Extreme Networks Summit WM User Manual page 101

DCS Channel Occupancy Threshold - Type the channel utilization level, measured as a
percentage, after which ACS will scan for a new operating channel for the Altitude AP if the
threshold is exceeded.
DCS Update Period - Type the time, measured in minutes that determines the period during
which the Altitude AP averages the DCS Noise Threshold and DCS Channel Occupancy
Threshold measurements. If either one of these thresholds is exceeded, then the Altitude AP
will trigger ACS.
Antenna Selection - Click the antenna, or antenna combination, you want to configure on this
radio.
NOTE
When you configure the Wireless 802.11n AP to use specific antennas, the transmission power is recalculated; the
Current Tx Power Level value for the radio is automatically adjusted to reflect the recent antenna configuration. It
takes approximately 30 seconds for the change to the Current Tx Power Level value to be reflected in the Summit
WM GUI. Also, the radio is reset; the radio is reset causing client connections on this radio to be lost.
12 In the 11n Settings section, do the following:
Protection Mode - Click a protection mode: Enabled or Disabled. This protects high throughput
transmissions on primary channels from non-11n APs and clients. Click Disabled if non-11n APs
and clients are not expected. Click Enabled if you expect many non-11n APs and clients. The
overall throughput is reduced when Protection Mode is enabled.
40MHz Protection Mode - Click a protection type, CTS Only or RTS- CTS, or None, when a
40MHz channel is used. This protects high throughput transmissions on extension channels from
interference from non-11n APs and clients.
40MHz Prot. Channel Offset - Select a 20MHz channel offset if the deployment is using channels
that are 20MHz apart (for example, using channels 1, 5, 9, and 13) or a 25MHz channel offset if
the deployment is using channels that are 25MHz apart (for example, using channels 1, 6, and
11).
40MHz Channel Busy Threshold - Type the extension channel threshold percentage, which if
exceeded, will disable transmissions on the extension channel (40MHz).
Aggregate MSDUs - Click an aggregate MSDU mode: Enabled or Disabled. Aggregate MSDU
increases the maximum frame transmission size.
Aggregate MSDU Max Length - Type the maximum length of the aggregate MSDU. The value
range is 2290-4096 bytes.
Aggregate MPDUs - Click an aggregate MPDU mode: Enabled or Disabled. Aggregate MPDU
provides a significant improvement in throughput.
Aggregate MPDU Max Length - Type the maximum length of the aggregate MPDU. The value
range is 1024-65535 bytes.
Agg. MPDU Max # of Sub-frames - Type the maximum number of sub-frames of the aggregate
MPDU. The value range is 2-64.
ADDBA Support - Click an ADDBA support mode: Enabled or Disabled. ADDBA, or block
acknowledgement, provides acknowledgement of a group of frames instead of a single frame.
ADDBA Support must be enabled if Aggregate APDU is enable.
13 To save your changes, click Save.
Summit WM User Guide, Software Version 5.3
101