diff --git a/etc/network/interfaces.d/aio_interfaces.cfg b/etc/network/interfaces.d/aio_interfaces.cfg
index 063c87a427..eede893335 100644
--- a/etc/network/interfaces.d/aio_interfaces.cfg
+++ b/etc/network/interfaces.d/aio_interfaces.cfg
@@ -54,3 +54,11 @@ iface br-vlan inet static
     post-down ip link del br-vlan-veth || true
     bridge_ports br-vlan-veth
 
+# Add an additional address to br-vlan
+iface br-vlan inet static
+    # Flat network default gateway
+    # -- This needs to exist somewhere for network reachability
+    # -- from the router namespace for floating IP paths.
+    # -- Putting this here is primarily for tempest to work.
+    address 172.29.248.1
+    netmask 255.255.252.0