Extreme Networks Summit WM User Manual page 89

NOTE
Modifying Altitude AP radio properties can vary significantly depending on the model of the Altitude AP your are
configuring:
- For specific information on modifying an Altitude 802.11n AP, see
properties" on page 90.
- For specific information on modifying an Altitude AP 350-2i/350-2d or Outdoor AP, see
350-2i/350-2d radio properties" on page
Dynamic Radio Management (DRM)
When you modify an Altitude AP's radio properties, the Dynamic Radio Management (DRM)
functionality of the Summit WM Controller is used to help establish the optimum radio configuration
for your Altitude APs. DRM is enabled by default. The Summit WM Controller's DRM:
Adjusts transmit power levels to balance coverage between Altitude APs assigned to the same RF
domain and operating on the same channel.
Scans and coordinates with other Altitude APs to select an optimal operating channel.
The DRM feature consists of three functions:
Auto Channel Selection (ACS) - ACS provides an easy way to optimize channel arrangement based
on the current situation in the field. ACS provides an optimal solution only if it is triggered on all
Altitude APs in a deployment. Triggering ACS on a single Altitude AP or on a subset of Altitude
APs provides a useful but suboptimal solution. Also, ACS only relies on the information observed at
the time it is triggered. Once an Altitude AP has selected a channel, it will remain operating on that
channel until the user changes the channel or triggers ACS.
ACS can be triggered by one of the following events:
A new Altitude AP registers with the Summit WM Controller and the AP Default Settings
channel is Auto.
A user selects Auto from the Request New Channel drop-down list on the Altitude AP's radio
configuration tabs.
A user selects Auto from the Channel drop-down list on the AP Multi-edit page.
If Dynamic Channel Selection (DCS) is enabled in active mode and a DCS threshold is exceeded.
An Altitude AP detects radar on its current operating channel and it employs ACS to select a
new channel.
Channel Plan - If ACS is enabled, you can define a channel plan for the Altitude AP. Defining a
channel plan allows you to limit which channels are available for use during an ACS scan. For
example, you may want to avoid using specific channels because of low power, regulatory
domain, or radar interference.
Depending on the radio used, when defining a channel plan you can either create your
customized channel plan by selecting individual channels or you can select a default 3 or 4
channel plan.
You can use the channel plan to avoid transmission overlap on 40 MHz channels of the Altitude
802.11n APs. To avoid channel overlap between Altitude 802.11n APs that operate on 40 MHz
channels, configure the channel plan for the 5 GHz radio band as follows: 36, 44, 149, and 157 or
40, 48, 153, and 161. This solution limits the available channels to half of the available channels.
If using half of the available channels is not an option for your environment, do not configure a
channel plan. Instead, allow ACS to select from all available channels. This alternate solution may
contribute to increased congestion on the extension channels.
Summit WM User Guide, Software Version 5.3
"Modifying Altitude 802.11n AP 450/451 radio
106.
"Modifying Altitude AP
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