Dell W-Series 304 Instant 6.5.1.0-4.3.1.0 CLI Reference Guide - Page 742

Usage Guidelines This command configures radios that operate in the 5 GHz frequency band, which includes radios utilizing the IEEE 802.11a or IEEE 802.11n standard. Channels must be valid for the country configured in the AP regulatory domain profile (see ap regulatory-domain-profile on page 202).To view the supported channels, use the show ap allowed-channels command. APs initially start up with default ack-timeout, cts-timeout and slot-time values. When you modify the maximum-distance parameter in an rf dot11a radio profile or rf dot11g radio profile, new ack-timeout, ctstimeout and slot-time values may be derived, but those values are never less then the default values for an indoor AP. Mesh radios on outdoor APs have additional constraints, as mesh links may need to span long distances. For mesh radios on outdoor APs, the effect of the default maximum-distance parameter on the ack-timeout, cts-timeout and slot-time values depends on whether the APs are configured as mesh portals or mesh points. This is because mesh portals use a default maximum-distance value of 16,050 meters, and mesh points use, by default, the maximum possible maximum-distance value. The maximum-distance value should be set correctly to span the largest link distance in the mesh network so that when a mesh point gets the configuration from the network it will apply the correct ack-timeout, ctstimeout and slot-time values.The values derived from the maximum-distance setting depend on the band and whether 20Mhz/40MHz mode of operation is in use. The following table indicates values for a range of distances: Timeouts[usec] --- 5GHz radio --- --- 2.4GHz radio --- Distance[m] Ack CTS Slot Ack CTS Slot 0 (outdoor:16050m) 128 128 63 128 128 63 0 (indoor:600a,6450g) 25 25 9 64 48 9 200 (==default) 25 25 9 64 48 9 500 25 25 9 64 48 9 600 25 25 9 64 48 9 1050 28 28 13 64 48 31 5100 55 55 26 64 55 31 10050 88 88 43 88 88 43 15000 121 121 59 121 121 59 16050 128 128 63 128 128 63 58200(5G limit 20M) 409 409 203 - - - 52650(2.4G limit 20M) - - - 372 372 185 27450(5G limit 40M) 204 204 101 - - - 24750(2.4G limit 40M) - - - 186 186 92 Examples The following command configures APs to operate in AM mode for the selected dot11a-radio-profile named "samplea:" (host) (config) #rf dot11a-radio-profile samplea mode am-mode The following command configures APs to operate in high-throughput (802.11n) mode on the 5 Ghz frequency band for the selected dot11a-radio profile named "samplea" and assigns a high-throughout radio profile named "default-a:" (host) (config) #rf dot11a-radio-profile samplea high-throughput-enable ht-radio-profile default-a The following command configures a primary channel number of 157 and a secondary channel number of 161 for 40 MHz mode of operation for the selected dot11a-radio profile named "samplea:" (host) (config) #rf dot11a-radio-profile samplea channel 742| rf dot11a-radio-profile Dell Networking W-Series ArubaOS 6.5.x | Reference Guide