H3C Technologies H3C S3100 Series Switches - Manual (Page 431)

2-17
z In an actual network environment, you can specify one server as both the primary and secondary
accounting servers, as well as specifying two RADIUS servers as the primary and secondary
accounting servers respectively. In addition, because RADIUS adopts different UDP ports to
exchange authentication/authorization messages and accounting messages, you must set a port
number for accounting different from that set for authentication/authorization.
z With stop-accounting request buffering enabled, the switch first buffers the stop-accounting
request that gets no response from the RADIUS accounting server, and then retransmits the
request to the RADIUS accounting server until it gets a response, or the maximum number of
transmission attempts is reached (in this case, it discards the request).
z You can set the maximum allowed number of continuous real-time accounting failures. If the
number of continuously failed real-time accounting requests to the RADIUS server reaches the set
maximum number, the switch cuts down the user connection.
z The IP address and port number of the primary accounting server of the default RADIUS scheme
"system" are 127.0.0.1 and 1646 respectively.
z Currently, RADIUS does not support the accounting of FTP users.
Configuring Shared Keys for RADIUS Messages
Both RADIUS client and server adopt MD5 algorithm to encrypt RADIUS messages before they are
exchanged between the two parties. The two parties verify the validity of the RADIUS messages
received from each other by using the shared keys that have been set on them, and can accept and
respond to the messages only when both parties have the same shared key.
Table 2-15 Configure shared keys for RADIUS messages
Operation Command Remarks
Enter system view system-view —
Create a RADIUS scheme and
enter its view radius scheme
radius-scheme-name
Required
By default, a RADIUS scheme
named "system" has already
been created in the system.
Set a shared key for RADIUS
authentication/authorization
messages
key authentication string
Required
By default, no shared key is
created.
Set a shared key for RADIUS
accounting messages
key accounting string
Required
By default, no shared key is
created.