5.11.5 Configure Rogue Host Protection
You are a network technician for a small corporate network. You would like to take advantage of the self healing features provided by the small enterprise wireless solution you have implemented. You are already logged in as WxAdmin on the Wireless Controller console from ITAdmin.
In this lab, your task is to perform the following:
• Configure self healing on the wireless network.
o Automatically adjust AP radio power to optimize coverage when interference is present.
o Set 2.4GHz and 5GHz radio channels to use the Background Scanning method to adjust for interference.
• Configure the background scanning needed for rogue device detection, AP locationing, and self healing. Background scans should be performed on all radios every 30 seconds.
• Configure load balancing for all radios by adjusting the threshold to 40dB.
• Configure band balancing to allow no more than 30% of clients to use the 2.4GHz radios.
• Reduce the power levels to -3dB for three access points in Building A to reduce RF emanations. Use the wireless survey results in the exhibit to identify the access points.
The amount to reduce TX Power by is a judgment call based on the wireless survey results. In practice, you would repeat the wireless survey to verify the proper TX Power settings.
Task Summary
Configure Self Healing Hide Details
Automatically adjust AP radio power
Use Background Scanning on 2.4GHz channels
Use Background Scanning on 5GHz channels
Configure Background Scanning Hide Details
Run a background scan every 30 seconds on the 2.4GHz radio
Run a background scan every 30 seconds on the 2.4GHz radio
Configure Load Balancing Hide Details
Run load balancing on the 2.4GHz radio with a 40dB threshold
Run load balancing on the 5GHz radio with a 40dB threshold
Configure Band Balancing for 30% on 2.4GHz
Adjust the AP Power Level Hide Details
Reduce 2.4GHz Radio Transmit power in Center AP by 1 to 3db
Reduce 5GHz Radio Transmit power in Center AP by 1 to 3db
Reduce 2.4GHz Radio Transmit power in East AP by 1 to 3db
Reduce 5GHz Radio Transmit power in East AP by 1 to 3db
Reduce 2.4GHz Radio Transmit power in West AP by 1 to 3db
Reduce 5GHz Radio Transmit power in West AP by 1 to 3db
Explanation
In this lab, you perform the following:
• Configure self healing on the wireless network.
o Automatically adjust AP radio power to optimize coverage when interference is present.
o Set 2.4GHz and 5GHz radio channels to use the Background Scanning method to adjust for interference.
• Configure background scanning necessary for rogue device detection, AP locationing, and self healing. Background scans should be performed on all radios every 30 seconds.
• Configure load balancing for all radios by adjusting the threshold to 40dB.
• Configure band balancing to allow no more than 30% of clients to use the 2.4GHz radios.
• Reduce the power levels to -3dB for three access points in Building A to reduce RF emanations. Use the wireless survey results in the exhibit to identify the access points.
Configure your wireless access points as follows:
1. Configure Self Healing as follows:
a. From the top, select the Configure tab.
b. From the left menu, select Services.
c. Select Automatically adjust AP radio power to optimize coverage when interference is present.
d. Under Automatically adjust 2.4GHz channels using, select Background Scanning from the drop-down menu.
e. Under Automatically adjust 5GHz channels using, select Background Scanning from the drop-down menu.
f. On the right, click Apply.
2. Configure Background Scanning as follows:
o Select Run a background scan on 2.4GHz radio.
o Enter 30 seconds.
o Select Run a background scan on 5GHz radio.
o Enter 30 seconds.
o On the right, click Apply.
3. Configure Load Balancing as follows:
o Select Run load balancing on 2.4GHz radio.
o In the Adjacent radio threshold(dB) field, enter 40.
o Select Run load balancing on 5GHz radio.
o In the Adjacent radio threshold(dB) field, enter 40.
o On the right, select Apply.
4. Configure Band Balancing as follows:
. Select Percent of clients on 2.4GHz radio.
a. Enter the percentage.
b. On the right, click Apply.
5. Adjust the AP Power Level as follows:
. From the left menu, select Access Points.
a. From the top right, select Exhibit to determine which access points to adjust.
b. Select Edit next to the access point to be modified.
c. Under Radio B/G/N(2.4G) next to TX Power, make sure Override Group Config is selected.
d. From the TX Power drop-down list, select -3dB (1/2).
e. Under Radio A/N/AC(5G) next to TX Power, make sure Override Group Config is selected.
f. From the TX Power drop-down list, select -3dB (1/2).
g. Click OK.
h. Repeat steps 6b - 6f for additional access points.