diff --git a/environments/updates/README.md b/environments/updates/README.md
index 8c03411d9a..426d73297c 100644
--- a/environments/updates/README.md
+++ b/environments/updates/README.md
@@ -7,3 +7,6 @@ Contents
 **update-from-keystone-admin-internal-api.yaml**
   To be used if the Keystone Admin API was originally deployed on the
   Internal API network.
+
+**update-from-publicvip-on-ctlplane.yaml**
+  To be used if the PublicVirtualIP resource was deployed as an additional VIP on the 'ctlplane'.
diff --git a/environments/updates/update-from-publicvip-on-ctlplane.yaml b/environments/updates/update-from-publicvip-on-ctlplane.yaml
new file mode 100644
index 0000000000..c62428b4c5
--- /dev/null
+++ b/environments/updates/update-from-publicvip-on-ctlplane.yaml
@@ -0,0 +1,2 @@
+resource_registry:
+  OS::TripleO::Network::Ports::ExternalVipPort: ../../network/ports/ctlplane_vip.yaml
\ No newline at end of file