Use real Neutron network for L3 GW by default
Relying on 'external_network_bridge=br-ex' for the L3
agent has been deprecated in Neutron. This patch adjusts
the devstack defaults to setup Neutron in the preferred
manner (empty external_network_bridge value and
correct bridge_mappings for the L2 agent).
This will also help with correct MTU calculations now that
the external network will have the correct segmentation
type on it ('flat' now instead of 'vxlan' by default).
Related-Bug: #1511578
Related-Bug: #1603493
Change-Id: Id20e67aba5dfd2044b82c700f41c6e648b529430
diff --git a/lib/neutron-legacy b/lib/neutron-legacy
index f4e577d..f83492b 100644
--- a/lib/neutron-legacy
+++ b/lib/neutron-legacy
@@ -203,7 +203,7 @@
# agent, as described below.
#
# Example: ``PHYSICAL_NETWORK=default``
-PHYSICAL_NETWORK=${PHYSICAL_NETWORK:-}
+PHYSICAL_NETWORK=${PHYSICAL_NETWORK:-public}
# With the openvswitch agent, if using VLANs for tenant networks,
# or if using flat or VLAN provider networks, set in ``localrc`` to
@@ -213,7 +213,7 @@
# port for external connectivity.
#
# Example: ``OVS_PHYSICAL_BRIDGE=br-eth1``
-OVS_PHYSICAL_BRIDGE=${OVS_PHYSICAL_BRIDGE:-}
+OVS_PHYSICAL_BRIDGE=${OVS_PHYSICAL_BRIDGE:-br-ex}
# With the linuxbridge agent, if using VLANs for tenant networks,
# or if using flat or VLAN provider networks, set in ``localrc`` to