3Com 5500-SI Configuration Manual page 293

Length: Two bytes, identifying the total length of the accounting packet.
■
Authenticator: 16 bytes, identifying the information between the RADIUS server
■
and client.
The Attributes field contains multiple sub-fields. The content of the Attributes field is
slightly different between an Accounting START packet and an Accounting STOP
packet, as described in the following text.
Structure of the Attributes field of an Accounting START packet
Acct session ID: Session ID used to match Accounting START packets with
■
Accounting STOP packets. The Accounting START and Accounting STOP packets in
the same group must have the same Acct session ID. This sub-field uniquely
identifies a session.
Framed IP address: IP address already assigned to the DHCP client by the DHCP
■
server.
Calling Station ID: MAC address of the DHCP client.
■
Acct Authentic: Indicates whether or not the DHCP client needs to be
■
authenticated and the authentication method. As DHCP clients are not
authenticated, the value of this sub-field is 0, which means undefined.
Acct Status Type: Accounting status type. The value of this sub-field is 1, which
■
means to start account.
Service Type: Type of the service the user applies for.
■
NAS IP Address: IP address of the network access server (NAS).
■
Acct Delay Time: Time delay (in seconds) in sending accounting packets.
■
Structure of the Attributes field of an Accounting STOP packet
Acct session ID: Session ID used to match Accounting START packets with
■
Accounting STOP packets. The Accounting START and Accounting STOP packets in
the same group must have the same Acct session ID. This sub-field uniquely
identifies a session.
Framed IP address: IP address already assigned to the DHCP client by the DHCP
■
server.
Calling Station ID: MAC address of the DHCP client.
■
Acct Authentic: Indicates whether or not the DHCP client needs to be
■
authenticated and the authentication method. As DHCP clients are not
authenticated, the value of this sub-field is 0, which means undefined.
Acct Session Time: Lease time (in seconds) of the IP address assigned to the DHCP
■
client.
Acct Terminate Cause: Cause of reclaiming the IP address from the DHCP client.
■
The value of this sub-field is 5, which means session timeout.
Acct Status Type: Accounting status type. The value of this sub-field is 2, which
■
means to stop accounting.
Service Type: Type of the service the user applies for.
■
NAS IP Address: IP address of the NAS.
■
Acct Delay Time: Time delay (in seconds) in sending accounting packets.
■
Introduction to DHCP Accounting 293