diff --git a/neutron/common/config.py b/neutron/common/config.py
index f350fc1f8e5..0ed50919138 100644
--- a/neutron/common/config.py
+++ b/neutron/common/config.py
@@ -155,6 +155,7 @@ core_opts = [
                help=_('Number of seconds between sending events to nova if '
                       'there are any events to send.')),
     cfg.BoolOpt('advertise_mtu', default=True,
+                deprecated_for_removal=True,
                 help=_('If True, advertise network MTU values if core plugin '
                        'calculates them. MTU is advertised to running '
                        'instances via DHCP and RA MTU options.')),
diff --git a/releasenotes/notes/deprecate-advertise-mtu-51e3f78475a14efc.yaml b/releasenotes/notes/deprecate-advertise-mtu-51e3f78475a14efc.yaml
new file mode 100644
index 00000000000..2eae72558ec
--- /dev/null
+++ b/releasenotes/notes/deprecate-advertise-mtu-51e3f78475a14efc.yaml
@@ -0,0 +1,10 @@
+---
+deprecations:
+  - The 'advertise_mtu' option is deprecated and will be removed in Ocata.
+    There should be no use case to disable the feature, hence the option is
+    considered redundant. DHCP and L3 agents will continue advertising MTU
+    values to instances. Other plugins not using those agents are also
+    encouraged to advertise MTU to instances. The actual implementation of MTU
+    advertisement depends on the plugin in use, but it's assumed that at least
+    DHCP option for IPv4 clients and Router Advertisements for IPv6 clients is
+    supported.