All MIBs › SW-DES3x50-L2MGMT-MIB › swL2DevAlarmTopologyChange
swL2DevAlarmTopologyChange
Module: SW-DES3x50-L2MGMT-MIB
OID (symbolic): SW-DES3x50-L2MGMT-MIB::swL2DevAlarmTopologyChange
OID (numeric): 1.3.6.1.4.1.171.11.2.1.3.2
Node type: OBJECT-TYPE
Type: INTEGER
Access: read-write
Description: This object determine 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 swL2DevAlarmTopologyChange?
Controls whether the switch sends a topologyChange trap whenever one of its ports transitions between STP states (Learning-to-Forwarding or Forwarding-to-Blocking); enabling(3) it gives an admin early warning of STP-driven topology churn, which can otherwise show up only as brief, unexplained connectivity blips.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.171.11.2.1.3.2 snmpwalk -v2c -c public <target> SW-DES3x50-L2MGMT-MIB::swL2DevAlarmTopologyChange
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.171.11.2.1.3.2.1 snmpget -v2c -c public <target> SW-DES3x50-L2MGMT-MIB::swL2DevAlarmTopologyChange.1
Set instance 1 (SNMPv2c):
snmpset -v2c -c private <target> 1.3.6.1.4.1.171.11.2.1.3.2.1 i <value>
Start monitoring D-Link DES-3x50 series managed Ethernet switch (Layer 2 VLAN/STP/MAC-table management root) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the SW-DES3x50-L2MGMT-MIB::swL2DevAlarmTopologyChange OID value, configure state conditions and alerts, and monitor any D-Link DES-3x50 series managed Ethernet switch (Layer 2 VLAN/STP/MAC-table management root) 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 |
| 1.3.6.1.4.1.171 | d_link | DE1500-MIB |
| 1.3.6.1.4.1.171.11 | dlink_mgmt | DES2218-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.171.11.2 | swL2MgmtMIB | SW-DES3x50-L2MGMT-MIB |
| 1.3.6.1.4.1.171.11.2.1 | swL2DevMgmt | SW-DES3x50-L2MGMT-MIB |
| 1.3.6.1.4.1.171.11.2.1.3 | swL2DevAlarm | SW-DES3x50-L2MGMT-MIB |
| 1.3.6.1.4.1.171.11.2.1.3.2 | swL2DevAlarmTopologyChange | SW-DES3x50-L2MGMT-MIB |