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 :
.220.127.116.11.2.1.17 - To check the VLAN implementation we are checking BRIDGE.MIB oid.
For Cisco devices:
For Non Cisco devices:
Tables used :
Not supported : Device doesn't have SNMP credentials. Also as of now SNMP v3 is not supported.
Possible reasons for failed VLAN discovery :
VLANs help admins to restrict a few users by created sorted workstations. VLAN Monitoring tools raise timely alerts helping you fix issues quickly before they affect the end user. The VLAN discovery tool identifies new VLAN monitor and helps you perform effective VLAN monitoring.
In case of issue in VLAN discovery, below details are required for analysis: