353| Adaptive Radio Mana gement (ARM ) DellPowerConnect W- Series ArubaOS 6.2 | User Guide
Setting Description
Default:enabled
VoIPAware
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 wil l
notattempt to scan a different channel i f one of its clients has an active VoIP call. Thisoption requi res
thatScanning is al so enabled.
Default:disabled
Power Save
AwareS can
Ifenabled, theAP will notscan a different channel i f it has one or more clients that is in powersave
mode.
Default:disabled
Video Aware
Scan
Aslong as there is at least one video frame every 100mSectheAP w ill reject an ARM scanning request.
Notethat for each radio interface, video frames must be defined in one of two ways:
lClassifythe frame as video traffic via a session ACL.
lEnable WMM on the WLAN’sS SIDprofil e and define a specific DSCP value as a video stream. Next,
createa session ACL to tag the video trafficw ith thethat DSCP value.
IdealCoverage
Index
TheDell coverageindex metric is a weighted calcul ation based on theRF coverage for all Dell APsand
neighboring APs on a specified channel. The Ideal Coverage Index specifies the ideal coverage that an
APshould try to achieve on its channel. The denser the AP deployment, the lower this value should be.
Therange of possible values is 2–20.
Default:10
Foradditional informationon how this the Coverage Index is calculated, see "ARM Metrics" on page 361
Acceptable
CoverageIndex
Formul ti-band implementations, the Acceptable Coverage Index specifies the minimal coverage an AP it
shouldachi eveon i tschannel. Thedenser the AP deployment, the lower this value should be. The range
ofpossible values i s 1–6.
Default:4
FreeChannel
Index
TheDell Interferenceindex 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-partyAPs).
AnAP wi ll only move to a new channel if the new channel has a lower interference index value than the
currentchannel. FreeChannel Index specifies the required difference between the two interference
indexvalues before the AP moves to the new channel. The lower this value, the more li kelyi ti sthat the
APwi ll move to the new channel. The range of possible values is 10–40.
Default:25
Foradditional informationon how thisthe Channel Indexis calculated, see "A RM Metrics"on page 361
BackoffTime Afteran AP changes channel or power settings, it waits for the backofftim e interval beforei tasks for a
new channel/power setting. The range ofpossible values is 120–3600 seconds.
Default:240 seconds
ErrorR ate
Threshold
Them inimum percentage of PHY errors and MAC errors in the channel thatw ill trigger a channel
change.
Default:50%
ErrorR ateW ait
Time
Minimum time in seconds the error rate has toexceed the Error Rate Threshold before it triggers a
channel change.
Default:30 seconds
NoiseThreshold Maximum level of noise in channel that triggers a channel change. The supported range forthis setting is
0–2,147,483,647dBm.
Default75 dBm
NoiseW ait Minimum time in seconds the noise level has to exceed theNoi seThreshold before it triggers a channel