A customer has dual-band devices that they want to use 40 MHz channels. If the customer is using Cisco 3600 Series access points with a 5508 controller. Which setting assists with this change?

The correct answer is A. Enable band select globally.. Enabling band select globally steers dual-band capable clients toward the 5 GHz radio instead of 2.4 GHz. This is the key setting because 40 MHz channel bonding is impractical on 2.4 GHz - the entire 2.4 GHz band only contains three non-overlapping 20 MHz channels, so bonding two

Wireless Infrastructure

Question

Options

AEnable band select globally.
BEnable aggressive load balancing.
CDisable lower data rates on 802 .11G GHz radios.
DDisable overlapping 802.11G channels.

How the community answered

(32 responses)

A
81% (26)
B
9% (3)
C
6% (2)
D
3% (1)

Explanation

Enabling band select globally steers dual-band capable clients toward the 5 GHz radio instead of 2.4 GHz. This is the key setting because 40 MHz channel bonding is impractical on 2.4 GHz - the entire 2.4 GHz band only contains three non-overlapping 20 MHz channels, so bonding two channels would consume most of the band and cause severe co-channel interference. The 5 GHz band offers many more non-overlapping channels (up to 24 in some regions), making 40 MHz channel bonding viable. By enabling band select, dual-band devices are redirected to 5 GHz where 40 MHz channels can be used effectively, fulfilling the customer's requirement. Aggressive load balancing and disabling lower data rates are separate QoS/performance tuning steps unrelated to enabling 40 MHz channels.

Topics

#band select#40 MHz channels#dual-band#5 GHz

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