOUNDRY-SN-SWITCH-GROUP-MIB › snVLanByPortStpTopChanges
snVLanByPortStpTopChanges
Module: FOUNDRY-SN-SWITCH-GROUP-MIB
OID (symbolic): FOUNDRY-SN-SWITCH-GROUP-MIB::snVLanByPortStpTopChanges
OID (numeric): 1.3.6.1.4.1.1991.1.1.3.2.1.1.20
Node type: OBJECT-TYPE
Type: Counter32
Access: read-only
Description: The total number of topology changes detected by this bridge since the management entity was last reset or initialized.
What is snVLanByPortStpTopChanges?
This read-only counter tracks the total number of Spanning Tree Protocol (STP) topology changes detected by the bridge since the management system was last reset or started. It records each time the bridge recalculates the spanning tree following a link failure or recovery. Network administrators monitor this counter to assess network stability and identify recurring topology instability.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.1991.1.1.3.2.1.1.20 snmpwalk -v2c -c public <target> FOUNDRY-SN-SWITCH-GROUP-MIB::snVLanByPortStpTopChanges
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.1991.1.1.3.2.1.1.20.1 snmpget -v2c -c public <target> FOUNDRY-SN-SWITCH-GROUP-MIB::snVLanByPortStpTopChanges.1
Start monitoring Brocade/Foundry FastIron/BigIron Ethernet switch (VLAN/FDB/STP) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the FOUNDRY-SN-SWITCH-GROUP-MIB::snVLanByPortStpTopChanges OID value, configure state conditions and alerts, and monitor any Brocade/Foundry FastIron/BigIron Ethernet switch (VLAN/FDB/STP) from a single console.
OID Breakdown
Upper-level ancestors (10 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 |
| 1.3.6.1.4.1.1991 | foundry | FOUNDRY-SN-ROOT-MIB |
| 1.3.6.1.4.1.1991.1 | products | FOUNDRY-SN-ROOT-MIB |
| 1.3.6.1.4.1.1991.1.1 | switch | FOUNDRY-SN-ROOT-MIB |
| 1.3.6.1.4.1.1991.1.1.3 | snSwitch | FOUNDRY-SN-ROOT-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.1991.1.1.3.2 | snVLanInfo | FOUNDRY-SN-SWITCH-GROUP-MIB |
| 1.3.6.1.4.1.1991.1.1.3.2.1 | snVLanByPortTable | FOUNDRY-SN-SWITCH-GROUP-MIB |
| 1.3.6.1.4.1.1991.1.1.3.2.1.1 | snVLanByPortEntry | FOUNDRY-SN-SWITCH-GROUP-MIB |
| 1.3.6.1.4.1.1991.1.1.3.2.1.1.20 | snVLanByPortStpTopChanges | FOUNDRY-SN-SWITCH-GROUP-MIB |