Refs #23647. Add feature documentation.

Signed-off-by: Miguel Company <miguelcompany@eprosima.com>

Author: MiguelCompany

docs/fastdds/use_cases/ip_mobility/ip_mobility.rst

@@ -7,3 +7,17 @@
 IP mobility |Pro|
 =================
 
+DDS :ref:`Simple Discovery <simple_disc_settings>` relies on well-known multicast addresses and ports to relay the
+Participant announcement messages (see :ref:`disc_phases`).
+Such Participant announcement includes information about the unicast address-port pairs (a.k.a locators) where the
+Participant is expecting to receive incoming metatraffic data.
+The list with these unicast locators is automatically initialized taking into account the network interfaces that are
+available when the *Fast DDS* DomainParticipant is enabled.
+
+Fast DDS Pro detects changes in the system's IP addresses, and automatically updates them through the discovery
+protocol, so other participants start sending data to the new addresses.
+
+.. important::
+
+   This feature is only available in Windows and Linux.
+   MacOS will be supported in future releases.