RADIUS Authentication and Accounting
Configuring RADIUS Accounting
■ Exec accounting: Provides records holding the information listed
below about login sessions (console, Telnet, and SSH) on the switch:
• Acct-Authentic
• Acct-Status-Type
• NAS-Identifier
• Acct-Delay-Time
• Acct-Terminate-Cause
• NAS-IP-Address
• Acct-Session-Id
• Calling-Station-Id
• Service-Type
• Acct-Session-Time
• MS-RAS-Vendor
• Username
■ System accounting: Provides records containing the information
listed below when system events occur on the switch, including
system reset, system boot, and enabling or disabling of system
accounting.
• Acct-Authentic
• Acct-Terminate-Cause
• NAS-IP-Address
• Acct-Delay-Time
• Calling-Station-Id
• Service-Type
• Acct-Session-Id
• MS-RAS-Vendor
• Username
• Acct-Session-Time
• NAS-Identifier
■ Commands accounting: Provides records containing information
after the execution of a command.
■ RADIUS accounting with IP attribute: The RADIUS Attribute 8
(Framed-IP-Address) feature provides the RADIUS server with infor-
mation about the client’s IP address after the client is authenticated.
DHCP snooping is queried for the IP address of the client, so DHCP
snooping must be enabled for the VLAN of which the client is a
member.
When the switch begins communications with the RADIUS server it sends
the IP address of the client requesting access to the RADIUS server as
RADIUS Attribute 8 (Framed-IP-Address) in the RADIUS accounting
request. The RADIUS server can use this information to build a map of
usernames and addresses.
It may take a minute or longer for the switch to learn the IP address and
then send the accounting packet with the Framed-IP-Address attribute to
the RADIUS server. If the switch does not learn the IP address after a
minute, it sends the accounting request packet to the RADIUS server
without the Framed-IP-Address attribute. If the IP address is learned at a
later time, it will be included in the next accounting request packet sent.
The switch forwards the accounting information it collects to the designated
RADIUS server, where the information is formatted, stored, and managed by
the server. For more information on this aspect of RADIUS accounting, refer
to the documentation provided with your RADIUS server.
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