User's Manual

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Cisco 3200 Series Wireless MIC Software Configuration Guide
OL-7734-02
Chapter 4 Configuring Radio Settings
Enabling and Disabling Public Secure Packet Forwarding
a radio link to the access point, the access point must reduce the delivery reliability of multicast packets
to workgroup bridges. With reduced reliability, the access point cannot confirm whether multicast
packets reach the intended workgroup bridge, so workgroup bridges at the edge of the access point's
coverage area might lose IP connectivity. When you treat workgroup bridges as client devices, you
increase performance but reduce reliability.
Note This feature is best suited for use with stationary workgroup bridges. Mobile workgroup bridges might
encounter spots in the access point's coverage area where they do not receive multicast packets and lose
communication with the access point even though they are still associated to it.
A Cisco Workgroup Bridge provides a wireless LAN connection for up to eight Ethernet-enabled
devices.
Beginning in privileged EXEC mode, follow these steps to configure the encapsulation transformation
method:
Use the no form of the command to disable reliable multicast messages to workgroup bridges.
Enabling and Disabling Public Secure Packet Forwarding
Public Secure Packet Forwarding (PSPF) prevents client devices associated to an access point from
inadvertently sharing files or communicating with other client devices associated to the access point. It
provides Internet access to client devices without providing other capabilities of a LAN. This feature is
useful for public wireless networks like those installed in airports or on college campuses.
Note To prevent communication between clients associated to different access points, you must set up
protected ports on the switch to which your access points are connected. See the Configuring Protected
Ports, page 4-16 for instructions on setting up protected ports.
To enable and disable PSPF using CLI commands on your access point, you use bridge groups. You can
find a detailed explanation of bridge groups and instructions for implementing them in this document:
• Cisco IOS Bridging and IBM Networking Configuration Guide, Release 12.2. Click this link to
browse to the Configuring Transparent Bridging chapter:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fibm_c/bcfpart1/bcftb.
htm
You can also enable and disable PSPF using the web-browser interface. The PSPF setting is on the Radio
Settings pages.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface dot11radio 0 Enter interface configuration mode for the radio interface.
Step 3
infrastructure-client Enable reliable multicast messages to workgroup bridges.
Step 4
end Return to privileged EXEC mode.
Step 5
copy running-config startup-config (Optional) Save your entries in the configuration file.