All MIBs › SW-COMMON-MIB › swL2DevAlarmTopChange
swL2DevAlarmTopChange
Module: SW-COMMON-MIB
OID (symbolic): SW-COMMON-MIB::swL2DevAlarmTopChange
OID (numeric): 1.3.6.1.4.1.326.2.20.1.2.2.2.28.2.1.2.3
Node type: OBJECT-TYPE
Type: INTEGER
Access: read-write
Description: This object determines to send a trap or not when the switch topology was changed. If the object is enabled(3), the topologyChange trap is sent by the device when any of its configured ports transitions from the Learning state to the Forwarding state, or from the Forwarding state to the Blocking state. For the same port tranition, the device doesn't send the trap if this object value is disabled or other.
What is swL2DevAlarmTopChange?
This object controls whether the switch sends a topology-change trap whenever one of its ports transitions between Spanning Tree states, from Learning to Forwarding or from Forwarding to Blocking. Admins enable it to get near-real-time visibility into STP topology churn, which often indicates flapping links or cabling problems. With the value enabled(3), a port flapping between forwarding and blocking during a bad cable event generates a stream of topology-change traps for the NMS to flag.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.326.2.20.1.2.2.2.28.2.1.2.3 snmpwalk -v2c -c public <target> SW-COMMON-MIB::swL2DevAlarmTopChange
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.326.2.20.1.2.2.2.28.2.1.2.3.1 snmpget -v2c -c public <target> SW-COMMON-MIB::swL2DevAlarmTopChange.1
Set instance 1 (SNMPv2c):
snmpset -v2c -c private <target> 1.3.6.1.4.1.326.2.20.1.2.2.2.28.2.1.2.3.1 i <value>
Start monitoring D-Link ES2000 'Golf' series switch (Marconi-branded OEM, shared object definitions) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the SW-COMMON-MIB::swL2DevAlarmTopChange OID value, configure state conditions and alerts, and monitor any D-Link ES2000 'Golf' series switch (Marconi-branded OEM, shared object definitions) from a single console.
OID Breakdown
Upper-level ancestors (13 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 |
| 1.3.6.1.4.1.326 | fore | COMMON-GOLF-MIB |
| 1.3.6.1.4.1.326.2 | systems | COMMON-GOLF-MIB |
| 1.3.6.1.4.1.326.2.20 | ethernet | COMMON-GOLF-MIB |
| 1.3.6.1.4.1.326.2.20.1 | edge | COMMON-GOLF-MIB |
| 1.3.6.1.4.1.326.2.20.1.2 | golf | COMMON-GOLF-MIB |
| 1.3.6.1.4.1.326.2.20.1.2.2 | golfcommon | COMMON-GOLF-MIB |
| 1.3.6.1.4.1.326.2.20.1.2.2.2 | fore_mgmt | COMMON-GOLF-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.326.2.20.1.2.2.2.28 | es2000Mgmt | SW-COMMON-MIB |
| 1.3.6.1.4.1.326.2.20.1.2.2.2.28.2 | swL2Mgmt | SW-COMMON-MIB |
| 1.3.6.1.4.1.326.2.20.1.2.2.2.28.2.1 | swL2DevMgmt | SW-COMMON-MIB |
| 1.3.6.1.4.1.326.2.20.1.2.2.2.28.2.1.2 | swL2DevAlarm | SW-COMMON-MIB |
| 1.3.6.1.4.1.326.2.20.1.2.2.2.28.2.1.2.3 | swL2DevAlarmTopChange | SW-COMMON-MIB |