Cisco 4G-LTE-ANTM-O-3 Installation Guide download pdf (Page 231)

• Message Integrity Check (MIC)—MIC is an additional WEP security feature that prevents attacks on

encrypted packets called bit-flip attacks. The MIC, implemented on the wireless device and all associated

client devices, adds a few bytes to each packet to make the packets tamper-proof.

• Load balancing—The wireless device uses Aironet extensions to direct client devices to an access point

that provides the best connection to the network on the basis of such factors as number of users, bit error

rates, and signal strength.

• Cisco Key Integrity Protocol (CKIP)—Cisco’s WEP key permutation technique is based on an early

algorithm presented by the IEEE 802.11i security task group. The standards-based algorithm, Temporal

Key Integrity Protocol (TKIP), does not require Aironet extensions to be enabled.

• World mode (legacy only)—Client devices with legacy world mode enabled receive carrier set information

from the wireless device and adjust their settings automatically. Aironet extensions are not required for

802.11d world mode operation.

• Limiting the power level on associated client devices—When a client device associates to the wireless

device, the wireless device sends the maximum allowed power level setting to the client.

Disabling Aironet extensions disables the features listed above, but it sometimes improves the ability of

non-Cisco client devices to associate to the wireless device.

Disabling Aironet Extensions

Aironet extensions are enabled by default. To disable Aironet extensions, follow these steps, beginning in

privileged EXEC mode:

SUMMARY STEPS

configure terminal

interface dot11radio {0 }

no dot11 extension aironet

end

copy running-config startup-config

DETAILED STEPS

PurposeCommand or Action

Enters global configuration mode.configure terminal

Step 1

Enters interface configuration mode for the radio interface.interface dot11radio {0 }

Step 2

The 802.11g/n 2.4-GHz radio is radio 0.

Disables Aironet extensions.no dot11 extension aironet

Step 3

Returns to privileged EXEC mode.end

Step 4

(Optional) Saves your entries in the configuration file.copy running-config startup-config

Step 5

Cisco 800 Series Integrated Services Routers Software Configuration Guide

OL-31704-02 203

Configuring Wireless Devices

Disabling and Enabling Aironet Extensions

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Cisco 4G-LTE-ANTM-O-3 Installation Guide Page 231