Updates and fixes to NIC config template routes

This change adds the ManagementInterfaceDefaultRoute parameter
for setting the Management network as the default route in some
deployments. Notes were added to indicate that if the Management
network is used as the default gateway, then the default route
on the control plane should be commented out.

The sample network-environment.yaml was modified to include the
ManagementInterfaceDefaultRoute, but this is commented out like
the rest of the Management network parameters.

This change also adds the ControlPlaneDefaultRoute and
ExternalInterfaceDefaultRoute to all templates, so that if the
networks are customized, the NIC configs can be modified without
having to modify the parameters section of the template. The
default for the ExternalInterfaceDefaultRoute is '10.0.0.1', and
the default for ManagementInterfaceDefaultRoute is set to 'unset'.

This change also converts the single-nic-linux-bridge-vlans from
DHCP to static IPs on the Control Plane Interface, bringing these
templates in line with the rest of the NIC config templates. The
parameters needed to be updated in these templates as well.

The controller-v6.yaml templates had a default value of "10.0.0.1"
for the ExternalInterfaceDefaultRoute. This was confusing, and is
now undefined.

This change also sets a default gateway on the Control Plane in
controller-no-external.yaml templates.

Change-Id: I8ea6733fe46902e1baeff4ccfbcd42ecc5a1825f

26 files changed, 730 insertions, 43 deletions

diff --git a/network/config/bond-with-vlans/ceph-storage.yaml b/network/config/bond-with-vlans/ceph-storage.yaml
index 93db8666..b414747f 100644
--- a/network/config/bond-with-vlans/ceph-storage.yaml
+++ b/network/config/bond-with-vlans/ceph-storage.yaml
@@ -38,6 +38,14 @@ parameters:
     description: The ovs_options string for the bond interface. Set things like
                  lacp=active and/or bond_mode=balance-slb using this option.
     type: string
+  ExternalNetworkVlanID:
+    default: 10
+    description: Vlan ID for the external network traffic.
+    type: number
+  InternalApiNetworkVlanID:
+    default: 20
+    description: Vlan ID for the internal_api network traffic.
+    type: number
   StorageNetworkVlanID:
     default: 30
     description: Vlan ID for the storage network traffic.
@@ -46,6 +54,10 @@ parameters:
     default: 40
     description: Vlan ID for the storage mgmt network traffic.
     type: number
+  TenantNetworkVlanID:
+    default: 50
+    description: Vlan ID for the tenant network traffic.
+    type: number
   ManagementNetworkVlanID:
     default: 60
     description: Vlan ID for the management network traffic.
@@ -57,6 +69,14 @@ parameters:
   ControlPlaneDefaultRoute: # Override this via parameter_defaults
     description: The default route of the control plane network.
     type: string
+  ExternalInterfaceDefaultRoute: # Not used by default in this template
+    default: '10.0.0.1'
+    description: The default route of the external network.
+    type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
   DnsServers: # Override this via parameter_defaults
     default: []
     description: A list of DNS servers (2 max for some implementations) that will be added to resolv.conf.
@@ -123,6 +143,8 @@ resources:
                     -
                       ip_netmask: {get_param: StorageMgmtIpSubnet}
                 # Uncomment when including environments/network-management.yaml
+                # If setting default route on the Management interface, comment
+                # out the default route on the Control Plane.
                 #-
                 #  type: vlan
                 #  device: bond1
@@ -130,6 +152,10 @@ resources:
                 #  addresses:
                 #    -
                 #      ip_netmask: {get_param: ManagementIpSubnet}
+                #  routes:
+                #    -
+                #      default: true
+                #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:
diff --git a/network/config/bond-with-vlans/cinder-storage.yaml b/network/config/bond-with-vlans/cinder-storage.yaml
index bea98c19..5ee9ff09 100644
--- a/network/config/bond-with-vlans/cinder-storage.yaml
+++ b/network/config/bond-with-vlans/cinder-storage.yaml
@@ -38,6 +38,10 @@ parameters:
     description: The ovs_options string for the bond interface. Set things like
                  lacp=active and/or bond_mode=balance-slb using this option.
     type: string
+  ExternalNetworkVlanID:
+    default: 10
+    description: Vlan ID for the external network traffic.
+    type: number
   InternalApiNetworkVlanID:
     default: 20
     description: Vlan ID for the internal_api network traffic.
@@ -50,6 +54,10 @@ parameters:
     default: 40
     description: Vlan ID for the storage mgmt network traffic.
     type: number
+  TenantNetworkVlanID:
+    default: 50
+    description: Vlan ID for the tenant network traffic.
+    type: number
   ManagementNetworkVlanID:
     default: 60
     description: Vlan ID for the management network traffic.
@@ -61,6 +69,14 @@ parameters:
   ControlPlaneDefaultRoute: # Override this via parameter_defaults
     description: The default route of the control plane network.
     type: string
+  ExternalInterfaceDefaultRoute: # Not used by default in this template
+    default: '10.0.0.1'
+    description: The default route of the external network.
+    type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
   DnsServers: # Override this via parameter_defaults
     default: []
     description: A list of DNS servers (2 max for some implementations) that will be added to resolv.conf.
@@ -134,6 +150,8 @@ resources:
                     -
                       ip_netmask: {get_param: StorageMgmtIpSubnet}
                 # Uncomment when including environments/network-management.yaml
+                # If setting default route on the Management interface, comment
+                # out the default route on the Control Plane.
                 #-
                 #  type: vlan
                 #  device: bond1
@@ -141,6 +159,10 @@ resources:
                 #  addresses:
                 #    -
                 #      ip_netmask: {get_param: ManagementIpSubnet}
+                #  routes:
+                #    -
+                #      default: true
+                #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:
diff --git a/network/config/bond-with-vlans/compute.yaml b/network/config/bond-with-vlans/compute.yaml
index 774bf02d..19c011eb 100644
--- a/network/config/bond-with-vlans/compute.yaml
+++ b/network/config/bond-with-vlans/compute.yaml
@@ -38,6 +38,10 @@ parameters:
     description: The ovs_options string for the bond interface. Set things like
                  lacp=active and/or bond_mode=balance-slb using this option.
     type: string
+  ExternalNetworkVlanID:
+    default: 10
+    description: Vlan ID for the external network traffic.
+    type: number
   InternalApiNetworkVlanID:
     default: 20
     description: Vlan ID for the internal_api network traffic.
@@ -46,6 +50,10 @@ parameters:
     default: 30
     description: Vlan ID for the storage network traffic.
     type: number
+  StorageMgmtNetworkVlanID:
+    default: 40
+    description: Vlan ID for the storage mgmt network traffic.
+    type: number
   TenantNetworkVlanID:
     default: 50
     description: Vlan ID for the tenant network traffic.
@@ -61,6 +69,14 @@ parameters:
   ControlPlaneDefaultRoute: # Override this via parameter_defaults
     description: The default route of the control plane network.
     type: string
+  ExternalInterfaceDefaultRoute: # Not used by default in this template
+    default: '10.0.0.1'
+    description: The default route of the external network.
+    type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
   DnsServers: # Override this via parameter_defaults
     default: []
     description: A list of DNS servers (2 max for some implementations) that will be added to resolv.conf.
@@ -134,6 +150,8 @@ resources:
                     -
                       ip_netmask: {get_param: TenantIpSubnet}
                 # Uncomment when including environments/network-management.yaml
+                # If setting default route on the Management interface, comment
+                # out the default route on the Control Plane.
                 #-
                 #  type: vlan
                 #  device: bond1
@@ -141,6 +159,10 @@ resources:
                 #  addresses:
                 #    -
                 #      ip_netmask: {get_param: ManagementIpSubnet}
+                #  routes:
+                #    -
+                #      default: true
+                #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:
diff --git a/network/config/bond-with-vlans/controller-no-external.yaml b/network/config/bond-with-vlans/controller-no-external.yaml
index d9532439..6242e2f8 100644
--- a/network/config/bond-with-vlans/controller-no-external.yaml
+++ b/network/config/bond-with-vlans/controller-no-external.yaml
@@ -62,10 +62,17 @@ parameters:
     default: 60
     description: Vlan ID for the management network traffic.
     type: number
+  ControlPlaneDefaultRoute: # Override this via parameter_defaults
+    description: The default route of the control plane network.
+    type: string
   ExternalInterfaceDefaultRoute:
     default: '10.0.0.1'
     description: default route for the external network
     type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
   ControlPlaneSubnetCidr: # Override this via parameter_defaults
     default: '24'
     description: The subnet CIDR of the control plane network.
@@ -102,6 +109,9 @@ resources:
                 -
                   ip_netmask: 169.254.169.254/32
                   next_hop: {get_param: EC2MetadataIp}
+                -
+                  default: true
+                  next_hop: {get_param: ControlPlaneDefaultRoute}
             -
               type: ovs_bridge
               name: {get_input: bridge_name}
@@ -148,6 +158,8 @@ resources:
                   -
                     ip_netmask: {get_param: TenantIpSubnet}
                 # Uncomment when including environments/network-management.yaml
+                # If setting default route on the Management interface, comment
+                # out the default route on the Control Plane.
                 #-
                 #  type: vlan
                 #  device: bond1
@@ -155,6 +167,10 @@ resources:
                 #  addresses:
                 #    -
                 #      ip_netmask: {get_param: ManagementIpSubnet}
+                #  routes:
+                #    -
+                #      default: true
+                #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:
diff --git a/network/config/bond-with-vlans/controller-v6.yaml b/network/config/bond-with-vlans/controller-v6.yaml
index 7869ebfc..71b7e1b1 100644
--- a/network/config/bond-with-vlans/controller-v6.yaml
+++ b/network/config/bond-with-vlans/controller-v6.yaml
@@ -64,10 +64,6 @@ parameters:
     default: 60
     description: Vlan ID for the management network traffic.
     type: number
-  ExternalInterfaceDefaultRoute:
-    default: '10.0.0.1'
-    description: default route for the external network
-    type: string
   ControlPlaneSubnetCidr: # Override this via parameter_defaults
     default: '24'
     description: The subnet CIDR of the control plane network.
@@ -75,6 +71,14 @@ parameters:
   ControlPlaneDefaultRoute: # Override this via parameter_defaults
     description: The default route of the control plane network.
     type: string
+  ExternalInterfaceDefaultRoute:
+    default: '10.0.0.1'
+    description: default route for the external network
+    type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
   DnsServers: # Override this via parameter_defaults
     default: []
     description: A list of DNS servers (2 max for some implementations) that will be added to resolv.conf.
@@ -106,6 +110,7 @@ resources:
                 -
                   ip_netmask: 169.254.169.254/32
                   next_hop: {get_param: EC2MetadataIp}
+                # IPv4 Default Route
                 -
                   default: true
                   next_hop: {get_param: ControlPlaneDefaultRoute}
@@ -134,6 +139,7 @@ resources:
                     -
                       ip_netmask: {get_param: ExternalIpSubnet}
                   routes:
+                    # IPv6 Default Route
                     -
                       default: true
                       next_hop: {get_param: ExternalInterfaceDefaultRoute}
@@ -166,6 +172,9 @@ resources:
                     -
                       ip_netmask: {get_param: TenantIpSubnet}
                 # Uncomment when including environments/network-management.yaml
+                # If setting default route on the Management interface, comment
+                # out the default route on the External interface. This will
+                # make the External API unreachable from remote subnets.
                 #-
                 #  type: vlan
                 #  device: bond1
@@ -173,6 +182,10 @@ resources:
                 #  addresses:
                 #    -
                 #      ip_netmask: {get_param: ManagementIpSubnet}
+                #  routes:
+                #    -
+                #      default: true
+                #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:
diff --git a/network/config/bond-with-vlans/controller.yaml b/network/config/bond-with-vlans/controller.yaml
index d3627ead..9917f073 100644
--- a/network/config/bond-with-vlans/controller.yaml
+++ b/network/config/bond-with-vlans/controller.yaml
@@ -62,10 +62,17 @@ parameters:
     default: 60
     description: Vlan ID for the management network traffic.
     type: number
+  ControlPlaneDefaultRoute: # Override this via parameter_defaults
+    description: The default route of the control plane network.
+    type: string
   ExternalInterfaceDefaultRoute:
     default: '10.0.0.1'
     description: default route for the external network
     type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
   ControlPlaneSubnetCidr: # Override this via parameter_defaults
     default: '24'
     description: The subnet CIDR of the control plane network.
@@ -158,6 +165,9 @@ resources:
                     -
                       ip_netmask: {get_param: TenantIpSubnet}
                 # Uncomment when including environments/network-management.yaml
+                # If setting default route on the Management interface, comment
+                # out the default route on the External interface. This will
+                # make the External API unreachable from remote subnets.
                 #-
                 #  type: vlan
                 #  device: bond1
@@ -165,6 +175,10 @@ resources:
                 #  addresses:
                 #    -
                 #      ip_netmask: {get_param: ManagementIpSubnet}
+                #  routes:
+                #    -
+                #      default: true
+                #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:
diff --git a/network/config/bond-with-vlans/swift-storage.yaml b/network/config/bond-with-vlans/swift-storage.yaml
index de9121e5..4dd6628f 100644
--- a/network/config/bond-with-vlans/swift-storage.yaml
+++ b/network/config/bond-with-vlans/swift-storage.yaml
@@ -38,6 +38,10 @@ parameters:
     description: The ovs_options string for the bond interface. Set things like
                  lacp=active and/or bond_mode=balance-slb using this option.
     type: string
+  ExternalNetworkVlanID:
+    default: 10
+    description: Vlan ID for the external network traffic.
+    type: number
   InternalApiNetworkVlanID:
     default: 20
     description: Vlan ID for the internal_api network traffic.
@@ -50,6 +54,10 @@ parameters:
     default: 40
     description: Vlan ID for the storage mgmt network traffic.
     type: number
+  TenantNetworkVlanID:
+    default: 50
+    description: Vlan ID for the tenant network traffic.
+    type: number
   ManagementNetworkVlanID:
     default: 60
     description: Vlan ID for the management network traffic.
@@ -61,6 +69,14 @@ parameters:
   ControlPlaneDefaultRoute: # Override this via parameter_defaults
     description: The default route of the control plane network.
     type: string
+  ExternalInterfaceDefaultRoute: # Not used by default in this template
+    default: '10.0.0.1'
+    description: The default route of the external network.
+    type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
   DnsServers: # Override this via parameter_defaults
     default: []
     description: A list of DNS servers (2 max for some implementations) that will be added to resolv.conf.
@@ -134,6 +150,8 @@ resources:
                     -
                       ip_netmask: {get_param: StorageMgmtIpSubnet}
                 # Uncomment when including environments/network-management.yaml
+                # If setting default route on the Management interface, comment
+                # out the default route on the Control Plane.
                 #-
                 #  type: vlan
                 #  device: bond1
@@ -141,6 +159,10 @@ resources:
                 #  addresses:
                 #    -
                 #      ip_netmask: {get_param: ManagementIpSubnet}
+                #  routes:
+                #    -
+                #      default: true
+                #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:
diff --git a/network/config/multiple-nics/ceph-storage.yaml b/network/config/multiple-nics/ceph-storage.yaml
index 84cb0f12..c31c6e65 100644
--- a/network/config/multiple-nics/ceph-storage.yaml
+++ b/network/config/multiple-nics/ceph-storage.yaml
@@ -57,10 +57,6 @@ parameters:
     default: 60
     description: Vlan ID for the management network traffic.
     type: number
-  ExternalInterfaceDefaultRoute:
-    default: '10.0.0.1'
-    description: default route for the external network
-    type: string
   ControlPlaneSubnetCidr: # Override this via parameter_defaults
     default: '24'
     description: The subnet CIDR of the control plane network.
@@ -68,6 +64,14 @@ parameters:
   ControlPlaneDefaultRoute: # Override this via parameter_defaults
     description: The default route of the control plane network.
     type: string
+  ExternalInterfaceDefaultRoute: # Not used by default in this template
+    default: '10.0.0.1'
+    description: The default route of the external network.
+    type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
   DnsServers: # Override this via parameter_defaults
     default: []
     description: A list of DNS servers (2 max for some implementations) that will be added to resolv.conf.
@@ -118,6 +122,8 @@ resources:
                 -
                   ip_netmask: {get_param: StorageMgmtIpSubnet}
             # Uncomment when including environments/network-management.yaml
+            # If setting default route on the Management interface, comment
+            # out the default route on the Control Plane.
             #-
             #  type: interface
             #  name: nic7
@@ -125,6 +131,10 @@ resources:
             #  addresses:
             #    -
             #      ip_netmask: {get_param: ManagementIpSubnet}
+            #  routes:
+            #    -
+            #      default: true
+            #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:
diff --git a/network/config/multiple-nics/cinder-storage.yaml b/network/config/multiple-nics/cinder-storage.yaml
index 0b0218c5..4f8b7f64 100644
--- a/network/config/multiple-nics/cinder-storage.yaml
+++ b/network/config/multiple-nics/cinder-storage.yaml
@@ -57,10 +57,6 @@ parameters:
     default: 60
     description: Vlan ID for the management network traffic.
     type: number
-  ExternalInterfaceDefaultRoute:
-    default: '10.0.0.1'
-    description: default route for the external network
-    type: string
   ControlPlaneSubnetCidr: # Override this via parameter_defaults
     default: '24'
     description: The subnet CIDR of the control plane network.
@@ -68,6 +64,14 @@ parameters:
   ControlPlaneDefaultRoute: # Override this via parameter_defaults
     description: The default route of the control plane network.
     type: string
+  ExternalInterfaceDefaultRoute: # Not used by default in this template
+    default: '10.0.0.1'
+    description: The default route of the external network.
+    type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
   DnsServers: # Override this via parameter_defaults
     default: []
     description: A list of DNS servers (2 max for some implementations) that will be added to resolv.conf.
@@ -125,6 +129,8 @@ resources:
                 -
                   ip_netmask: {get_param: InternalApiIpSubnet}
             # Uncomment when including environments/network-management.yaml
+            # If setting default route on the Management interface, comment
+            # out the default route on the Control Plane.
             #-
             #  type: interface
             #  name: nic7
@@ -132,6 +138,10 @@ resources:
             #  addresses:
             #    -
             #      ip_netmask: {get_param: ManagementIpSubnet}
+            #  routes:
+            #    -
+            #      default: true
+            #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:
diff --git a/network/config/multiple-nics/compute.yaml b/network/config/multiple-nics/compute.yaml
index 97eef52b..77514745 100644
--- a/network/config/multiple-nics/compute.yaml
+++ b/network/config/multiple-nics/compute.yaml
@@ -57,10 +57,6 @@ parameters:
     default: 60
     description: Vlan ID for the management network traffic.
     type: number
-  ExternalInterfaceDefaultRoute:
-    default: '10.0.0.1'
-    description: default route for the external network
-    type: string
   ControlPlaneSubnetCidr: # Override this via parameter_defaults
     default: '24'
     description: The subnet CIDR of the control plane network.
@@ -68,6 +64,14 @@ parameters:
   ControlPlaneDefaultRoute: # Override this via parameter_defaults
     description: The default route of the control plane network.
     type: string
+  ExternalInterfaceDefaultRoute: # Not used by default in this template
+    default: '10.0.0.1'
+    description: The default route of the external network.
+    type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
   DnsServers: # Override this via parameter_defaults
     default: []
     description: A list of DNS servers (2 max for some implementations) that will be added to resolv.conf.
@@ -133,6 +137,8 @@ resources:
                   # force the MAC address of the bridge to this interface
                   primary: true
             # Uncomment when including environments/network-management.yaml
+            # If setting default route on the Management interface, comment
+            # out the default route on the Control Plane.
             #-
             #  type: interface
             #  name: nic7
@@ -140,6 +146,10 @@ resources:
             #  addresses:
             #    -
             #      ip_netmask: {get_param: ManagementIpSubnet}
+            #  routes:
+            #    -
+            #      default: true
+            #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:
diff --git a/network/config/multiple-nics/controller-v6.yaml b/network/config/multiple-nics/controller-v6.yaml
index b69879fb..da1f95f1 100644
--- a/network/config/multiple-nics/controller-v6.yaml
+++ b/network/config/multiple-nics/controller-v6.yaml
@@ -59,10 +59,6 @@ parameters:
     default: 60
     description: Vlan ID for the management network traffic.
     type: number
-  ExternalInterfaceDefaultRoute:
-    default: '10.0.0.1'
-    description: default route for the external network
-    type: string
   ControlPlaneSubnetCidr: # Override this via parameter_defaults
     default: '24'
     description: The subnet CIDR of the control plane network.
@@ -70,6 +66,14 @@ parameters:
   ControlPlaneDefaultRoute: # Override this via parameter_defaults
     description: The default route of the control plane network.
     type: string
+  ExternalInterfaceDefaultRoute:
+    default: '10.0.0.1'
+    description: default route for the external network
+    type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
   DnsServers: # Override this via parameter_defaults
     default: []
     description: A list of DNS servers (2 max for some implementations) that will be added to resolv.conf.
@@ -102,6 +106,7 @@ resources:
                 -
                   ip_netmask: 169.254.169.254/32
                   next_hop: {get_param: EC2MetadataIp}
+                # IPv4 Default Route
                 -
                   default: true
                   next_hop: {get_param: ControlPlaneDefaultRoute}
@@ -150,6 +155,7 @@ resources:
                 -
                   ip_netmask: {get_param: ExternalIpSubnet}
               routes:
+                # IPv6 Default Route
                 -
                   default: true
                   next_hop: {get_param: ExternalInterfaceDefaultRoute}
@@ -160,6 +166,9 @@ resources:
                   # force the MAC address of the bridge to this interface
                   primary: true
             # Uncomment when including environments/network-management.yaml
+            # If setting default route on the Management interface, comment
+            # out the default route on the External interface. This will
+            # make the External API unreachable from remote subnets.
             #-
             #  type: interface
             #  name: nic7
@@ -167,6 +176,10 @@ resources:
             #  addresses:
             #    -
             #      ip_netmask: {get_param: ManagementIpSubnet}
+            #  routes:
+            #    -
+            #      default: true
+            #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:
diff --git a/network/config/multiple-nics/controller.yaml b/network/config/multiple-nics/controller.yaml
index 377fd116..7a1f9e5f 100644
--- a/network/config/multiple-nics/controller.yaml
+++ b/network/config/multiple-nics/controller.yaml
@@ -57,10 +57,6 @@ parameters:
     default: 60
     description: Vlan ID for the management network traffic.
     type: number
-  ExternalInterfaceDefaultRoute:
-    default: '10.0.0.1'
-    description: default route for the external network
-    type: string
   ControlPlaneSubnetCidr: # Override this via parameter_defaults
     default: '24'
     description: The subnet CIDR of the control plane network.
@@ -68,6 +64,14 @@ parameters:
   ControlPlaneDefaultRoute: # Override this via parameter_defaults
     description: The default route of the control plane network.
     type: string
+  ExternalInterfaceDefaultRoute:
+    default: '10.0.0.1'
+    description: default route for the external network
+    type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
   DnsServers: # Override this via parameter_defaults
     default: []
     description: A list of DNS servers (2 max for some implementations) that will be added to resolv.conf.
@@ -155,6 +159,9 @@ resources:
                   # force the MAC address of the bridge to this interface
                   primary: true
             # Uncomment when including environments/network-management.yaml
+            # If setting default route on the Management interface, comment
+            # out the default route on the External interface. This will
+            # make the External API unreachable from remote subnets.
             #-
             #  type: interface
             #  name: nic7
@@ -162,6 +169,10 @@ resources:
             #  addresses:
             #    -
             #      ip_netmask: {get_param: ManagementIpSubnet}
+            #  routes:
+            #    -
+            #      default: true
+            #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:
diff --git a/network/config/multiple-nics/swift-storage.yaml b/network/config/multiple-nics/swift-storage.yaml
index b75bbd6e..05083105 100644
--- a/network/config/multiple-nics/swift-storage.yaml
+++ b/network/config/multiple-nics/swift-storage.yaml
@@ -57,10 +57,6 @@ parameters:
     default: 60
     description: Vlan ID for the management network traffic.
     type: number
-  ExternalInterfaceDefaultRoute:
-    default: '10.0.0.1'
-    description: default route for the external network
-    type: string
   ControlPlaneSubnetCidr: # Override this via parameter_defaults
     default: '24'
     description: The subnet CIDR of the control plane network.
@@ -68,6 +64,14 @@ parameters:
   ControlPlaneDefaultRoute: # Override this via parameter_defaults
     description: The default route of the control plane network.
     type: string
+  ExternalInterfaceDefaultRoute: # Not used by default in this template
+    default: '10.0.0.1'
+    description: The default route of the external network.
+    type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
   DnsServers: # Override this via parameter_defaults
     default: []
     description: A list of DNS servers (2 max for some implementations) that will be added to resolv.conf.
@@ -125,6 +129,8 @@ resources:
                 -
                   ip_netmask: {get_param: InternalApiIpSubnet}
             # Uncomment when including environments/network-management.yaml
+            # If setting default route on the Management interface, comment
+            # out the default route on the Control Plane.
             #-
             #  type: interface
             #  name: nic7
@@ -132,6 +138,10 @@ resources:
             #  addresses:
             #    -
             #      ip_netmask: {get_param: ManagementIpSubnet}
+            #  routes:
+            #    -
+            #      default: true
+            #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:
diff --git a/network/config/single-nic-linux-bridge-vlans/ceph-storage.yaml b/network/config/single-nic-linux-bridge-vlans/ceph-storage.yaml
index a46d7e20..fc8e8b6f 100644
--- a/network/config/single-nic-linux-bridge-vlans/ceph-storage.yaml
+++ b/network/config/single-nic-linux-bridge-vlans/ceph-storage.yaml
@@ -29,6 +29,18 @@ parameters:
     default: ''
     description: IP address/subnet on the tenant network
     type: string
+  ManagementIpSubnet: # Only populated when including environments/network-management.yaml
+    default: ''
+    description: IP address/subnet on the management network
+    type: string
+  ExternalNetworkVlanID:
+    default: 10
+    description: Vlan ID for the external network traffic.
+    type: number
+  InternalApiNetworkVlanID:
+    default: 20
+    description: Vlan ID for the internal_api network traffic.
+    type: number
   StorageNetworkVlanID:
     default: 30
     description: Vlan ID for the storage network traffic.
@@ -37,6 +49,14 @@ parameters:
     default: 40
     description: Vlan ID for the storage mgmt network traffic.
     type: number
+  TenantNetworkVlanID:
+    default: 50
+    description: Vlan ID for the tenant network traffic.
+    type: number
+  ManagementNetworkVlanID:
+    default: 60
+    description: Vlan ID for the management network traffic.
+    type: number
   ControlPlaneSubnetCidr: # Override this via parameter_defaults
     default: '24'
     description: The subnet CIDR of the control plane network.
@@ -44,6 +64,14 @@ parameters:
   ControlPlaneDefaultRoute: # Override this via parameter_defaults
     description: The default route of the control plane network.
     type: string
+  ExternalInterfaceDefaultRoute: # Not used by default in this template
+    default: '10.0.0.1'
+    description: The default route of the external network.
+    type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
   DnsServers: # Override this via parameter_defaults
     default: []
     description: A list of DNS servers (2 max for some implementations) that will be added to resolv.conf.
@@ -99,6 +127,20 @@ resources:
               addresses:
                 -
                   ip_netmask: {get_param: StorageMgmtIpSubnet}
+              # Uncomment when including environments/network-management.yaml
+              # If setting default route on the Management interface, comment
+              # out the default route on the Control Plane.
+              #-
+              #  type: vlan
+              #  vlan_id: {get_param: ManagementNetworkVlanID}
+              #  device: br-storage
+              #  addresses:
+              #    -
+              #      ip_netmask: {get_param: ManagementIpSubnet}
+              #  routes:
+              #    -
+              #      default: true
+              #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:
diff --git a/network/config/single-nic-linux-bridge-vlans/cinder-storage.yaml b/network/config/single-nic-linux-bridge-vlans/cinder-storage.yaml
index 08613a3b..6fb247ed 100644
--- a/network/config/single-nic-linux-bridge-vlans/cinder-storage.yaml
+++ b/network/config/single-nic-linux-bridge-vlans/cinder-storage.yaml
@@ -29,6 +29,14 @@ parameters:
     default: ''
     description: IP address/subnet on the tenant network
     type: string
+  ManagementIpSubnet: # Only populated when including environments/network-management.yaml
+    default: ''
+    description: IP address/subnet on the management network
+    type: string
+  ExternalNetworkVlanID:
+    default: 10
+    description: Vlan ID for the external network traffic.
+    type: number
   InternalApiNetworkVlanID:
     default: 20
     description: Vlan ID for the internal_api network traffic.
@@ -41,6 +49,14 @@ parameters:
     default: 40
     description: Vlan ID for the storage mgmt network traffic.
     type: number
+  TenantNetworkVlanID:
+    default: 50
+    description: Vlan ID for the tenant network traffic.
+    type: number
+  ManagementNetworkVlanID:
+    default: 60
+    description: Vlan ID for the management network traffic.
+    type: number
   ControlPlaneSubnetCidr: # Override this via parameter_defaults
     default: '24'
     description: The subnet CIDR of the control plane network.
@@ -48,6 +64,14 @@ parameters:
   ControlPlaneDefaultRoute: # Override this via parameter_defaults
     description: The default route of the control plane network.
     type: string
+  ExternalInterfaceDefaultRoute: # Not used by default in this template
+    default: '10.0.0.1'
+    description: The default route of the external network.
+    type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
   DnsServers: # Override this via parameter_defaults
     default: []
     description: A list of DNS servers (2 max for some implementations) that will be added to resolv.conf.
@@ -110,6 +134,20 @@ resources:
               addresses:
                 -
                   ip_netmask: {get_param: StorageMgmtIpSubnet}
+              # Uncomment when including environments/network-management.yaml
+              # If setting default route on the Management interface, comment
+              # out the default route on the Control Plane.
+              #-
+              #  type: vlan
+              #  vlan_id: {get_param: ManagementNetworkVlanID}
+              #  device: br-storage
+              #  addresses:
+              #    -
+              #      ip_netmask: {get_param: ManagementIpSubnet}
+              #  routes:
+              #    -
+              #      default: true
+              #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:
diff --git a/network/config/single-nic-linux-bridge-vlans/compute.yaml b/network/config/single-nic-linux-bridge-vlans/compute.yaml
index b6522c67..e31720d8 100644
--- a/network/config/single-nic-linux-bridge-vlans/compute.yaml
+++ b/network/config/single-nic-linux-bridge-vlans/compute.yaml
@@ -29,6 +29,14 @@ parameters:
     default: ''
     description: IP address/subnet on the tenant network
     type: string
+  ManagementIpSubnet: # Only populated when including environments/network-management.yaml
+    default: ''
+    description: IP address/subnet on the management network
+    type: string
+  ExternalNetworkVlanID:
+    default: 10
+    description: Vlan ID for the external network traffic.
+    type: number
   InternalApiNetworkVlanID:
     default: 20
     description: Vlan ID for the internal_api network traffic.
@@ -37,10 +45,18 @@ parameters:
     default: 30
     description: Vlan ID for the storage network traffic.
     type: number
+  StorageMgmtNetworkVlanID:
+    default: 40
+    description: Vlan ID for the storage mgmt network traffic.
+    type: number
   TenantNetworkVlanID:
     default: 50
     description: Vlan ID for the tenant network traffic.
     type: number
+  ManagementNetworkVlanID:
+    default: 60
+    description: Vlan ID for the management network traffic.
+    type: number
   ControlPlaneSubnetCidr: # Override this via parameter_defaults
     default: '24'
     description: The subnet CIDR of the control plane network.
@@ -48,6 +64,14 @@ parameters:
   ControlPlaneDefaultRoute: # Override this via parameter_defaults
     description: The default route of the control plane network.
     type: string
+  ExternalInterfaceDefaultRoute: # Not used by default in this template
+    default: '10.0.0.1'
+    description: The default route of the external network.
+    type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
   DnsServers: # Override this via parameter_defaults
     default: []
     description: A list of DNS servers (2 max for some implementations) that will be added to resolv.conf.
@@ -81,7 +105,6 @@ resources:
                   ip_netmask: 169.254.169.254/32
                   next_hop: {get_param: EC2MetadataIp}
                 -
-                  ip_netmask: 0.0.0.0/0
                   default: true
                   next_hop: {get_param: ControlPlaneDefaultRoute}
               members:
@@ -111,6 +134,20 @@ resources:
               addresses:
                 -
                   ip_netmask: {get_param: TenantIpSubnet}
+              # Uncomment when including environments/network-management.yaml
+              # If setting default route on the Management interface, comment
+              # out the default route on the Control Plane.
+              #-
+              #  type: vlan
+              #  vlan_id: {get_param: ManagementNetworkVlanID}
+              #  device: {get_input: bridge_name}
+              #  addresses:
+              #    -
+              #      ip_netmask: {get_param: ManagementIpSubnet}
+              #  routes:
+              #    -
+              #      default: true
+              #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:
diff --git a/network/config/single-nic-linux-bridge-vlans/controller-v6.yaml b/network/config/single-nic-linux-bridge-vlans/controller-v6.yaml
new file mode 100644
index 00000000..80125149
--- /dev/null
+++ b/network/config/single-nic-linux-bridge-vlans/controller-v6.yaml
@@ -0,0 +1,178 @@
+heat_template_version: 2015-04-30
+
+description: >
+  Software Config to drive os-net-config to configure VLANs for the
+  controller role with IPv6 on the External network. The IPv6 default
+  route is on the External network, and the IPv4 default route is on
+  the Control Plane.
+
+parameters:
+  ControlPlaneIp:
+    default: ''
+    description: IP address/subnet on the ctlplane network
+    type: string
+  ExternalIpSubnet:
+    default: ''
+    description: IP address/subnet on the external network
+    type: string
+  InternalApiIpSubnet:
+    default: ''
+    description: IP address/subnet on the internal API network
+    type: string
+  StorageIpSubnet:
+    default: ''
+    description: IP address/subnet on the storage network
+    type: string
+  StorageMgmtIpSubnet:
+    default: ''
+    description: IP address/subnet on the storage mgmt network
+    type: string
+  TenantIpSubnet:
+    default: ''
+    description: IP address/subnet on the tenant network
+    type: string
+  ManagementIpSubnet: # Only populated when including environments/network-management.yaml
+    default: ''
+    description: IP address/subnet on the management network
+    type: string
+  ExternalNetworkVlanID:
+    default: 10
+    description: Vlan ID for the external network traffic.
+    type: number
+  InternalApiNetworkVlanID:
+    default: 20
+    description: Vlan ID for the internal_api network traffic.
+    type: number
+  StorageNetworkVlanID:
+    default: 30
+    description: Vlan ID for the storage network traffic.
+    type: number
+  StorageMgmtNetworkVlanID:
+    default: 40
+    description: Vlan ID for the storage mgmt network traffic.
+    type: number
+  TenantNetworkVlanID:
+    default: 50
+    description: Vlan ID for the tenant network traffic.
+    type: number
+  ManagementNetworkVlanID:
+    default: 60
+    description: Vlan ID for the management network traffic.
+    type: number
+  ControlPlaneDefaultRoute: # Override this via parameter_defaults
+    description: The default route of the control plane network.
+    type: string
+  ExternalInterfaceDefaultRoute:
+    default: '10.0.0.1'
+    description: default route for the external network
+    type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
+  ControlPlaneSubnetCidr: # Override this via parameter_defaults
+    default: '24'
+    description: The subnet CIDR of the control plane network.
+    type: string
+  DnsServers: # Override this via parameter_defaults
+    default: []
+    description: A list of DNS servers (2 max for some implementations) that will be added to resolv.conf.
+    type: comma_delimited_list
+  EC2MetadataIp: # Override this via parameter_defaults
+    description: The IP address of the EC2 metadata server.
+    type: string
+
+resources:
+  OsNetConfigImpl:
+    type: OS::Heat::StructuredConfig
+    properties:
+      group: os-apply-config
+      config:
+        os_net_config:
+          network_config:
+            -
+              type: linux_bridge
+              name: {get_input: bridge_name}
+              use_dhcp: false
+              dns_servers: {get_param: DnsServers}
+              addresses:
+                -
+                  ip_netmask:
+                    list_join:
+                      - '/'
+                      - - {get_param: ControlPlaneIp}
+                        - {get_param: ControlPlaneSubnetCidr}
+              routes:
+                -
+                  ip_netmask: 169.254.169.254/32
+                  next_hop: {get_param: EC2MetadataIp}
+                # IPv4 Default Route
+                -
+                  default: true
+                  next_hop: {get_param: ControlPlaneDefaultRoute}
+              members:
+                -
+                  type: interface
+                  name: {get_input: interface_name}
+                  # force the MAC address of the bridge to this interface
+                  primary: true
+            -
+              type: vlan
+              vlan_id: {get_param: ExternalNetworkVlanID}
+              device: {get_input: bridge_name}
+              addresses:
+                -
+                  ip_netmask: {get_param: ExternalIpSubnet}
+              routes:
+                # IPv6 Default Route
+                -
+                  default: true
+                  next_hop: {get_param: ExternalInterfaceDefaultRoute}
+            -
+              type: vlan
+              vlan_id: {get_param: InternalApiNetworkVlanID}
+              device: {get_input: bridge_name}
+              addresses:
+                -
+                  ip_netmask: {get_param: InternalApiIpSubnet}
+            -
+              type: vlan
+              vlan_id: {get_param: StorageNetworkVlanID}
+              device: {get_input: bridge_name}
+              addresses:
+                -
+                  ip_netmask: {get_param: StorageIpSubnet}
+            -
+              type: vlan
+              vlan_id: {get_param: StorageMgmtNetworkVlanID}
+              device: {get_input: bridge_name}
+              addresses:
+                -
+                  ip_netmask: {get_param: StorageMgmtIpSubnet}
+            -
+              type: vlan
+              vlan_id: {get_param: TenantNetworkVlanID}
+              device: {get_input: bridge_name}
+              addresses:
+                -
+                  ip_netmask: {get_param: TenantIpSubnet}
+              # Uncomment when including environments/network-management.yaml
+              # If setting default route on the Management interface, comment
+              # out the default route on the External interface. This will
+              # make the External API unreachable from remote subnets.
+              #-
+              #  type: vlan
+              #  vlan_id: {get_param: ManagementNetworkVlanID}
+              #  device: {get_input: bridge_name}
+              #  addresses:
+              #    -
+              #      ip_netmask: {get_param: ManagementIpSubnet}
+              #  routes:
+              #    -
+              #      default: true
+              #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
+
+outputs:
+  OS::stack_id:
+    description: The OsNetConfigImpl resource.
+    value: {get_resource: OsNetConfigImpl}
diff --git a/network/config/single-nic-linux-bridge-vlans/controller.yaml b/network/config/single-nic-linux-bridge-vlans/controller.yaml
index 72105481..aef5d4e3 100644
--- a/network/config/single-nic-linux-bridge-vlans/controller.yaml
+++ b/network/config/single-nic-linux-bridge-vlans/controller.yaml
@@ -29,6 +29,10 @@ parameters:
     default: ''
     description: IP address/subnet on the tenant network
     type: string
+  ManagementIpSubnet: # Only populated when including environments/network-management.yaml
+    default: ''
+    description: IP address/subnet on the management network
+    type: string
   ExternalNetworkVlanID:
     default: 10
     description: Vlan ID for the external network traffic.
@@ -49,10 +53,21 @@ parameters:
     default: 50
     description: Vlan ID for the tenant network traffic.
     type: number
+  ManagementNetworkVlanID:
+    default: 60
+    description: Vlan ID for the management network traffic.
+    type: number
+  ControlPlaneDefaultRoute: # Override this via parameter_defaults
+    description: The default route of the control plane network.
+    type: string
   ExternalInterfaceDefaultRoute:
     default: '10.0.0.1'
     description: default route for the external network
     type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
   ControlPlaneSubnetCidr: # Override this via parameter_defaults
     default: '24'
     description: The subnet CIDR of the control plane network.
@@ -64,9 +79,6 @@ parameters:
   EC2MetadataIp: # Override this via parameter_defaults
     description: The IP address of the EC2 metadata server.
     type: string
-  ControlPlaneDefaultRoute: # Override this via parameter_defaults
-    description: The default route of the control plane network.
-    type: string
 
 resources:
   OsNetConfigImpl:
@@ -92,8 +104,8 @@ resources:
                 -
                   ip_netmask: 169.254.169.254/32
                   next_hop: {get_param: EC2MetadataIp}
+                # IPv4 Default Route
                 -
-                  ip_netmask: 0.0.0.0/0
                   default: true
                   next_hop: {get_param: ControlPlaneDefaultRoute}
               members:
@@ -110,8 +122,8 @@ resources:
                 -
                   ip_netmask: {get_param: ExternalIpSubnet}
               routes:
+                # IPv6 Default Route
                 -
-                  ip_netmask: 0.0.0.0/0
                   default: true
                   next_hop: {get_param: ExternalInterfaceDefaultRoute}
             -
@@ -142,6 +154,21 @@ resources:
               addresses:
                 -
                   ip_netmask: {get_param: TenantIpSubnet}
+              # Uncomment when including environments/network-management.yaml
+              # If setting default route on the Management interface, comment
+              # out the default route on the External interface. This will
+              # make the External API unreachable from remote subnets.
+              #-
+              #  type: vlan
+              #  vlan_id: {get_param: ManagementNetworkVlanID}
+              #  device: {get_input: bridge_name}
+              #  addresses:
+              #    -
+              #      ip_netmask: {get_param: ManagementIpSubnet}
+              #  routes:
+              #    -
+              #      default: true
+              #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:
diff --git a/network/config/single-nic-linux-bridge-vlans/swift-storage.yaml b/network/config/single-nic-linux-bridge-vlans/swift-storage.yaml
index 962b9890..a5d2f966 100644
--- a/network/config/single-nic-linux-bridge-vlans/swift-storage.yaml
+++ b/network/config/single-nic-linux-bridge-vlans/swift-storage.yaml
@@ -29,6 +29,14 @@ parameters:
     default: ''
     description: IP address/subnet on the tenant network
     type: string
+  ManagementIpSubnet: # Only populated when including environments/network-management.yaml
+    default: ''
+    description: IP address/subnet on the management network
+    type: string
+  ExternalNetworkVlanID:
+    default: 10
+    description: Vlan ID for the external network traffic.
+    type: number
   InternalApiNetworkVlanID:
     default: 20
     description: Vlan ID for the internal_api network traffic.
@@ -41,6 +49,14 @@ parameters:
     default: 40
     description: Vlan ID for the storage mgmt network traffic.
     type: number
+  TenantNetworkVlanID:
+    default: 50
+    description: Vlan ID for the tenant network traffic.
+    type: number
+  ManagementNetworkVlanID:
+    default: 60
+    description: Vlan ID for the management network traffic.
+    type: number
   ControlPlaneSubnetCidr: # Override this via parameter_defaults
     default: '24'
     description: The subnet CIDR of the control plane network.
@@ -48,6 +64,14 @@ parameters:
   ControlPlaneDefaultRoute: # Override this via parameter_defaults
     description: The default route of the control plane network.
     type: string
+  ExternalInterfaceDefaultRoute: # Not used by default in this template
+    default: '10.0.0.1'
+    description: The default route of the external network.
+    type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
   DnsServers: # Override this via parameter_defaults
     default: []
     description: A list of DNS servers (2 max for some implementations) that will be added to resolv.conf.
@@ -110,6 +134,20 @@ resources:
               addresses:
                 -
                   ip_netmask: {get_param: StorageMgmtIpSubnet}
+              # Uncomment when including environments/network-management.yaml
+              # If setting default route on the Management interface, comment
+              # out the default route on the Control Plane.
+              #-
+              #  type: vlan
+              #  vlan_id: {get_param: ManagementNetworkVlanID}
+              #  device: br-storage
+              #  addresses:
+              #    -
+              #      ip_netmask: {get_param: ManagementIpSubnet}
+              #  routes:
+              #    -
+              #      default: true
+              #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:
diff --git a/network/config/single-nic-vlans/ceph-storage.yaml b/network/config/single-nic-vlans/ceph-storage.yaml
index 80bc32d3..6fa288af 100644
--- a/network/config/single-nic-vlans/ceph-storage.yaml
+++ b/network/config/single-nic-vlans/ceph-storage.yaml
@@ -52,6 +52,14 @@ parameters:
   ControlPlaneDefaultRoute: # Override this via parameter_defaults
     description: The default route of the control plane network.
     type: string
+  ExternalInterfaceDefaultRoute: # Not used by default in this template
+    default: '10.0.0.1'
+    description: The default route of the external network.
+    type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
   DnsServers: # Override this via parameter_defaults
     default: []
     description: A list of DNS servers (2 max for some implementations) that will be added to resolv.conf.
@@ -106,12 +114,18 @@ resources:
                     -
                       ip_netmask: {get_param: StorageMgmtIpSubnet}
                 # Uncomment when including environments/network-management.yaml
+                # If setting default route on the Management interface, comment
+                # out the default route on the Control Plane.
                 #-
                 #  type: vlan
                 #  vlan_id: {get_param: ManagementNetworkVlanID}
                 #  addresses:
                 #    -
                 #      ip_netmask: {get_param: ManagementIpSubnet}
+                #  routes:
+                #    -
+                #      default: true
+                #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:
diff --git a/network/config/single-nic-vlans/cinder-storage.yaml b/network/config/single-nic-vlans/cinder-storage.yaml
index e509443a..d1135776 100644
--- a/network/config/single-nic-vlans/cinder-storage.yaml
+++ b/network/config/single-nic-vlans/cinder-storage.yaml
@@ -56,6 +56,14 @@ parameters:
   ControlPlaneDefaultRoute: # Override this via parameter_defaults
     description: The default route of the control plane network.
     type: string
+  ExternalInterfaceDefaultRoute: # Not used by default in this template
+    default: '10.0.0.1'
+    description: The default route of the external network.
+    type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
   DnsServers: # Override this via parameter_defaults
     default: []
     description: A list of DNS servers (2 max for some implementations) that will be added to resolv.conf.
@@ -116,12 +124,18 @@ resources:
                     -
                       ip_netmask: {get_param: StorageMgmtIpSubnet}
                 # Uncomment when including environments/network-management.yaml
+                # If setting default route on the Management interface, comment
+                # out the default route on the Control Plane.
                 #-
                 #  type: vlan
                 #  vlan_id: {get_param: ManagementNetworkVlanID}
                 #  addresses:
                 #    -
                 #      ip_netmask: {get_param: ManagementIpSubnet}
+                #  routes:
+                #    -
+                #      default: true
+                #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:
diff --git a/network/config/single-nic-vlans/compute.yaml b/network/config/single-nic-vlans/compute.yaml
index 8cf6825d..bd3cef34 100644
--- a/network/config/single-nic-vlans/compute.yaml
+++ b/network/config/single-nic-vlans/compute.yaml
@@ -56,6 +56,14 @@ parameters:
   ControlPlaneDefaultRoute: # Override this via parameter_defaults
     description: The default route of the control plane network.
     type: string
+  ExternalInterfaceDefaultRoute: # Not used by default in this template
+    default: '10.0.0.1'
+    description: The default route of the external network.
+    type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
   DnsServers: # Override this via parameter_defaults
     default: []
     description: A list of DNS servers (2 max for some implementations) that will be added to resolv.conf.
@@ -116,12 +124,18 @@ resources:
                     -
                       ip_netmask: {get_param: TenantIpSubnet}
                 # Uncomment when including environments/network-management.yaml
+                # If setting default route on the Management interface, comment
+                # out the default route on the Control Plane.
                 #-
                 #  type: vlan
                 #  vlan_id: {get_param: ManagementNetworkVlanID}
                 #  addresses:
                 #    -
                 #      ip_netmask: {get_param: ManagementIpSubnet}
+                #  routes:
+                #    -
+                #      default: true
+                #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:
diff --git a/network/config/single-nic-vlans/controller-no-external.yaml b/network/config/single-nic-vlans/controller-no-external.yaml
index eb5e1e5a..8e8b0f5d 100644
--- a/network/config/single-nic-vlans/controller-no-external.yaml
+++ b/network/config/single-nic-vlans/controller-no-external.yaml
@@ -5,6 +5,10 @@ description: >
   controller role. No external IP is configured.
 
 parameters:
+  ControlPlaneIp:
+    default: ''
+    description: IP address/subnet on the ctlplane network
+    type: string
   ExternalIpSubnet:
     default: ''
     description: IP address/subnet on the external network
@@ -53,10 +57,28 @@ parameters:
     default: 60
     description: Vlan ID for the management network traffic.
     type: number
+  ControlPlaneDefaultRoute: # Override this via parameter_defaults
+    description: The default route of the control plane network.
+    type: string
   ExternalInterfaceDefaultRoute:
     default: '10.0.0.1'
     description: default route for the external network
     type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
+  ControlPlaneSubnetCidr: # Override this via parameter_defaults
+    default: '24'
+    description: The subnet CIDR of the control plane network.
+    type: string
+  DnsServers: # Override this via parameter_defaults
+    default: []
+    description: A list of DNS servers (2 max for some implementations) that will be added to resolv.conf.
+    type: comma_delimited_list
+  EC2MetadataIp: # Override this via parameter_defaults
+    description: The IP address of the EC2 metadata server.
+    type: string
 
 resources:
   OsNetConfigImpl:
@@ -69,7 +91,22 @@ resources:
             -
               type: ovs_bridge
               name: {get_input: bridge_name}
-              use_dhcp: true
+              use_dhcp: false
+              dns_servers: {get_param: DnsServers}
+              addresses:
+                -
+                  ip_netmask:
+                    list_join:
+                      - '/'
+                      - - {get_param: ControlPlaneIp}
+                        - {get_param: ControlPlaneSubnetCidr}
+              routes:
+                -
+                  ip_netmask: 169.254.169.254/32
+                  next_hop: {get_param: EC2MetadataIp}
+                -
+                  default: true
+                  next_hop: {get_param: ControlPlaneDefaultRoute}
               members:
                 -
                   type: interface
@@ -101,12 +138,18 @@ resources:
                   -
                     ip_netmask: {get_param: TenantIpSubnet}
                 # Uncomment when including environments/network-management.yaml
+                # If setting default route on the Management interface, comment
+                # out the default route on the Control Plane.
                 #-
                 #  type: vlan
                 #  vlan_id: {get_param: ManagementNetworkVlanID}
                 #  addresses:
                 #    -
                 #      ip_netmask: {get_param: ManagementIpSubnet}
+                #  routes:
+                #    -
+                #      default: true
+                #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:
diff --git a/network/config/single-nic-vlans/controller-v6.yaml b/network/config/single-nic-vlans/controller-v6.yaml
index 472e539d..ecbf2efb 100644
--- a/network/config/single-nic-vlans/controller-v6.yaml
+++ b/network/config/single-nic-vlans/controller-v6.yaml
@@ -59,10 +59,6 @@ parameters:
     default: 60
     description: Vlan ID for the management network traffic.
     type: number
-  ExternalInterfaceDefaultRoute:
-    default: '10.0.0.1'
-    description: default route for the external network
-    type: string
   ControlPlaneSubnetCidr: # Override this via parameter_defaults
     default: '24'
     description: The subnet CIDR of the control plane network.
@@ -70,6 +66,14 @@ parameters:
   ControlPlaneDefaultRoute: # Override this via parameter_defaults
     description: The default route of the control plane network.
     type: string
+  ExternalInterfaceDefaultRoute:
+    default: '10.0.0.1'
+    description: default route for the external network
+    type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
   DnsServers: # Override this via parameter_defaults
     default: []
     description: A list of DNS servers (2 max for some implementations) that will be added to resolv.conf.
@@ -102,6 +106,7 @@ resources:
                 -
                   ip_netmask: 169.254.169.254/32
                   next_hop: {get_param: EC2MetadataIp}
+                # IPv4 Default Route
                 -
                   default: true
                   next_hop: {get_param: ControlPlaneDefaultRoute}
@@ -115,9 +120,10 @@ resources:
                   type: vlan
                   vlan_id: {get_param: ExternalNetworkVlanID}
                   addresses:
-                  -
-                    ip_netmask: {get_param: ExternalIpSubnet}
+                    -
+                      ip_netmask: {get_param: ExternalIpSubnet}
                   routes:
+                    # IPv6 Default Route
                     -
                       default: true
                       next_hop: {get_param: ExternalInterfaceDefaultRoute}
@@ -145,12 +151,20 @@ resources:
                   addresses:
                     -
                       ip_netmask: {get_param: TenantIpSubnet}
-                #-  # Uncomment when including environments/network-management.yaml
+                # Uncomment when including environments/network-management.yaml
+                # If setting default route on the Management interface, comment
+                # out the default route on the External interface. This will
+                # make the External API unreachable from remote subnets.
+                #-
                 #  type: vlan
                 #  vlan_id: {get_param: ManagementNetworkVlanID}
                 #  addresses:
                 #    -
                 #      ip_netmask: {get_param: ManagementIpSubnet}
+                #  routes:
+                #    -
+                #      default: true
+                #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:
diff --git a/network/config/single-nic-vlans/controller.yaml b/network/config/single-nic-vlans/controller.yaml
index a5a0745d..c5979a89 100644
--- a/network/config/single-nic-vlans/controller.yaml
+++ b/network/config/single-nic-vlans/controller.yaml
@@ -57,10 +57,17 @@ parameters:
     default: 60
     description: Vlan ID for the management network traffic.
     type: number
+  ControlPlaneDefaultRoute: # Override this via parameter_defaults
+    description: The default route of the control plane network.
+    type: string
   ExternalInterfaceDefaultRoute:
     default: '10.0.0.1'
     description: default route for the external network
     type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
   ControlPlaneSubnetCidr: # Override this via parameter_defaults
     default: '24'
     description: The subnet CIDR of the control plane network.
@@ -137,12 +144,20 @@ resources:
                   addresses:
                     -
                       ip_netmask: {get_param: TenantIpSubnet}
-                #-  # Uncomment when including environments/network-management.yaml
+                # Uncomment when including environments/network-management.yaml
+                # If setting default route on the Management interface, comment
+                # out the default route on the External interface. This will
+                # make the External API unreachable from remote subnets.
+                #-
                 #  type: vlan
                 #  vlan_id: {get_param: ManagementNetworkVlanID}
                 #  addresses:
                 #    -
                 #      ip_netmask: {get_param: ManagementIpSubnet}
+                #  routes:
+                #    -
+                #      default: true
+                #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id:
diff --git a/network/config/single-nic-vlans/swift-storage.yaml b/network/config/single-nic-vlans/swift-storage.yaml
index efc03393..7b06580c 100644
--- a/network/config/single-nic-vlans/swift-storage.yaml
+++ b/network/config/single-nic-vlans/swift-storage.yaml
@@ -56,6 +56,14 @@ parameters:
   ControlPlaneDefaultRoute: # Override this via parameter_defaults
     description: The default route of the control plane network.
     type: string
+  ExternalInterfaceDefaultRoute: # Not used by default in this template
+    default: '10.0.0.1'
+    description: The default route of the external network.
+    type: string
+  ManagementInterfaceDefaultRoute: # Commented out by default in this template
+    default: unset
+    description: The default route of the management network.
+    type: string
   DnsServers: # Override this via parameter_defaults
     default: []
     description: A list of DNS servers (2 max for some implementations) that will be added to resolv.conf.
@@ -116,12 +124,18 @@ resources:
                     -
                       ip_netmask: {get_param: StorageMgmtIpSubnet}
                 # Uncomment when including environments/network-management.yaml
+                # If setting default route on the Management interface, comment
+                # out the default route on the Control Plane.
                 #-
                 #  type: vlan
                 #  vlan_id: {get_param: ManagementNetworkVlanID}
                 #  addresses:
                 #    -
                 #      ip_netmask: {get_param: ManagementIpSubnet}
+                #  routes:
+                #    -
+                #      default: true
+                #      next_hop: {get_param: ManagementInterfaceDefaultRoute}
 
 outputs:
   OS::stack_id: