Users Guide

Table Of Contents
462| Adaptive Radio Management Dell Networking W-Series ArubaOS 6.5.x| User Guide
Setting Description Defaults
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.
For additional information on how this the Channel
Index is calculated, see ARM Coverage and
Interference Metrics on page 453.
In 6.4.4.0 and later
releases:
l default-a: 40
l default-g: 25
In earlier 6.4.x
releases:
l default: 25
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.
Range: 120–3600 seconds.
240 sec
Error Rate Threshold The minimum percentage of PHY errors and MAC
errors in the channel that will trigger a channel
change.
In 6.4.4.0 and later
releases:
l default-a: 70%
l default-g: 70%
In earlier 6.4.x
releases:
l 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.
In 6.4.4.0 and later
releases:
l default-a: 90 sec
l default-g: 90 sec
In earlier 6.4.x
releases:
l default: 30 sec
Channel Quality
Aware Arm
Enable this feature to base ARM changes upon an
internally calculated channel quality metric. When
this feature is disabled, ARM initiates channel
changes based on thresholds defined in this profile,
and chooses the channel based on the calculated
interference index value. Default: Disabled
Disabled
Channel Quality
Threshold
Channel quality percentage below which ARM
initiates a channel change.
70%
Table 100: ARM Profile Configuration Parameters