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353 | AdaptiveRadioManagement (ARM) DellPowerConnectW-SeriesArubaOS6.2 | User Guide
Setting Description
Default: enabled
VoIP Aware
Scan
Dell’s VoIP Call Admission Control (CAC) prevents any single AP from becoming congested with voice
calls. When you enable CAC, you should also enable VoIP Aware Scan in the ARM profile, so the AP will
not attempt to scan a different channel if one of its clients has an active VoIP call. This option requires
that Scanning is also enabled.
Default: disabled
Power Save
Aware Scan
If enabled, the AP will not scan a different channel if it has one or more clients that is in power save
mode.
Default: disabled
Video Aware
Scan
As long as there is at least one video frame every 100mSec the AP will reject an ARM scanning request.
Note that for each radio interface, video frames must be defined in one of two ways:
l Classify the frame as video traffic via a session ACL.
l Enable WMM on the WLAN’s SSID profile and define a specific DSCP value as a video stream. Next,
create a session ACL to tag the video traffic with the that DSCP value.
Ideal Coverage
Index
The Dell coverage index metric is a weighted calculation based on the RF coverage for all DellAPs and
neighboring APs on a specified channel. The Ideal Coverage Index specifies the ideal coverage that an
AP should try to achieve on its channel. The denser the AP deployment, the lower this value should be.
The range of possible values is 2–20.
Default: 10
For additional information on how this the Coverage Index is calculated, see "ARM Metrics" on page 361
Acceptable
Coverage Index
For multi-band implementations, the Acceptable Coverage Index specifies the minimal coverage an AP it
should achieve on its channel. The denser the AP deployment, the lower this value should be. The range
of possible values is 1–6.
Default: 4
Free Channel
Index
The Dell Interference index metric measures interference for a specified channel and its surrounding
channels. This value is calculated and weighted for all APs on those channels (including 3rd-party APs).
An AP will only move to a new channel if the new channel has a lower interference index value than the
current channel. Free Channel Index specifies the required difference between the two interference
index values before the AP moves to the new channel. The lower this value, the more likely it is that the
AP will move to the new channel. The range of possible values is 10–40.
Default: 25
For additional information on how this the Channel Index is calculated, see "ARM Metrics" on page 361
Backoff Time After an AP changes channel or power settings, it waits for the backoff time interval before it asks for a
new channel/power setting. The range of possible values is 120–3600 seconds.
Default: 240 seconds
Error Rate
Threshold
The minimum percentage of PHY errors and MAC errors in the channel that will trigger a channel
change.
Default: 50%
Error Rate Wait
Time
Minimum time in seconds the error rate has to exceed the Error Rate Threshold before it triggers a
channel change.
Default: 30 seconds
Noise Threshold Maximum level of noise in channel that triggers a channel change. The supported range for this setting is
0–2,147,483,647 dBm.
Default 75 dBm
Noise Wait Minimum time in seconds the noise level has to exceed the Noise Threshold before it triggers a channel