Cisco Catalyst 3560-X Software Configuration Manual page 255

Chapter 1 Configuring Switch-Based Authentication
CoA ACK Response Code
If the authorization state is changed successfully, a positive acknowledgement (ACK) is sent. The
attributes returned within CoA ACK will vary based on the CoA Request and are discussed in individual
CoA Commands.
CoA NAK Response Code
A negative acknowledgement (NAK) indicates a failure to change the authorization state and can include
attributes that indicate the reason for the failure. Use show commands to verify a successful CoA.
CoA Request Commands
This section includes:
•
•
•
•
•
•
Beginning with Cisco IOS Release 12.2(52)SE, the switch supports the commands shown in
Table 1-4
Command
Reauthenticate host
Terminate session
Bounce host port
Disable host port
1. All CoA commands must include the session identifier between the switch and the CoA client.
Session Reauthentication
The AAA server typically generates a session reauthentication request when a host with an unknown
identity or posture joins the network and is associated with a restricted access authorization profile (such
as a guest VLAN). A reauthentication request allows the host to be placed in the appropriate
authorization group when its credentials are known.
To initiate session authentication, the AAA server sends a standard CoA-Request message which
contains a Cisco vendor-specific attribute (VSA) in this form:
Cisco:Avpair="subscriber:command=reauthenticate" and one or more session identification attributes.
The current session state determines the switch response to the message. If the session is currently
authenticated by IEEE 802.1x, the switch responds by sending an EAPoL
(see footnote
1. Extensible Authentication Protocol over Lan
OL-25303-03
Session Reauthentication
Session Reauthentication in a Switch Stack
Session Termination
CoA Disconnect-Request
CoA Request: Disable Host Port
CoA Request: Bounce-Port
CoA Commands Supported on the Switch
1
Cisco VSA
Cisco:Avpair="subscriber:command=reauthenticate"
This is a standard disconnect request that does not require a VSA.
Cisco:Avpair="subscriber:command=bounce-host-port"
Cisco:Avpair="subscriber:command=disable-host-port"
1 below) to the server.
Catalyst 3750-X and 3560-X Switch Software Configuration Guide
Controlling Switch Access with RADIUS
Table
1
-RequestId message
1-4.
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