Cisco Catalyst 9800 Series Wireless Controller Software Configuration Guide, Cisco IOS XE Amsterdam 17.2.x

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Updated:
March 31, 2020

Chapter: Monitor Mode

Monitor Mode

Introduction to Monitor Mode

To optimize the monitoring and location calculation of RFID tags, you can enable tracking optimization on up to four channels within the 2.4-GHz band of an 802.11b/g/x access point radio. This feature allows you to scan only the channels on which tags are usually programmed to operate (such as channels 1, 6, and 11).


Note

You can move an AP to a particular mode (sensor mode to local mode or flex mode) using the site tag with the corresponding mode. If the AP is not tagged to any mode, it will fall back to the mode specified in the default site tag.

You must use clear in AP mode to return the AP back to client-serving mode, for example the local mode or FlexConnect mode depending on the remote site tag configuration.

Enable Monitor Mode (GUI)

Procedure

Step 1

Choose Configuration > Wireless > Access Points.

Step 2

In the Access Points page, expand the All Access Points section and click the name of the AP to edit.

Step 3

In the Edit AP page, click the General tab and from the AP Mode drop-down list, choose Monitor.

Step 4

Click Update & Apply to Device.

Step 5

Choose the mode for the AP as clear to return the AP back to the client-serving mode depending on the remote site tag configuration.

Enable Monitor Mode (CLI)

Procedure

  Command or Action Purpose

Step 1

ap name ap-name mode monitor

Example:

Device# ap name 3602a mode monitor

Enables monitor mode for the access point.

Step 2

ap name ap-name monitor tracking-opt

Example:

Device# ap name 3602a monitor tracking-opt

Configures the access point to scan only the Dynamic Channel Assignment (DCA) channels supported by its country of operation.

Step 3

ap name ap-name monitor-mode dot11b fast-channel [ first-channel second-channel third-channel fourth-channel ]

Example:

Device# ap name 3602a monitor dot11b 1 2 3 4

Chooses up to four specific 802.11b channels to be scanned by the access point.

In the United States, you can assign any value from 1 to 11 (inclusive) to the channel variable. Other countries support additional channels. You must assign at least one channel.

Note

 

Use the show ap dot11 24ghz channel command to see the available channels.

Step 4

show ap dot11 {24ghz | 5ghz} channel

Example:

Device# show ap dot11 5ghz channel

Shows configuration and statistics of 802.11a channel assignment.

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