Extreme Networks Summit WM User Manual page 94

Configuring the Altitude AP
NOTE
Depending on the radio options you select, some of the radio settings may not be available for configuration.
Channel Width - Click the channel width for the radio:
20MHz - Click to allow 802.11n clients to use the primary channel (20MHz) and non-802.11n
clients, beacons, and multicasts to use the 802.11b/g radio protocols.
40MHz - Click to allow 802.11n clients that support the 40MHz frequency to use 40MHz,
20MHz, or the 802.11b/g radio protocols. 802.11n clients that do not support the 40MHz
frequency can use 20MHz or the 802.11b/g radio protocols and non-802.11n clients, beacons,
and multicasts use the 802.11b/g radio protocols.
Auto - Click to automatically switch between 20MHz and 40MHz channel widths, depending
on how busy the extension channel is.
DTIM Period - Type the desired DTIM (Delivery Traffic Indication Message) period - the number
of beacon intervals between two DTIM beacons. To ensure the best client power savings, use a
large number. For example, 5. Use a small number to minimize broadcast and multicast delay.
The default value is 5.
Beacon Period - Type the desired time, in milliseconds, between beacon transmissions. The
default value is 100 milliseconds.
RTS/CTS Threshold - Type the packet size threshold, in bytes, above which the packet will be
preceded by an RTS/CTS (Request to Send/Clear to Send) handshake. The default value is 2346,
which means all packets are sent without RTS/CTS. Reduce this value only if necessary.
Frag. Threshold - Type the fragment size threshold, in bytes, above which the packets will be
fragmented by the Altitude 802.11n AP prior to transmission. The default value is 2346, which
means all packets are sent unfragmented. Reduce this value only if necessary.
5 In the Basic Radio Settings section, do the following:
Request New Channel - Click the wireless channel you want the Wireless 802.11n AP to use to
communicate with wireless devices.
Click Auto to request the ACS to search for a new channel for the Wireless 802.11n AP, using a
channel selection algorithm. This forces the Wireless 802.11n AP to go through the auto-channel
selection process again.
NOTE
ACS in the 2.4 GHz radio band with 40 MHz channels is not recommended due to severe co-channel
interference.
Depending on the regulatory domain (based on country), some channels may be restricted. The
default value is based on North America. For more information, see
information."
Channel Bonding - Click the bonding method, Up or Down. The primary channel (20MHz) is
bonded with an extension channel that is either 20MHz above (bonding up) or 20MHz below
(bonding down) of the primary channel. Depending on the channel that is selected in the
Request New Channel drop-down list, you may be prevented from bonding Up or Down in the
Channel Bonding drop-down list.
Guard Interval - Click a guard interval, Long or Short, when a 40MHz channel is used. It is
recommended to use a short guard interval in small rooms (for example, a small office space) and
a long guard interval in large rooms (for example, a conference hall).
94
Appendix B, "Regulatory
Summit WM User Guide, Software Version 5.3