Cisco Systems OL-6415-04 manual Configuring Beacon Period and Dtim, Configuring Protected Ports

Chapter 2 Configuring Radio Settings

Configuring Beacon Period and DTIM

Use the no form of the command to disable PSPF.

Configuring Protected Ports

To prevent communication between client devices associated to different access points on your wireless LAN, you must set up protected ports on the switch to which the wireless devices are connected.

Beginning in privileged EXEC mode, follow these steps to define a port on your switch as a protected port:

	Command	Purpose
Step 1
	configure terminal	Enter global configuration mode.
Step 2
	interface interface-id	Enter interface configuration mode, and enter the type and
		number of the switchport interface to configure, such as
		gigabitethernet0/1.
Step 3
	switchport protected	Configure the interface to be a protected port.
Step 4
	end	Return to privileged EXEC mode.
Step 5
	show interfaces interface-id	Verify your entries.
	switchport
Step 6
	copy running-config startup-config	(Optional) Save your entries in the configuration file.

To disable protected port, use the no switchport protected interface configuration command.

For detailed information on protected ports and port blocking, see the “Configuring Port-Based Traffic Control” chapter in the Catalyst 3550 Multilayer Switch Software Configuration Guide, 12.1(12c)EA1 at: http://www.cisco.com/en/US/products/hw/switches/ps646/products_configuration_guide_book09186a 008011591c.html

Configuring Beacon Period and DTIM

The beacon period is the amount of time between access point beacons in kilo-microseconds. One kilo-microseconds equals 1,024 microseconds. The Data Beacon Rate, always a multiple of the beacon period, determines how often the beacon contains a delivery traffic indication message (DTIM). The DTIM tells power-save client devices that a packet is waiting for them.

For example, if the beacon period is set at 100, its default setting, and the data beacon rate is set at 2, its default setting, then the wireless device sends a beacon containing a DTIM every 200 kilo-microseconds. One kilo-microsecond equals 1,024 microseconds.

The default beacon period is 100, and the default DTIM is 2. Beginning in privileged EXEC mode, follow these steps to configure the beacon period and the DTIM:

		Command	Purpose
	Step 1
		configure terminal	Enter global configuration mode.
	Step 2
		interface dot11radio { 0 1 }	Enter interface configuration mode for the radio interface. The
			2.4-GHz radio is radio 0, and the 5-GHz radio is radio 1.
	Cisco Wireless ISR and HWIC Access Point Configuration Guide
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