This message gets logged when the physical link the client was authenticated on went down.
This is an informational message.
Info
Network Login user %user% cleared due to link down event, Mac %mac% port %port% VLAN(s) \"%vlan%\"
| Name | Type | 
|---|---|
| user | String | 
| mac | MAC | 
| port | SlotPort | 
| vlan | VLAN |