.. _example_interfaces_wlan_blockedchannels:

################
Blocked Channels
################

The following scenarios show how to define a ``blocked-channels`` list,
which tells the auto-channel selection algorithm the channels to skip
when selecting the best channel. In practical terms, the behavior is
the opposite of the channel plan where channels are explicitly
allowed.

*******************************************
Non-Overlapping Channels On The 2.4GHz Band
*******************************************

Description
===========

In this example, the 2.4 GHz radio controller will be configured to use
``auto-channel selection`` with channel plan ``1,6,11``. This configuration
is very common because this is the largest list of non-overlapping channels on
the 2.4 GHz band, ensuring the AP will not cause adjacent-channel interference.

Scenario
========

.. include:: blockedchannels/non-overlappingchannelsonthe2.4ghzband

.. raw:: html

  <hr>

***********************************
Non-Radar Channels On The 5GHz Band
***********************************

Description
===========

In this example, the 5 GHz radio controller will be configured to use
``auto-channel selection`` with channel plan ``${allowed_channels}``. This configuration is
used to avoid selecting radar channels (which require at least 1 minute of CAC before they
start working): ``${blocked_channels}``.

Scenario
========

.. include:: blockedchannels/non-radarchannelsonthe5ghzband

.. raw:: html

  <hr>