User's Manual

Chapter 12: Virtual Access Point (VAP) Configuration
TR0153 Rev. E1 97
CLI
The example below shows how to set the preamble type used by a VAP using the CLI. The
preamble type is set with the ‘iwpriv.short_preamble’ parameter in the ‘wlanN’ interfaces. To
enable short preambles, set this parameter to ‘1’. To force use of long preambles, set this
parameter to ‘0’.
> use wlan1
wlan1> set iwpriv.short_preamble=1
Web GUI
The preamble types supported by the VAPs can be set via the web interface using the
appropriate “wlanN” tab on the “Wireless Interfaces” page (see Figure 42). To allow support for
short preambles, set the “Use Short Preamble” drop-down menu to “Yes”. To limit preambles
to long ones, set the drop-down menu to “No”.
12.13 Beacon Interval
The APs’ beacon intervals are configurable. The beacon interval must fall in the range from 20
to 500 ms. The beacon interval is set to 100 ms by default.
CLI
The example below shows how to set the beacon interval for a VAP using the CLI. The beacon
interval is set with the ‘iwpriv.beacon_interval’ parameter in the ‘wlanN’ interfaces and is
specified in milliseconds.
> use wlan1
wlan1> set iwpriv.beacon_interval=100
Web GUI
The beacon interval for an AP can be set via the web interface using the appropriate “wlanN”
tab on the “Wireless Interfaces” page (see Figure 42). Enter a value specified in milliseconds in
the “Beacon Interval” field.
12.14 Maximum Link Distance
The 802.11 standard defines delay values in the communication between devices that affect
the maximum communication distance that can be supported. By default, the communication
distance is limited to approximately 4 km (2.5 mi). The maximum communication distance can