Информационное Руководство для Cisco Cisco Aironet 350 Wireless LAN Client Adapter

A. It is normal that a client adapter has problems re−authenticating to the AP once it comes
back from sleep mode. The AP has an inactivity timeout. Therefore, when an adapter goes in
to sleep mode the AP de−authenticates the client. When the client resumes the session, it
keeps the status of authenticated. Because of this, it does not re−send the probe request in
order to start the whole process over again. This is why if they boot or restart the
authentication process, the client is able to authenticate.

A. The 

Packet to client xxxx reached max retries, removing the

client

 error message means that the AP disassociates the client because the client did not

respond to max keep−alive messages sent by the AP. This can be an indication of a bad RF.
Configure this command on the AP in order to eliminate this issue and to enable the client to
not lose the connection:

The increase of packet re−tries to 128 with the drop−packet option is a workaround for the
bad RF problem. Refer to Configuring the Maximum Data Retries for more information on
this command.

A. Yes. This can be achieved by using the Cisco Building Broadband Service Manager
(BBSM) with RADIUS server.

Cisco BBSM provides public and guest Internet access management features and
functionality to wired and wireless networks. It works with Cisco access−layer LAN products
like access layer switches. Refer to Cisco BBSM documentation for more information.

BBSM performs RADIUS authentication and authorization of end users (of a specific
VLAN). Each time the end user attempts to connect to the Internet, BBSM prompts for a
username and password. The values entered are used in the Access−Request packet to the
RADIUS authentication server. Upon successful authentication, the RADIUS server sends a
vendor−specific attribute that contains a bandwidth kbps value in the Access−Accept packet.

When the RADIUS server sends this vendor−specific attribute that contains a bandwidth kbps
value, BBSM throttles the bandwidth of the end user session to the kbps value specified. In
order to use this feature, administrators need to configure their RADIUS server to send the
vendor−specific attribute to transmit a Vendor ID of 5263, a Vendor type of 1, and the integer
value of the bandwidth kbps desired for the user account.

Refer to Cisco BBSM − Using RADIUS Authentication, Authorization, and Accounting for
more information on how BBSM works with a RADIUS server for user authentication and
bandwidth management.

Refer to Cisco BBSM Bandwidth Management on how to control a users bandwidth in
BBSM.

Also, refer to Configuring Cisco 2900XL/3500XL Switches with VLANs to Use Cisco
BBSM 5.0 for detailed information on how to configure the upstream switches of a client