Parameter Description
Band Steering ARM’s band steering feature encourages dual-band capable clients to stay on the
5GHz band on dual-band APs. This frees 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 supports both campus APs and remote APs that have a
virtual AP profile set to tunnel, split-tunnel or bridge forwarding mode. Note,
however, that if a campus or remote APs has virtual AP profiles configured in bridge
or split-tunnel forwarding mode but no virtual AP in tunnel mode, those APs will
gather information about 5G-capable clients independently and will not exchange
this information with other APs that also have bridge or split-tunnel virtual APs only.
Steering Mode Band steering supports the following three different band steering modes.
n Force-5GHz: When the AP is configured in force-5GHz band steering mode, the
AP will try to force 5Ghz-capable APs to use that radio band.
n Prefer-5GHz (Default): If you configure the AP to use prefer-5GHz band
steering mode, the AP will try to steer the client to 5G band (if the client is 5G
capable) but will let the client connect on the 2.4G band if the client persists in
2.4G association attempts.
n Balance-bands: In this band steering mode, the AP tries to balance the clients
across the two radios in order to best utilize the available 2.4G bandwidth. This
feature takes into account the fact that the 5Ghz band has more channels than
the 2.4 Ghz band, and that the 5Ghz channels operate in 40MHz while the
2.5Ghz band operates in 20MHz.
Dynamic Multicast
Optimization (DMO)
Enable/Disable dynamic multicast optimization. This parameter is disabled by
default, and cannot be enabled without the PEFNG license.
Drop Broadcast and
Multicast
Select the Drop Broadcast and Multicast check box to filter out broadcast and
multicast traffic in the air.
Do not enable this option for virtual APs configured in bridge forwarding mode. This
configuration parameter is only intended for use for virtual APs in tunnel mode. In
tunnel mode, all packets travel to the switch, so the switch is able to drop all
broadcast traffic. When a virtual AP is configured to use bridge forwarding mode,
most data traffic stays local to the AP, and the switch is not able to filter out that
broadcast traffic.
IMPORTANT: If you enable this option, you must also enable the Broadcast-Filter
ARP parameter on the virtual AP profile to prevent ARP requests from being
dropped. You can enable this parameter by checking the Convert Broadcast ARP
requests to unicast check box as described in the following parameter
description.
Table 97: Virtual AP Profile Parameters
AOS-W 6.5.3.x | User Guide Virtual APs | 415
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