Users Guide

6. Select Adaptive Radio management (ARM) Profile.
7. Click the Adaptive Radio Management (ARM) Profile drop-down list in the right window pane, and
select a new ARM profile.
8. (Optional) repeat steps 6–8 to assign an ARM profile to another 802.11a or 802.11g radio profile.
9. Click Apply.
You can also assign an ARM profile to an AP group by selecting a radio profile, identifying an AP group assigned
to that radio profile, and then assigning an ARM profile to one of those groups.
1. Select Configuration > Advanced Services> All Profiles.
2. Select RF Management, and then expand either the 802.11a radio profile or 802.11b radio profile.
3. Select an individual radio profile name to expand that profile.
4. Click Adaptive Radio Management (ARM) Profile, and then use the Adaptive Radio management
(ARM) Profile drop-down list in the right window pane to select a new ARM profile for that radio.
In the CLI
To assign an ARM profile to an AP group via the command-line interface, access the CLI in config mode and
issue the following commands where <ap_profile> is the name of the AP group, and <arm_profile> is the
name of the ARM profile you want to assign to that radio band.:
(host)(config) #rf dot11a-radio-profile <ap_profile> arm-profile <arm_profile>
(host)(config) #rf dot11g-radio-profile <ap_profile> arm-profile <arm_profile>
Using Multi-Band ARM for 802.11a/802.11g Traffic
It is recommended that you use the multi-band ARM assignment and Mode Aware ARM feature for single-
radio APs in networks with traffic in the 802.11a and 802.11g bands. This feature allows a single-radio AP to
dynamically change its radio bands based on current coverage on the configured band. This feature is enabled
via the AP's ARM profile.
When you first provision a single-radio AP, it initially operates in the radio band specified in its AP system
profile. If the AP finds adequate coverage on multiple channels in its current band of operation, the mode-
aware feature allows the AP to temporarily turn itself off and become an AP Air Monitor (APM). In AP Monitor
mode, the AP scans all channels across both bands to verify that each channel meets or exceeds its required
level of acceptable radio coverage (as defined by the in the ARM profile).
If the AP Monitor detects that a channel on the 802.11g band does not have adequate radio coverage, it will
convert back to an AP on that 802.11 channel. If the 802.11g band is adequately covered, the AP Monitor will
next check the 802.11a band. If a channel on the 802.11a band lacks coverage, the AP Monitor will convert
back to an AP on that 802.11a channel.
Band Steering
ARM’s band steering feature encourages dual-band capable clients to stay on the 5GHz band on dual-band APs,
freeing up resources on the 2.4GHz band for single-band clients like VoIP phones. Band steering reduces co-
channel interference and increases available bandwidth for dual-band clients, because there are more channels
on the 5GHz band than on the 2.4GHz band. Dual-band 802.11n-capable clients may see even greater
bandwidth improvements, because the band steering feature will automatically select between 40MHz or
20MHz channels in 802.11n networks. This feature is disabled by default, and must be enabled in a Virtual AP
profile.
The band steering feature considers several metrics before it determines if a client should be steered to the
5GHz band, including client RSSI. For example, this feature will only steer a client to the 5GHz band if that client
Dell Networking W-Series ArubaOS 6.5.x | User Guide Adaptive Radio Management |
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