Ieee 802.1X Accounting; Ieee 802.1X Accounting Attribute-Value Pairs - Cisco IE 3000 Software Configuration Manual

Understanding IEEE 802.1x Port-Based Authentication
In multiple-hosts mode, you can attach multiple hosts to a single IEEE 802.1x-enabled port.
on page 10-8
of the attached clients must be authorized for all clients to be granted network access. If the port becomes
unauthorized (re-authentication fails or an EAPOL-logoff message is received), the switch denies
network access to all of the attached clients. In this topology, the wireless access point is responsible for
authenticating the clients attached to it, and it also acts as a client to the switch.
With the multiple-hosts mode enabled, you can use IEEE 802.1x authentication to authenticate the port
and port security to manage network access for all MAC addresses, including that of the client.
Figure 10-5
Wireless clients

IEEE 802.1x Accounting

The IEEE 802.1x standard defines how users are authorized and authenticated for network access but
does not keep track of network usage. IEEE 802.1x accounting is disabled by default. You can enable
IEEE 802.1x accounting to monitor this activity on IEEE 802.1x-enabled ports:
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The switch does not log IEEE 802.1x accounting information. Instead, it sends this information to the
RADIUS server, which must be configured to log accounting messages.

IEEE 802.1x Accounting Attribute-Value Pairs

The information sent to the RADIUS server is represented in the form of Attribute-Value (AV) pairs.
These AV pairs provide data for different applications. (For example, a billing application might require
information that is in the Acct-Input-Octets or the Acct-Output-Octets attributes of a RADIUS packet.)
AV pairs are automatically sent by a switch that is configured for IEEE 802.1x accounting. Three types
of RADIUS accounting packets are sent by a switch:
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Cisco IE 3000 Switch Software Configuration Guide
10-8
shows IEEE 802.1x port-based authentication in a wireless LAN. In this mode, only one
Multiple Host Mode Example
Access point
User successfully authenticates.
User logs off.
Link-down occurs.
Re-authentication successfully occurs.
Re-authentication fails.
START–sent when a new user session starts
INTERIM–sent during an existing session for updates
STOP–sent when a session terminates
Chapter 10 Configuring IEEE 802.1x Port-Based Authentication
Authentication
server
(RADIUS)
Figure 10-5
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