Extreme Networks Altitude 4000 Series, Справочное руководство, Страница: 288 / 521

Chapter 7: Wireless Configuration
Altitude
TM
4000 Series Access Point System Reference Guide
288
9 Select OK to update the Smart RF Channel and Power settings for this policy. Select Reset to revert to
the last saved configuration. The Smart RF policy can be invoked at any point in the configuration
process by selecting Activate SMART RF Policy from the upper, left-hand side, portion of the access
point user interface.
10 Select Scanning Configuration. Ensure Activate SMART RF Policy remains selected so the screen’s
parameters can be updated.
5.0 Channel Width 20 and 40 MHz channel widths are supported by the 802.11a radio. 20/
40 MHz operation (the default setting for the 5 GHz radio) allows the
access point to receive packets from clients using 20 MHz of bandwidth
while transmitting a packet using 40 MHz bandwidth. This mode is
supported for 11n users on both the 2.4 and 5 GHz radios. If an 11n
user selects two channels (a Primary and Secondary channel), the
system is configured for dynamic 20/40 operation. When 20/40 is
selected, clients can take advantage of “wider channels.” 802.11n clients
experience improved throughput using 40 MHz while legacy clients
(either 802.11a or
802.11b/g depending on the radio selected) can still be serviced without
interruption using 20 MHz. Select
Automatic to enable the automatic
assignment of channels to working radios to avoid channel overlap and
avoid interference from external RF sources. 40MHz is the default
setting.
2.4 GHz Channels Use the Select drop-down menu to select the 2.4 GHz channels used in
Smart RF scans.
2.4 GHz Channel
Width 20 and 40 MHz channel widths are supported by the 802.11a radio. 20
MHz is the default setting for 2.4 GHz radios. 20/40 MHz operation (the
default setting for the 5 GHz radio) allows the Access Point to receive
packets from clients using 20 MHz of bandwidth while transmitting a
packet using 40 MHz bandwidth. This mode is supported for 11n users
on both the 2.4 and 5 GHz radios. If an 11n user selects two channels (a
Primary and Secondary channel), the system is configured for dynamic
20/40 operation. When 20/40 is selected, clients can take advantage of
“wider channels.” 802.11n clients experience improved throughput using
40 MHz while legacy clients (either 802.11a or 802.11b/g depending on
the radio selected) can still be serviced without interruption using 20
MHz. Select
Automatic to enable automatic assignment of channels to
working radios to avoid channel overlap and avoid interference from
external RF sources. 20MHz is the default setting.