Radius Packet Format - HP 1910 User Manual

6. The user accesses the network resources.
7. The host requests the RADIUS client to tear down the connection and the RADIUS client sends a
stop-accounting request (Accounting-Request) to the RADIUS server.
8. The RADIUS server returns an acknowledgement (Accounting-Response) and stops accounting for
the user.

RADIUS packet format

RADIUS uses UDP to transmit messages. To ensure smooth message exchange between the RADIUS
server and the client, RADIUS uses a series of mechanisms, including the timer management mechanism,
the retransmission mechanism, and the backup server mechanism.
format.
Figure 415 RADIUS packet format
0
Code
Descriptions of the fields are as follows:
The Code field (1 byte long) indicates the type of the RADIUS packet.
•
Table 116 Main values of the Code field
Code Packet type
1 Access-Request
2 Access-Accept
3 Access-Reject
4 Accounting-Request
Accounting-Respons
5
e
7 15
Identifier
Authenticator
Attributes
Description
From the client to the server. A packet of this type carries user information
for the server to authenticate the user. It must contain the User-Name
attribute and can optionally contain the attributes of NAS-IP-Address,
User-Password, and NAS-Port.
From the server to the client. If all the attribute values carried in the
Access-Request are acceptable, the authentication succeeds, and the
server sends an Access-Accept response.
From the server to the client. If any attribute value carried in the
Access-Request is unacceptable, the authentication fails, and the server
sends an Access-Reject response.
From the client to the server. A packet of this type carries user information
for the server to start or stop accounting for the user. The Acct-Status-Type
attribute in the packet indicates whether to start or stop accounting.
From the server to the client. The server sends a packet of this type to
notify the client that it has received the Accounting-Request and has
successfully recorded the accounting information.
Figure 415
7
Length
430
shows the RADIUS packet
31