All MIBs › RFC1286-MIB › topologyChange
topologyChange
Module: RFC1286-MIB
OID (symbolic): RFC1286-MIB::topologyChange
OID (numeric): 1.3.6.1.2.1.17.0.2
Node type: NOTIFICATION-TYPE
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.
Examples
Send this trap to an SNMP manager — replace <manager> with the IP or hostname of your monitoring server (SNMPv2c):
snmptrap -v2c -c public <manager> '' RFC1286-MIB::topologyChange snmptrap -v2c -c public <manager> '' 1.3.6.1.2.1.17.0.2
Listen for incoming traps on the manager host (-f keeps it in the foreground, -Lo prints to stdout — useful for testing):
snmptrapd -f -Lo -c /dev/null authCommunity log public
Example snmptrapd log entry:
zoo11-linux.zoo [UDP: [192.168.30.111]:55638->[192.168.30.10]:162]: DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (249196886) 28 days, 20:12:48.86 SNMPv2-MIB::snmpTrapOID.0 = OID: RFC1286-MIB::topologyChange
Start monitoring vendor-neutral, standards-based MIB, Ethernet/Token Ring transparent bridges and early Layer 2 switches with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the RFC1286-MIB::topologyChange OID value, configure state conditions and alerts, and monitor any vendor-neutral, standards-based MIB, Ethernet/Token Ring transparent bridges and early Layer 2 switches from a single console.
OID Breakdown
Upper-level ancestors (7 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 |
| 1.3.6.1.2 | mgmt | AXON-MIB |
| 1.3.6.1.2.1 | mib_2 | AXON-MIB |
| 1.3.6.1.2.1.17 | dot1dBridge | BRIDGE-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.2.1.17.0.2 | topologyChange | RFC1286-MIB |