[#3144] updated docs

diff --git a/doc/sphinx/arm/ctrl-channel.rst b/doc/sphinx/arm/ctrl-channel.rst
index 679285f7b04513520be7b92df6ecc8ad1a52d38c..d1f3bdd1742a8fb8cc1b9e460d0b71ee4a63b232 100644 (file)
--- a/doc/sphinx/arm/ctrl-channel.rst
+++ b/doc/sphinx/arm/ctrl-channel.rst
@@ -515,6 +515,12 @@ The command takes as parameter the list of interfaces with respective
 addresses (if specified) on which the server should start listening for
 DHCP traffic.
 
+.. note::
+
+   The command can only append to the existing list of interfaces.
+   There is no way to remove an interface once it has been added and
+   the server has started listening for DHCP traffic.
+
 Please note that the new configuration is
 retained in memory only; if the server is restarted or a configuration
 reload is triggered via a signal, the server uses the configuration
@@ -526,6 +532,9 @@ string, ``text``, describing the outcome:
 
        {"result": 0, "text": "Configuration successful." }
 
+The updated configuration can also be retrieved using the :isccmd:`config-get`
+command (inside the "interfaces-config" configuration map).
+
 .. isccmd:: list-commands
 .. _command-list-commands: