Extreme Networks Altitude 4700 Series, Руководство по продукции

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Altitude 4700 Series Access Point Product Reference Guide
179
Set Rates Click the Set Rates button to define minimum and
maximum data transmit rates for the radio.
Use the Basic Rates drop-down menu to select the rates
available for either the 2.4 GHz or 5 GHz radio band. The
menu options differ, based on the radio band.
For 2.4 GHz, the following options are available:
• 1 and 2 Mbps
• 1, 2, 5.5 and 11 Mbps (default setting)
• 1, 2, 5.5, 11 and 6, 12, 24 Mbps
• 1, 2, 5.5, 11 and 6, 12, 24 Mbps and MCS 0-7
• 6, 12 and 24 Mbps
• 6, 12 and 24 Mbps and MCS 0-7
• MCS 0-7
For 5 Ghz, the following options are available:
• 6, 12 and 24 Mbps
• 6, 12 and 24 Mbps and MCS 0-7
• MCS 0-7
When a basic rate option is selected (from the drop-down
menu), the rates are automatically selected and grayed out
in the
Supported Rates radio boxes. Select remaining
rates as needed for additional supported rates.
Enable the Support Short Guard Interval checkbox to set a
guard interval (for interference protection) for 20 MHz and
40 MHz channel widths. When enabled, the AP’s radio
defines values to enable a packet to be transmitted with
guard interval based on the configuration and capabilities
of associated clients. Clients can associate to an Access
Point regardless of whether they support a short guard
interval.
If supporting 802.11n, select a Supported MCS index (0-
15). Set a MCS (modulation and coding scheme) in
respect to the radio’s channel width and guard interval. A
MCS defines (based on RF channel conditions) an optimal
combination of 8 data rates, bonded channels, multiple
spatial streams, different guard intervals and modulation
types. MUs can associate as long as they support basic
MCS (as well as non-11n basic rates).
Click OK to implement the selected rates and return to the
radio configuration screen. Clicking Cancel reverts the Set
Rates screen to the last saved configuration.