diff --git a/tripleo_common/inventory.py b/tripleo_common/inventory.py
index 1b1fc8279..104961467 100644
--- a/tripleo_common/inventory.py
+++ b/tripleo_common/inventory.py
@@ -132,6 +132,10 @@ class NeutronData(object):
 
         ports_by_role_and_host = {}
         for port in self.ports:
+            # Ignore ports in networks we ignore, i.e the OVN Bridge MAC net
+            if port.network_id not in self.networks_by_id:
+                continue
+
             tags = self._tags_to_dict(port.tags)
             # In case of missing required tags, raise an error.
             # neutron is useless as a inventory source in this case.