Wireless AP: 802.11g/n: 20MHz instead of 40MHz

Note that 802.11g/n might use 20MHz channels instead of the expected
40MHz when overlapping BSSes are found in the neighbourhood.

Although we could force our AP to use 40MHz, we won't, as that might
break the law (depending on the law applicable on the customer's
premises).

Change-Id: I7dba9bb73352403f04129175044ac2d5e400eede
Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

1 files changed, 11 insertions, 1 deletions

diff --git a/doc/book-enea-edge-getting-started/doc/net_config_options.xml b/doc/book-enea-edge-getting-started/doc/net_config_options.xml
index 7238fef..9c9dfe2 100644
--- a/doc/book-enea-edge-getting-started/doc/net_config_options.xml
+++ b/doc/book-enea-edge-getting-started/doc/net_config_options.xml
@@ -925,5 +925,15 @@
       menu and selecting <emphasis role="bold">External
       Interfaces</emphasis>.</para>
     </note>
+
+    <note>
+      <para>For the 2.4GHz band, the <literal>802.11 g/n</literal> wireless
+      mode will use a 40MHz channel width by default. For regulatory
+      requirements compliance, channels are scanned in order to avoid
+      overlapping with existing networks. If overlaps are detected, primary
+      and secondary Wireless AP channels will be swapped, resulting in an
+      effective channel width of 20MHz instead of 40Mhz being used.
+      To avoid this, select another wireless channel.</para>
+    </note>
   </section>
-</chapter>
\ No newline at end of file
+</chapter>