Cisco ISA500 Series Administration Manual page 165

Wireless Configuration for ISA550W and ISA570W
Configuring the Radio Settings
STEP 3
Cisco ISA500 Series Integrated Security Appliance Administrator Guide
• Bandwidth Channel: Choose 20 MHz or choose Auto to let the system
determine the optical bandwidth channel to use. This setting is specific to
802.11n traffic.
• Extension Channel: If you choose Auto as the bandwidth channel, choose
either Lower or Upper.
• U-APSD: Click Enable to enable the Unscheduled Automatic Power Save
Delivery (U-APSD) feature to conserve the power, or click Disable to disable
it.
• SSID Isolation: Click Enable to enable the SSID Isolation feature so that
SSIDs will not be able to see each other when SSIDs belong to the same
VLAN, or click Disable to disable it. When you enable the SSID Isolation
(among SSIDs), traffic on one SSID will not be forwarded to any other SSIDs.
In the SSID Table area, the SSID table lists four predefined SSIDs on your security
appliance. If needed, you can perform the following tasks:
• Enable: Check the box to enable the SSID, uncheck the box to disable the
SSID. By default, all four SSID are enabled.
• SSID Name: Enter an unique identifier for the SSID.
• SSID Broadcast: Check this box to broadcast the SSID in its beacon frames.
All wireless devices within range are able to see the SSID when they scan
for available networks. Uncheck this box to prevent auto-detection of the
SSID. In this case, users must know the SSID to set up a wireless connection
to this SSID. By default, SSID Broadcast is enabled for each SSID.
Disabling the SSID Broadcast is sufficient to prevent clients from
NOTE
accidentally connecting to your network, but it will not prevent even
the simplest of attempts by a hacker to connect or monitor
unencrypted traffic. Suppressing the SSID broadcast offers a very
minimal level of protection on an otherwise exposed network (such as
a guest network) where the priority is making it easy for clients to get
a connection and where no sensitive information is available.
• WMM: Check this box to enable the Wi-Fi Multimedia (WMM) QoS feature for
the SSID. WMM refers to QoS over Wi-Fi. QoS enables Wi-Fi SSIDs to
prioritize traffic and optimizes the way shared network resources are
allocated among different applications.
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