| #!/bin/bash | 
 | # Subnet IP version | 
 | IP_VERSION=${IP_VERSION:-"4+6"} | 
 | # Validate IP_VERSION | 
 | if [[ $IP_VERSION != "4" ]] && [[ $IP_VERSION != "6" ]] && [[ $IP_VERSION != "4+6" ]]; then | 
 |     die $LINENO "IP_VERSION must be either 4, 6, or 4+6" | 
 | fi | 
 | # Specify if the initial private and external networks should be created | 
 | NEUTRON_CREATE_INITIAL_NETWORKS=${NEUTRON_CREATE_INITIAL_NETWORKS:-True} | 
 |  | 
 | ## Provider Network Information | 
 | PROVIDER_SUBNET_NAME=${PROVIDER_SUBNET_NAME:-"provider_net"} | 
 | IPV6_PROVIDER_SUBNET_NAME=${IPV6_PROVIDER_SUBNET_NAME:-"provider_net_v6"} | 
 | IPV6_PROVIDER_FIXED_RANGE=${IPV6_PROVIDER_FIXED_RANGE:-} | 
 | IPV6_PROVIDER_NETWORK_GATEWAY=${IPV6_PROVIDER_NETWORK_GATEWAY:-} | 
 |  | 
 | PUBLIC_BRIDGE=${PUBLIC_BRIDGE:-br-ex} | 
 | PUBLIC_BRIDGE_MTU=${PUBLIC_BRIDGE_MTU:-1500} | 
 |  | 
 | # If Q_ASSIGN_GATEWAY_TO_PUBLIC_BRIDGE=True, assign the gateway IP of the public | 
 | # subnet to the public bridge interface even if Q_USE_PROVIDERNET_FOR_PUBLIC is | 
 | # used. | 
 | Q_ASSIGN_GATEWAY_TO_PUBLIC_BRIDGE=${Q_ASSIGN_GATEWAY_TO_PUBLIC_BRIDGE:-True} | 
 |  | 
 | # The name of the default router | 
 | Q_ROUTER_NAME=${Q_ROUTER_NAME:-router1} | 
 |  | 
 | # If Q_USE_PUBLIC_VETH=True, create and use a veth pair instead of | 
 | # PUBLIC_BRIDGE.  This is intended to be used with | 
 | # Q_USE_PROVIDERNET_FOR_PUBLIC=True. | 
 | Q_USE_PUBLIC_VETH=${Q_USE_PUBLIC_VETH:-False} | 
 | Q_PUBLIC_VETH_EX=${Q_PUBLIC_VETH_EX:-veth-pub-ex} | 
 | Q_PUBLIC_VETH_INT=${Q_PUBLIC_VETH_INT:-veth-pub-int} | 
 |  | 
 | # The next variable is configured by plugin | 
 | # e.g.  _configure_neutron_l3_agent or lib/neutron_plugins/* | 
 | # | 
 | # L3 routers exist per tenant | 
 | Q_L3_ROUTER_PER_TENANT=${Q_L3_ROUTER_PER_TENANT:-True} | 
 |  | 
 |  | 
 | # Use flat providernet for public network | 
 | # | 
 | # If Q_USE_PROVIDERNET_FOR_PUBLIC=True, use a flat provider network | 
 | # for external interface of neutron l3-agent.  In that case, | 
 | # PUBLIC_PHYSICAL_NETWORK specifies provider:physical_network value | 
 | # used for the network.  In case of ofagent, you should add the | 
 | # corresponding entry to your OFAGENT_PHYSICAL_INTERFACE_MAPPINGS. | 
 | # For openvswitch agent, you should add the corresponding entry to | 
 | # your OVS_BRIDGE_MAPPINGS. | 
 | # | 
 | # eg.  (ofagent) | 
 | #    Q_USE_PROVIDERNET_FOR_PUBLIC=True | 
 | #    Q_USE_PUBLIC_VETH=True | 
 | #    PUBLIC_PHYSICAL_NETWORK=public | 
 | #    OFAGENT_PHYSICAL_INTERFACE_MAPPINGS=public:veth-pub-int | 
 | # | 
 | # eg.  (openvswitch agent) | 
 | #    Q_USE_PROVIDERNET_FOR_PUBLIC=True | 
 | #    PUBLIC_PHYSICAL_NETWORK=public | 
 | #    OVS_BRIDGE_MAPPINGS=public:br-ex | 
 | Q_USE_PROVIDERNET_FOR_PUBLIC=${Q_USE_PROVIDERNET_FOR_PUBLIC:-True} | 
 | PUBLIC_PHYSICAL_NETWORK=${PUBLIC_PHYSICAL_NETWORK:-public} | 
 |  | 
 | # Generate 40-bit IPv6 Global ID to comply with RFC 4193 | 
 | IPV6_GLOBAL_ID=`uuidgen | sed s/-//g | cut -c 23- | sed -e "s/\(..\)\(....\)\(....\)/\1:\2:\3/"` | 
 |  | 
 | # IPv6 gateway and subnet defaults, in case they are not customized in localrc | 
 | IPV6_RA_MODE=${IPV6_RA_MODE:-slaac} | 
 | IPV6_ADDRESS_MODE=${IPV6_ADDRESS_MODE:-slaac} | 
 | IPV6_PUBLIC_SUBNET_NAME=${IPV6_PUBLIC_SUBNET_NAME:-ipv6-public-subnet} | 
 | IPV6_PRIVATE_SUBNET_NAME=${IPV6_PRIVATE_SUBNET_NAME:-ipv6-private-subnet} | 
 | IPV6_ADDRS_SAFE_TO_USE=${IPV6_ADDRS_SAFE_TO_USE:-fd$IPV6_GLOBAL_ID::/56} | 
 | # if we got larger than a /64 safe to use, we only use the first /64 to | 
 | # avoid side effects outlined in rfc7421 | 
 | FIXED_RANGE_V6=${FIXED_RANGE_V6:-$(echo $IPV6_ADDRS_SAFE_TO_USE | awk -F '/' '{ print $1"/"($2>63 ? $2 : 64) }')} | 
 | IPV6_PRIVATE_NETWORK_GATEWAY=${IPV6_PRIVATE_NETWORK_GATEWAY:-} | 
 | IPV6_PUBLIC_RANGE=${IPV6_PUBLIC_RANGE:-2001:db8::/64} | 
 | IPV6_PUBLIC_NETWORK_GATEWAY=${IPV6_PUBLIC_NETWORK_GATEWAY:-2001:db8::2} | 
 | IPV6_ROUTER_GW_IP=${IPV6_ROUTER_GW_IP:-2001:db8::1} | 
 |  | 
 | # Gateway and subnet defaults, in case they are not customized in localrc | 
 | NETWORK_GATEWAY=${NETWORK_GATEWAY:-} | 
 | PUBLIC_NETWORK_GATEWAY=${PUBLIC_NETWORK_GATEWAY:-} | 
 | PRIVATE_SUBNET_NAME=${PRIVATE_SUBNET_NAME:-"private-subnet"} | 
 | PUBLIC_SUBNET_NAME=${PUBLIC_SUBNET_NAME:-"public-subnet"} | 
 |  | 
 | # Subnetpool defaults | 
 | USE_SUBNETPOOL=${USE_SUBNETPOOL:-True} | 
 | SUBNETPOOL_NAME=${SUBNETPOOL_NAME:-"shared-default-subnetpool"} | 
 |  | 
 | SUBNETPOOL_PREFIX_V4=${SUBNETPOOL_PREFIX_V4:-$IPV4_ADDRS_SAFE_TO_USE} | 
 | SUBNETPOOL_PREFIX_V6=${SUBNETPOOL_PREFIX_V6:-$IPV6_ADDRS_SAFE_TO_USE} | 
 |  | 
 | SUBNETPOOL_SIZE_V4=${SUBNETPOOL_SIZE_V4:-26} | 
 | SUBNETPOOL_SIZE_V6=${SUBNETPOOL_SIZE_V6:-64} | 
 |  | 
 | default_v4_route_devs=$(ip -4 route | grep ^default | awk '{print $5}') | 
 | die_if_not_set $LINENO default_v4_route_devs "Failure retrieving default IPv4 route devices" | 
 |  | 
 | default_v6_route_devs=$(ip -6 route | grep ^default | awk '{print $5}') | 
 |  | 
 | function _determine_config_l3 { | 
 |     local opts="--config-file $NEUTRON_CONF --config-file $Q_L3_CONF_FILE" | 
 |     echo "$opts" | 
 | } | 
 |  | 
 | function _configure_neutron_l3_agent { | 
 |  | 
 |     cp $NEUTRON_DIR/etc/l3_agent.ini.sample $Q_L3_CONF_FILE | 
 |  | 
 |     iniset $Q_L3_CONF_FILE DEFAULT debug $ENABLE_DEBUG_LOG_LEVEL | 
 |     iniset $Q_L3_CONF_FILE AGENT root_helper "$Q_RR_COMMAND" | 
 |     if [[ "$Q_USE_ROOTWRAP_DAEMON" == "True" ]]; then | 
 |         iniset $Q_L3_CONF_FILE AGENT root_helper_daemon "$Q_RR_DAEMON_COMMAND" | 
 |     fi | 
 |  | 
 |     _neutron_setup_interface_driver $Q_L3_CONF_FILE | 
 |  | 
 |     neutron_plugin_configure_l3_agent $Q_L3_CONF_FILE | 
 |  | 
 |     # If we've given a PUBLIC_INTERFACE to take over, then we assume | 
 |     # that we can own the whole thing, and privot it into the OVS | 
 |     # bridge. If we are not, we're probably on a single interface | 
 |     # machine, and we just setup NAT so that fixed guests can get out. | 
 |     if [[ -n "$PUBLIC_INTERFACE" ]]; then | 
 |         _move_neutron_addresses_route "$PUBLIC_INTERFACE" "$OVS_PHYSICAL_BRIDGE" True False "inet" | 
 |  | 
 |         if [[ $(ip -f inet6 a s dev "$PUBLIC_INTERFACE" | grep -c 'global') != 0 ]]; then | 
 |             _move_neutron_addresses_route "$PUBLIC_INTERFACE" "$OVS_PHYSICAL_BRIDGE" False False "inet6" | 
 |         fi | 
 |     else | 
 |         for d in $default_v4_route_devs; do | 
 |             sudo iptables -t nat -A POSTROUTING -o $d -s $FLOATING_RANGE -j MASQUERADE | 
 |         done | 
 |     fi | 
 | } | 
 |  | 
 | # Explicitly set router id in l3 agent configuration | 
 | function _neutron_set_router_id { | 
 |     if [[ "$Q_L3_ROUTER_PER_TENANT" == "False" ]]; then | 
 |         iniset $Q_L3_CONF_FILE DEFAULT router_id $ROUTER_ID | 
 |     fi | 
 | } | 
 |  | 
 | # Get ext_gw_interface depending on value of Q_USE_PUBLIC_VETH | 
 | function _neutron_get_ext_gw_interface { | 
 |     if [[ "$Q_USE_PUBLIC_VETH" == "True" ]]; then | 
 |         echo $Q_PUBLIC_VETH_EX | 
 |     else | 
 |         # Disable in-band as we are going to use local port | 
 |         # to communicate with VMs | 
 |         sudo ovs-vsctl set Bridge $PUBLIC_BRIDGE \ | 
 |             other_config:disable-in-band=true | 
 |         echo $PUBLIC_BRIDGE | 
 |     fi | 
 | } | 
 |  | 
 | function create_neutron_initial_network { | 
 |     local project_id | 
 |     project_id=$(openstack project list | grep " demo " | get_field 1) | 
 |     die_if_not_set $LINENO project_id "Failure retrieving project_id for demo" | 
 |  | 
 |     # Allow drivers that need to create an initial network to do so here | 
 |     if type -p neutron_plugin_create_initial_network_profile > /dev/null; then | 
 |         neutron_plugin_create_initial_network_profile $PHYSICAL_NETWORK | 
 |     fi | 
 |  | 
 |     if is_networking_extension_supported "auto-allocated-topology"; then | 
 |         if [[ "$USE_SUBNETPOOL" == "True" ]]; then | 
 |             if [[ "$IP_VERSION" =~ 4.* ]]; then | 
 |                 SUBNETPOOL_V4_ID=$(openstack --os-cloud devstack-admin --os-region "$REGION_NAME" subnet pool create $SUBNETPOOL_NAME --default-prefix-length $SUBNETPOOL_SIZE_V4 --pool-prefix $SUBNETPOOL_PREFIX_V4 --share --default | grep ' id ' | get_field 2) | 
 |             fi | 
 |             if [[ "$IP_VERSION" =~ .*6 ]]; then | 
 |                 SUBNETPOOL_V6_ID=$(openstack --os-cloud devstack-admin --os-region "$REGION_NAME" subnet pool create $SUBNETPOOL_NAME --default-prefix-length $SUBNETPOOL_SIZE_V6 --pool-prefix $SUBNETPOOL_PREFIX_V6 --share --default | grep ' id ' | get_field 2) | 
 |             fi | 
 |         fi | 
 |     fi | 
 |  | 
 |     if is_provider_network; then | 
 |         die_if_not_set $LINENO PHYSICAL_NETWORK "You must specify the PHYSICAL_NETWORK" | 
 |         die_if_not_set $LINENO PROVIDER_NETWORK_TYPE "You must specify the PROVIDER_NETWORK_TYPE" | 
 |         NET_ID=$(openstack --os-cloud devstack-admin --os-region "$REGION_NAME" network create $PHYSICAL_NETWORK --project $project_id --provider-network-type $PROVIDER_NETWORK_TYPE --provider-physical-network "$PHYSICAL_NETWORK" ${SEGMENTATION_ID:+--provider-segment $SEGMENTATION_ID} --share | grep ' id ' | get_field 2) | 
 |         die_if_not_set $LINENO NET_ID "Failure creating NET_ID for $PHYSICAL_NETWORK $project_id" | 
 |  | 
 |         if [[ "$IP_VERSION" =~ 4.* ]]; then | 
 |             if [ -z $SUBNETPOOL_V4_ID ]; then | 
 |                 fixed_range_v4=$FIXED_RANGE | 
 |             fi | 
 |             SUBNET_ID=$(openstack --os-cloud devstack-admin --os-region "$REGION_NAME" subnet create --project $project_id --ip-version 4 ${ALLOCATION_POOL:+--allocation-pool $ALLOCATION_POOL} $PROVIDER_SUBNET_NAME --gateway $NETWORK_GATEWAY ${SUBNETPOOL_V4_ID:+--subnet-pool $SUBNETPOOL_V4_ID} --network $NET_ID --subnet-range $fixed_range_v4 | grep ' id ' | get_field 2) | 
 |             die_if_not_set $LINENO SUBNET_ID "Failure creating SUBNET_ID for $PROVIDER_SUBNET_NAME $project_id" | 
 |         fi | 
 |  | 
 |         if [[ "$IP_VERSION" =~ .*6 ]]; then | 
 |             die_if_not_set $LINENO IPV6_PROVIDER_FIXED_RANGE "IPV6_PROVIDER_FIXED_RANGE has not been set, but Q_USE_PROVIDER_NETWORKING is true and IP_VERSION includes 6" | 
 |             die_if_not_set $LINENO IPV6_PROVIDER_NETWORK_GATEWAY "IPV6_PROVIDER_NETWORK_GATEWAY has not been set, but Q_USE_PROVIDER_NETWORKING is true and IP_VERSION includes 6" | 
 |             if [ -z $SUBNETPOOL_V6_ID ]; then | 
 |                 fixed_range_v6=$IPV6_PROVIDER_FIXED_RANGE | 
 |             fi | 
 |             SUBNET_V6_ID=$(openstack --os-cloud devstack-admin --os-region "$REGION_NAME" subnet create --project $project_id --ip-version 6 --ipv6-address-mode $IPV6_ADDRESS_MODE --gateway $IPV6_PROVIDER_NETWORK_GATEWAY $IPV6_PROVIDER_SUBNET_NAME ${SUBNETPOOL_V6_ID:+--subnet-pool $SUBNETPOOL_V6_ID} --network $NET_ID $fixed_range_v6 | grep 'id' | get_field 2) | 
 |             die_if_not_set $LINENO SUBNET_V6_ID "Failure creating SUBNET_V6_ID for $IPV6_PROVIDER_SUBNET_NAME $project_id" | 
 |         fi | 
 |  | 
 |         if [[ $Q_AGENT == "openvswitch" ]]; then | 
 |             sudo ip link set $OVS_PHYSICAL_BRIDGE up | 
 |             sudo ip link set br-int up | 
 |             sudo ip link set $PUBLIC_INTERFACE up | 
 |         fi | 
 |     else | 
 |         NET_ID=$(openstack --os-cloud devstack-admin --os-region "$REGION_NAME" network create --project $project_id "$PRIVATE_NETWORK_NAME" | grep ' id ' | get_field 2) | 
 |         die_if_not_set $LINENO NET_ID "Failure creating NET_ID for $PRIVATE_NETWORK_NAME $project_id" | 
 |  | 
 |         if [[ "$IP_VERSION" =~ 4.* ]]; then | 
 |             # Create IPv4 private subnet | 
 |             SUBNET_ID=$(_neutron_create_private_subnet_v4 $project_id) | 
 |         fi | 
 |  | 
 |         if [[ "$IP_VERSION" =~ .*6 ]]; then | 
 |             # Create IPv6 private subnet | 
 |             IPV6_SUBNET_ID=$(_neutron_create_private_subnet_v6 $project_id) | 
 |         fi | 
 |     fi | 
 |  | 
 |     if is_networking_extension_supported "router" && is_networking_extension_supported "external-net"; then | 
 |         # Create a router, and add the private subnet as one of its interfaces | 
 |         if [[ "$Q_L3_ROUTER_PER_TENANT" == "True" ]]; then | 
 |             # create a tenant-owned router. | 
 |             ROUTER_ID=$(openstack --os-cloud devstack-admin --os-region "$REGION_NAME" router create --project $project_id $Q_ROUTER_NAME | grep ' id ' | get_field 2) | 
 |             die_if_not_set $LINENO ROUTER_ID "Failure creating ROUTER_ID for $project_id $Q_ROUTER_NAME" | 
 |         else | 
 |             # Plugin only supports creating a single router, which should be admin owned. | 
 |             ROUTER_ID=$(openstack --os-cloud devstack-admin --os-region "$REGION_NAME" router create $Q_ROUTER_NAME | grep ' id ' | get_field 2) | 
 |             die_if_not_set $LINENO ROUTER_ID "Failure creating ROUTER_ID for $Q_ROUTER_NAME" | 
 |         fi | 
 |  | 
 |         EXTERNAL_NETWORK_FLAGS="--external" | 
 |         if is_networking_extension_supported "auto-allocated-topology"; then | 
 |             EXTERNAL_NETWORK_FLAGS="$EXTERNAL_NETWORK_FLAGS --default" | 
 |         fi | 
 |         # Create an external network, and a subnet. Configure the external network as router gw | 
 |         if [ "$Q_USE_PROVIDERNET_FOR_PUBLIC" = "True" ]; then | 
 |             EXT_NET_ID=$(openstack --os-cloud devstack-admin --os-region "$REGION_NAME" network create "$PUBLIC_NETWORK_NAME" $EXTERNAL_NETWORK_FLAGS --provider-network-type flat --provider-physical-network ${PUBLIC_PHYSICAL_NETWORK} | grep ' id ' | get_field 2) | 
 |         else | 
 |             EXT_NET_ID=$(openstack --os-cloud devstack-admin --os-region "$REGION_NAME" network create "$PUBLIC_NETWORK_NAME" $EXTERNAL_NETWORK_FLAGS | grep ' id ' | get_field 2) | 
 |         fi | 
 |         die_if_not_set $LINENO EXT_NET_ID "Failure creating EXT_NET_ID for $PUBLIC_NETWORK_NAME" | 
 |  | 
 |         if [[ "$IP_VERSION" =~ 4.* ]]; then | 
 |             # Configure router for IPv4 public access | 
 |             _neutron_configure_router_v4 | 
 |         fi | 
 |  | 
 |         if [[ "$IP_VERSION" =~ .*6 ]]; then | 
 |             # Configure router for IPv6 public access | 
 |             _neutron_configure_router_v6 | 
 |         fi | 
 |     fi | 
 | } | 
 |  | 
 | # Create private IPv4 subnet | 
 | function _neutron_create_private_subnet_v4 { | 
 |     local project_id=$1 | 
 |     if [ -z $SUBNETPOOL_V4_ID ]; then | 
 |         fixed_range_v4=$FIXED_RANGE | 
 |     fi | 
 |     local subnet_params="--project $project_id " | 
 |     subnet_params+="--ip-version 4 " | 
 |     if [[ -n "$NETWORK_GATEWAY" ]]; then | 
 |         subnet_params+="--gateway $NETWORK_GATEWAY " | 
 |     fi | 
 |     subnet_params+="${SUBNETPOOL_V4_ID:+--subnet-pool $SUBNETPOOL_V4_ID} " | 
 |     subnet_params+="${fixed_range_v4:+--subnet-range $fixed_range_v4} " | 
 |     subnet_params+="--network $NET_ID $PRIVATE_SUBNET_NAME" | 
 |     local subnet_id | 
 |     subnet_id=$(openstack --os-cloud devstack-admin --os-region "$REGION_NAME" subnet create $subnet_params | grep ' id ' | get_field 2) | 
 |     die_if_not_set $LINENO subnet_id "Failure creating private IPv4 subnet for $project_id" | 
 |     echo $subnet_id | 
 | } | 
 |  | 
 | # Create private IPv6 subnet | 
 | function _neutron_create_private_subnet_v6 { | 
 |     local project_id=$1 | 
 |     die_if_not_set $LINENO IPV6_RA_MODE "IPV6 RA Mode not set" | 
 |     die_if_not_set $LINENO IPV6_ADDRESS_MODE "IPV6 Address Mode not set" | 
 |     local ipv6_modes="--ipv6-ra-mode $IPV6_RA_MODE --ipv6-address-mode $IPV6_ADDRESS_MODE" | 
 |     if [ -z $SUBNETPOOL_V6_ID ]; then | 
 |         fixed_range_v6=$FIXED_RANGE_V6 | 
 |     fi | 
 |     local subnet_params="--project $project_id " | 
 |     subnet_params+="--ip-version 6 " | 
 |     if [[ -n "$IPV6_PRIVATE_NETWORK_GATEWAY" ]]; then | 
 |         subnet_params+="--gateway $IPV6_PRIVATE_NETWORK_GATEWAY " | 
 |     fi | 
 |     subnet_params+="${SUBNETPOOL_V6_ID:+--subnet-pool $SUBNETPOOL_V6_ID} " | 
 |     subnet_params+="${fixed_range_v6:+--subnet-range $fixed_range_v6 $ipv6_modes} " | 
 |     subnet_params+="--network $NET_ID $IPV6_PRIVATE_SUBNET_NAME " | 
 |     local ipv6_subnet_id | 
 |     ipv6_subnet_id=$(openstack --os-cloud devstack-admin --os-region "$REGION_NAME" subnet create $subnet_params | grep ' id ' | get_field 2) | 
 |     die_if_not_set $LINENO ipv6_subnet_id "Failure creating private IPv6 subnet for $project_id" | 
 |     echo $ipv6_subnet_id | 
 | } | 
 |  | 
 | # Create public IPv4 subnet | 
 | function _neutron_create_public_subnet_v4 { | 
 |     local subnet_params="--ip-version 4 " | 
 |     subnet_params+="${Q_FLOATING_ALLOCATION_POOL:+--allocation-pool $Q_FLOATING_ALLOCATION_POOL} " | 
 |     if [[ -n "$PUBLIC_NETWORK_GATEWAY" ]]; then | 
 |         subnet_params+="--gateway $PUBLIC_NETWORK_GATEWAY " | 
 |     fi | 
 |     subnet_params+="--network $EXT_NET_ID --subnet-range $FLOATING_RANGE --no-dhcp " | 
 |     subnet_params+="$PUBLIC_SUBNET_NAME" | 
 |     local id_and_ext_gw_ip | 
 |     id_and_ext_gw_ip=$(openstack --os-cloud devstack-admin --os-region "$REGION_NAME" subnet create $subnet_params | grep -e 'gateway_ip' -e ' id ') | 
 |     die_if_not_set $LINENO id_and_ext_gw_ip "Failure creating public IPv4 subnet" | 
 |     echo $id_and_ext_gw_ip | 
 | } | 
 |  | 
 | # Create public IPv6 subnet | 
 | function _neutron_create_public_subnet_v6 { | 
 |     local subnet_params="--ip-version 6 " | 
 |     subnet_params+="--gateway $IPV6_PUBLIC_NETWORK_GATEWAY " | 
 |     subnet_params+="--network $EXT_NET_ID --subnet-range $IPV6_PUBLIC_RANGE --no-dhcp " | 
 |     subnet_params+="$IPV6_PUBLIC_SUBNET_NAME" | 
 |     local ipv6_id_and_ext_gw_ip | 
 |     ipv6_id_and_ext_gw_ip=$(openstack --os-cloud devstack-admin --os-region "$REGION_NAME" subnet create $subnet_params | grep -e 'gateway_ip' -e ' id ') | 
 |     die_if_not_set $LINENO ipv6_id_and_ext_gw_ip "Failure creating an IPv6 public subnet" | 
 |     echo $ipv6_id_and_ext_gw_ip | 
 | } | 
 |  | 
 | # Configure neutron router for IPv4 public access | 
 | function _neutron_configure_router_v4 { | 
 |     openstack --os-cloud devstack-admin --os-region "$REGION_NAME" router add subnet $ROUTER_ID $SUBNET_ID | 
 |     # Create a public subnet on the external network | 
 |     local id_and_ext_gw_ip | 
 |     id_and_ext_gw_ip=$(_neutron_create_public_subnet_v4 $EXT_NET_ID) | 
 |     local ext_gw_ip | 
 |     ext_gw_ip=$(echo $id_and_ext_gw_ip  | get_field 2) | 
 |     PUB_SUBNET_ID=$(echo $id_and_ext_gw_ip | get_field 5) | 
 |     # Configure the external network as the default router gateway | 
 |     openstack --os-cloud devstack-admin --os-region "$REGION_NAME" router set --external-gateway $EXT_NET_ID $ROUTER_ID | 
 |  | 
 |     # This logic is specific to using the l3-agent for layer 3 | 
 |     if is_service_enabled q-l3 || is_service_enabled neutron-l3;  then | 
 |         # Configure and enable public bridge | 
 |         local ext_gw_interface="none" | 
 |         if is_neutron_ovs_base_plugin; then | 
 |             ext_gw_interface=$(_neutron_get_ext_gw_interface) | 
 |         elif [[ "$Q_AGENT" = "linuxbridge" ]]; then | 
 |             # Get the device the neutron router and network for $FIXED_RANGE | 
 |             # will be using. | 
 |             if [ "$Q_USE_PROVIDERNET_FOR_PUBLIC" = "True" ]; then | 
 |                 # in provider nets a bridge mapping uses the public bridge directly | 
 |                 ext_gw_interface=$PUBLIC_BRIDGE | 
 |             else | 
 |                 # e.x. brq3592e767-da for NET_ID 3592e767-da66-4bcb-9bec-cdb03cd96102 | 
 |                 ext_gw_interface=brq${EXT_NET_ID:0:11} | 
 |             fi | 
 |         fi | 
 |         if [[ "$ext_gw_interface" != "none" ]]; then | 
 |             local cidr_len=${FLOATING_RANGE#*/} | 
 |             local testcmd="ip -o link | grep -q $ext_gw_interface" | 
 |             test_with_retry "$testcmd" "$ext_gw_interface creation failed" | 
 |             if [[ $(ip addr show dev $ext_gw_interface | grep -c $ext_gw_ip) == 0 && ( $Q_USE_PROVIDERNET_FOR_PUBLIC == "False" || $Q_USE_PUBLIC_VETH == "True" || $Q_ASSIGN_GATEWAY_TO_PUBLIC_BRIDGE == "True" ) ]]; then | 
 |                 sudo ip addr add $ext_gw_ip/$cidr_len dev $ext_gw_interface | 
 |                 sudo ip link set $ext_gw_interface up | 
 |             fi | 
 |             ROUTER_GW_IP=$(openstack --os-cloud devstack-admin --os-region "$REGION_NAME" port list -c 'Fixed IP Addresses' --device-owner network:router_gateway | awk -F'ip_address'  '{ print $2 }' | cut -f2 -d\' | tr '\n' ' ') | 
 |             die_if_not_set $LINENO ROUTER_GW_IP "Failure retrieving ROUTER_GW_IP" | 
 |         fi | 
 |         _neutron_set_router_id | 
 |     fi | 
 | } | 
 |  | 
 | # Configure neutron router for IPv6 public access | 
 | function _neutron_configure_router_v6 { | 
 |     openstack --os-cloud devstack-admin --os-region "$REGION_NAME" router add subnet $ROUTER_ID $IPV6_SUBNET_ID | 
 |     # Create a public subnet on the external network | 
 |     local ipv6_id_and_ext_gw_ip | 
 |     ipv6_id_and_ext_gw_ip=$(_neutron_create_public_subnet_v6 $EXT_NET_ID) | 
 |     local ipv6_ext_gw_ip | 
 |     ipv6_ext_gw_ip=$(echo $ipv6_id_and_ext_gw_ip | get_field 2) | 
 |     local ipv6_pub_subnet_id | 
 |     ipv6_pub_subnet_id=$(echo $ipv6_id_and_ext_gw_ip | get_field 5) | 
 |  | 
 |     # If the external network has not already been set as the default router | 
 |     # gateway when configuring an IPv4 public subnet, do so now | 
 |     if [[ "$IP_VERSION" == "6" ]]; then | 
 |         openstack --os-cloud devstack-admin --os-region "$REGION_NAME" set --external-gateway $EXT_NET_ID $ROUTER_ID | 
 |     fi | 
 |  | 
 |     # This logic is specific to using the l3-agent for layer 3 | 
 |     if is_service_enabled q-l3 || is_service_enabled neutron-l3; then | 
 |         # Ensure IPv6 RAs are accepted on interfaces with a default route. | 
 |         # This is needed for neutron-based devstack clouds to work in | 
 |         # IPv6-only clouds in the gate. Please do not remove this without | 
 |         # talking to folks in Infra. | 
 |         for d in $default_v6_route_devs; do | 
 |             # Slashes must be used in this sysctl command because route devices | 
 |             # can have dots in their names. If dots were used, dots in the | 
 |             # device name would be reinterpreted as a slash, causing an error. | 
 |             sudo sysctl -w net/ipv6/conf/$d/accept_ra=2 | 
 |         done | 
 |         # Ensure IPv6 forwarding is enabled on the host | 
 |         sudo sysctl -w net.ipv6.conf.all.forwarding=1 | 
 |         # Configure and enable public bridge | 
 |         # Override global IPV6_ROUTER_GW_IP with the true value from neutron | 
 |         IPV6_ROUTER_GW_IP=$(openstack --os-cloud devstack-admin --os-region "$REGION_NAME" port list -c 'Fixed IP Addresses' | grep $ipv6_pub_subnet_id | awk -F'ip_address' '{ print $2 }' | cut -f2 -d\' | tr '\n' ' ') | 
 |         die_if_not_set $LINENO IPV6_ROUTER_GW_IP "Failure retrieving IPV6_ROUTER_GW_IP" | 
 |  | 
 |         if is_neutron_ovs_base_plugin; then | 
 |             local ext_gw_interface | 
 |             ext_gw_interface=$(_neutron_get_ext_gw_interface) | 
 |             local ipv6_cidr_len=${IPV6_PUBLIC_RANGE#*/} | 
 |  | 
 |             # Configure interface for public bridge | 
 |             sudo ip -6 addr replace $ipv6_ext_gw_ip/$ipv6_cidr_len dev $ext_gw_interface | 
 |             local replace_range=${SUBNETPOOL_PREFIX_V6} | 
 |             if [[ -z "${SUBNETPOOL_V6_ID}" ]]; then | 
 |                 replace_range=${FIXED_RANGE_V6} | 
 |             fi | 
 |             sudo ip -6 route replace $replace_range via $IPV6_ROUTER_GW_IP dev $ext_gw_interface | 
 |         fi | 
 |         _neutron_set_router_id | 
 |     fi | 
 | } | 
 |  | 
 | function is_networking_extension_supported { | 
 |     local extension=$1 | 
 |     # TODO(sc68cal) cache this instead of calling every time | 
 |     EXT_LIST=$(openstack --os-cloud devstack-admin --os-region "$REGION_NAME" extension list --network -c Alias -f value) | 
 |     [[ $EXT_LIST =~ $extension ]] && return 0 | 
 | } |