Wireless Configuration for the SA 520W
Configuring the Radio
Cisco SA 500 Series Security Appliances Administration Guide
119
4
•
Current Channel:
This field displays the channel currently in use by the
radio.
•
Channel:
Select a channel from the list of channels or choose “auto” to let
system determine the best channel to use based on the environmental noise
levels for the available channels.
•
Default Transmit Power:
Enter a value in dBm as the default transmitted
power level for all APs that use this radio. The default is 20 dBm.
STEP 3
Click
Apply
to save your settings, or click
Reset
to revert to the saved settings.
Advanced Radio Configuration
This page is used to specify advanced configuration settings for the radio.
STEP 1
Click
Wireless
on the menu bar, and then click
Radio Settings > Advanced
Settings
in the navigation tree.
The Advanced Radio Settings page appears.
STEP 2
Enter the following information:
•
Beacon Interval:
Beacon frames are transmitted by an access point at
regular intervals to announce the existence of the wireless network. Set the
interval by entering a value in milliseconds. The default setting is 100, which
means that beacon frames are sent every 100 milliseconds (10 seconds).
•
Dtim Interval:
The Delivery Traffic Information Map (DTIM) message is an
element that is included in some beacon frames. It indicates the client
stations that are currently sleeping in low-power mode and have buffered
data on the access point awaiting pickup. Set the interval by entering a value
in beacon frames. The default setting is 2, which means that the DTIM
message is included in every second beacon frame.
•
RTS Threshold:
The RTS threshold determines the packet size that requires
a Request To Send (RTS)/Clear To Send (CTS) handshake before sending. A
low threshold setting can be useful in areas where many client devices are
associating with the wireless device, or in areas where the clients are far
apart and can detect only the access point but not other clients. Although a
low threshold value consumes more bandwidth and reduces the throughput
of the packet, frequent RTS packets can help the network to recover from
interference or collisions. Set the threshold by entering the packet size in
bytes. The default value is 2346, which effectively disables RTS.
