D-Link DXS-1210-12TC Reference Manual page 83

Bad Authenticators
Pending Requests
Timeouts
Unknown Types
Packets Dropped
DXS-1210 Series Smart Managed Switch CLI Reference Guide
The number of RADIUS Response packets containing invalid
authenticators or Signature attributes received from this server.
The number of RADIUS Request packets destined for this server that
have not yet timed out or received a response. This variable is
incremented when a Request is sent and decremented due to receipt
of a Response, a timeout or retransmission.
The number of timeouts to this server. After a timeout the client may
retry to the same server, send to a different server, or give up. A retry
to the same server is counted as a retransmit as well as a timeout. A
send to a different server is counted as a Request as well as a timeout.
The number of RADIUS packets of unknown type which were received
from this server.
The number of RADIUS packets of which were received from this
server and dropped for some other reason.
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