H3C Technologies H3C S7500E Series Switches - Manual (Page 18)

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mechanism, retransmission mechanism, and slave server mechanism. Figure 1-4 shows the RADIUS
packet format.
Figure 1-4 RADIUS packet format
Descriptions of the fields are as follows:
1) The Code field (1-byte long) is for indicating the type of the RADIUS packet. Table 1-1 gives the
possible values and their meanings.
Table 1-1 Main values of the Code field
Code Packet type Description
1 Access-Request
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.
2 Access-Accept
From the server to the client. If all the attribute values carried in
the Access-Request are acceptable, that is, the authentication
succeeds, the server sends an Access-Accept response.
3 Access-Reject
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.
4 Accounting-Request
From the client to the server. A packet of this type carries user
information for the server to start/stop accounting for the user. It
contains the Acct-Status-Type attribute, which indicates
whether the server is requested to start the accounting or to end
the accounting.
5 Accounting-Response
From the server to the client. The server sends to the client a
packet of this type to notify that it has received the
Accounting-Request and has correctly started recording the
accounting information.