Similar to the self-service deployment example, this configuration supports
multiple VXLAN self-service networks. After enabling high-availability, all
additional routers use VRRP. The following procedure creates an additional
self-service network and router. The Networking service also supports adding
high-availability to existing routers. However, the procedure requires
administratively disabling and enabling each router which temporarily
interrupts network connectivity for self-service networks with interfaces
on that router.

#. Source a regular (non-administrative) project credentials.
#. Create a self-service network.

   .. code-block:: console

      $ openstack network create selfservice2
      +-------------------------+--------------+
      | Field                   | Value        |
      +-------------------------+--------------+
      | admin_state_up          | UP           |
      | mtu                     | 1450         |
      | name                    | selfservice2 |
      | port_security_enabled   | True         |
      | router:external         | Internal     |
      | shared                  | False        |
      | status                  | ACTIVE       |
      +-------------------------+--------------+

#. Create a IPv4 subnet on the self-service network.

   .. code-block:: console

      $ openstack subnet create --subnet-range 198.51.100.0/24 \
        --network selfservice2 --dns-nameserver 8.8.4.4 selfservice2-v4
      +-------------------+------------------------------+
      | Field             | Value                        |
      +-------------------+------------------------------+
      | allocation_pools  | 198.51.100.2-198.51.100.254  |
      | cidr              | 198.51.100.0/24              |
      | dns_nameservers   | 8.8.4.4                      |
      | enable_dhcp       | True                         |
      | gateway_ip        | 198.51.100.1                 |
      | ip_version        | 4                            |
      | name              | selfservice2-v4              |
      +-------------------+------------------------------+

#. Create a IPv6 subnet on the self-service network.

   .. code-block:: console

      $ openstack subnet create --subnet-range fd00:198:51:100::/64 --ip-version 6 \
        --ipv6-ra-mode slaac --ipv6-address-mode slaac --network selfservice2 \
        --dns-nameserver 2001:4860:4860::8844 selfservice2-v6
      +-------------------+--------------------------------------------------------+
      | Field             | Value                                                  |
      +-------------------+--------------------------------------------------------+
      | allocation_pools  | fd00:198:51:100::2-fd00:198:51:100:ffff:ffff:ffff:ffff |
      | cidr              | fd00:198:51:100::/64                                   |
      | dns_nameservers   | 2001:4860:4860::8844                                   |
      | enable_dhcp       | True                                                   |
      | gateway_ip        | fd00:198:51:100::1                                     |
      | ip_version        | 6                                                      |
      | ipv6_address_mode | slaac                                                  |
      | ipv6_ra_mode      | slaac                                                  |
      | name              | selfservice2-v6                                        |
      +-------------------+--------------------------------------------------------+

#. Create a router.

   .. code-block:: console

      $ openstack router create router2
      +-----------------------+---------+
      | Field                 | Value   |
      +-----------------------+---------+
      | admin_state_up        | UP      |
      | name                  | router2 |
      | status                | ACTIVE  |
      +-----------------------+---------+

#. Add the IPv4 and IPv6 subnets as interfaces on the router.

   .. code-block:: console

      $ openstack router add subnet router2 selfservice2-v4
      $ openstack router add subnet router2 selfservice2-v6

   .. note::

      These commands provide no output.

#. Add the provider network as a gateway on the router.

   .. code-block:: console

      $ openstack router set --external-gateway provider1 router2