Hello Marlon,
You can ping the NAC appliance, and it's responding to SNMP but you cannot SSH to it?
Are you able to get console access?
If so try the following commands:
See the status of the NAC:
nacctl status
Check disk space:
df -h
Attempt the following commands:
nacctl restart
Also, attempt to get to the NAC using the following URL:
https://:8443
try username: admin
password: Extreme@pp
or
password: Enterasysn@c
I would highly suggest creating a ticket with GTAC for this.
Thanks
-Ryan