HP ProCurve Management And Configuration Manual page 600

Troubleshooting
Unusual Network Activity
Figure C-5. Authenticator Ports Remain "Open" Until Activated
C-16
RADIUS server fails to respond to a request for service, even though
the server's IP address is correctly configured in the switch. Use
show radius to verify that the encryption key (RADIUS secret key) the switch
is using is correct for the server being contacted. If the switch has only a global
key configured, then it either must match the server key or you must configure
a server-specific key. If the switch already has a server-specific key assigned
to the server's IP address, then it overrides the global key and must match the
server key.
Figure C-6. Displaying Encryption Keys
Port A9 shows an "Open" status even
though Access Control is set to
Unauthorized (Force Auth). This is
because the port-access
authenticator has not yet been
activated.
Global RADIUS Encryption Key
Unique RADIUS Encryption Key
for the RADIUS server at
10.33.18.119