VLAN discovery in OpManager:
Go to Device Snapshot page > select a network device. Click on the menu icon present in the right corner for more actions > VLANs > Discover VLANs
Note: VLAN discovery can be done only in Switch and Router category devices.
VLAN enabled interfaces will be discovered only if the SNMP agent responds to the following OIDs:
List of OIDs used for VLAN discovery :
.1.3.6.1.2.1.17 - To check the VLAN implementation we are checking BRIDGE.MIB oid.
For Cisco devices:
- VLANIndex - .1.3.6.1.4.1.9.9.68.1.2.2.1.2
- VLANName - .1.3.6.1.4.1.9.9.46.1.3.1.1.4
- VLANStatus - .1.3.6.1.4.1.9.9.68.1.1.7.1.3
- VLANIndexVSIFIndex -.1.3.6.1.4.1.9.9.46.1.3.1.1.18
For Non Cisco devices:
- VLANIndex - .1.3.6.1.2.1.17.7.1.4.5.1.1
- VLANName - .1.3.6.1.2.1.17.7.1.4.3.1.1
- VLANStatus - .1.3.6.1.2.1.17.7.1.4.3.1.5
- PortIfIndex - .1.3.6.1.2.1.17.1.4.1.2
Tables used :
- ManagedObject
- VlanInfo
- VlanInfoMappingDetails
Not supported : Device doesn't have SNMP credentials. Also as of now SNMP v3 is not supported.
Possible reasons for failed VLAN discovery :
- Credential may not be passed.
- Device has been categorized as a non Router/Switch category
- Above mentioned oids failed to respond
- Bulk SNMP query disable in snmp agent
In case of issue in VLAN discovery, below details are required for analysis:
- Enable Debug prints under system settings.
- Disable SNMP logs if enabled.
- Shutdown OpManager. Clear logs folder. Start OpManager.
- Discover VLANs, wait for a while because VLAN discovery may be running in the background.
- Then stop OpManager and zip the logs and send to us.
- Mibbrowser output needed for the oids.
