Node is not displayed in Web Console
====================================

Symptom
-------

Case 1: None of the nodes except the Network Sensor are visible in the network
subnet where the Network Sensor is installed.

Case 2: Only some nodes are visible while other active nodes are not detected.

Cause
-----

Genian NAC can not scan nodes when the switch port configuration is mismatched
with the Sensor interface settings.

Additionally, remote device/node discovery can be impacted when Radius
Accounting, endpoint agent, or external API are not functioning properly. 

Resolution
----------

Switch
''''''

- Ensure that the port Genian NAC is on is properly configured to access the VLAN(s) you wish to monitor. 

 - Only Standard access ports (untagged) and 802.1Q Trunk (tagged) ports are supported by Genian NAC. 

Network Sensor
''''''''''''''

- Check the interface settings by accessing the command line and using the command ``show interface eth[#]``

 - Be aware that interface eth0 can only function when attached to an access port or in the presence of a native VLAN on a trunk port.
 - All tagged VLAN traffic can only be seen by a defined sub interface on that VLAN. For configuration, see: :doc:`/system/adding-deleting-network-sensors`    

- Try to ping resources on the subnet from the network sensor to ensure a communication path exists. 

**If using a Virtualized Sensor**

- Ensure your hypervisor is properly configured to interface with the network and your switches. Hypervisors frequently require non-standard configurations to communicate across a LAN, or to accept traffic from a trunked interface. 

 - Refer to: :doc:`/install/installing-genian-nac` , under "**Prepare Network Connection**."

Endpoint Agent
''''''''''''''

- Without the presence of a Sensor, the agent may be used to register nodes.

See:

- :doc:`/install/windows-agent`
- :doc:`/install/macos-agent`

RADIUS
''''''

- Without the presence of a Sensor, RADIUS Access-Request packets may be used
  to register nodes.

See RADIUS Section:

- :doc:`/authentication/enabling-authentication/8021x`

API
'''

- Without the presence of a Sensor, REST API may be used to register nodes.

See:

- :doc:`/api`