Wireless (for ISA550W and ISA570W only)
Advanced Radio Settings
Cisco ISA500 Series Integrated Security Appliances Administration Guide
201
5
Advanced Radio Settings
Use the Advanced Settings page to specify the advanced radio settings.
NOTE
This page is available if the wireless radio is enabled on the Basic Settings page.
STEP 1
Click
Wireless > Advanced Settings
.
STEP 2
Enter the following information:
•
Guard Interval:
Choose either Long (800 ns) or Short (400 ns) that the
security appliance will retry a frame transmission that fails.
NOTE:
The short frame is only available when the specified wireless mode
includes 802.11n.
•
CTS Protection Mode:
CTS (Clear-To-Send) Protection Mode function
boosts the ability of the SSID to catch all Wireless-G transmissions but will
severely decrease performance.
-
Select the
AUTO
radio button
if you want the security appliance to
perform a CTS handshake before transmitting a packet. This mode can
minimize collisions among hidden stations.
-
Select the
Disabled
radio button if you want to permanently disable this
feature.
•
Power Output:
You can adjust the output power of the access point to get
the appropriate coverage for your wireless network. Choose the level that
you need for your environment. If you are not sure of which setting to select,
then use the default setting, 100%.
•
Beacon Interval:
Beacon frames are transmitted by the access point at
regular intervals to announce the existence of the wireless network. Set the
interval by entering a value in milliseconds. Enter a value from 20 to 999 ms.
The default value is 100 ms, which means that beacon frames are sent every
100 ms.
•
DTIM Interval:
The Delivery Traffic Information Map (DTIM) message is an
element that is included in some beacon frames. It indicates that the client
stations 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. Enter a value from 1 to 255. The default value is 1, which
means that the DTIM message is included in every second beacon frame.
