stacker@controller:~$ openstack subnet list
+--------------------------------------+-------------------------+--------------------------------------+--------------------+
| ID                                   | Name                    | Network                              | Subnet             |
+--------------------------------------+-------------------------+--------------------------------------+--------------------+
| 0280577e-e737-446e-9c4f-32a626d08b3b | Sandbox-Filtered-Subnet | dd30bcfe-1e79-4839-8982-375a33f8e649 | 10.2.1.0/24        |
| 6ac2afac-56cb-4b01-93a4-9d6d81fe56bb | Sandbox-Subnet          | dd30bcfe-1e79-4839-8982-375a33f8e649 | 1.2.100.128/25     |
| 91bd2cf6-6533-4c2f-a722-e3b0b957aefa | Sandbox-v6-Subnet       | dd30bcfe-1e79-4839-8982-375a33f8e649 | 2604:20:9::/48     |
| db78252d-c8d6-4655-b3d6-1824bbb3878a | private-subnet-4        | 6344692d-0da6-4eab-972a-e1d1417c7068 | 10.1.1.0/24        |
+--------------------------------------+-------------------------+--------------------------------------+--------------------+

stacker@nyc-controller:~$ openstack subnet show 91bd2cf6-6533-4c2f-a722-e3b0b957aefa
+-------------------------+---------------------------------------------------+
| Field                   | Value                                             |
+-------------------------+---------------------------------------------------+
| allocation_pools        | 2604:20:9::2-2604:180:9:ffff:ffff:ffff:ffff:ffff  |
| cidr                    | 2604:20:9::/48                                    |
| created_at              | 2018-02-16T17:32:06Z                              |
| description             |                                                   |
| dns_nameservers         |                                                   |
| enable_dhcp             | True                                              |
| gateway_ip              | 2604:20:9::1                                      |
| host_routes             |                                                   |
| id                      | 91bd2cf6-6533-4c2f-a722-e3b0b957aefa              |
| ip_version              | 6                                                 |
| ipv6_address_mode       | dhcpv6-stateful                                   |
| ipv6_ra_mode            | dhcpv6-stateful                                   |
| name                    | Sandbox-v6-Subnet                                 |
| network_id              | dd30bcfe-1e79-4839-8982-375a33f8e649              |
| project_id              | c620267c68684595a3fd630c16929495                  |
| revision_number         | 0                                                 |
| segment_id              | None                                              |
| service_types           |                                                   |
| subnetpool_id           | None                                              |
| tags                    |                                                   |
| updated_at              | 2018-02-16T17:32:06Z                              |
| use_default_subnet_pool | None                                              |
+-------------------------+---------------------------------------------------+

DNSMASQ PROCESS
nobody    1312  0.0  0.0  52876  2868 ?        S    Feb16   0:03 dnsmasq --no-hosts --no-resolv --strict-order --except-interface=lo --pid-file=/var/lib/neutron/dhcp/dd30bcfe-1e79-4839-8982-375a33f8e649/pid --dhcp-hostsfile=/var/lib/neutron/dhcp/dd30bcfe-1e79-4839-8982-375a33f8e649/host --addn-hosts=/var/lib/neutron/dhcp/dd30bcfe-1e79-4839-8982-375a33f8e649/addn_hosts --dhcp-optsfile=/var/lib/neutron/dhcp/dd30bcfe-1e79-4839-8982-375a33f8e649/opts --dhcp-leasefile=/var/lib/neutron/dhcp/dd30bcfe-1e79-4839-8982-375a33f8e649/leases --dhcp-match=set:ipxe,175 --bind-interfaces --interface=tap2da470de-e8 --dhcp-range=set:tag0,10.2.1.0,static,255.255.255.0,86400s --dhcp-range=set:tag1,1.2.100.128,static,255.255.255.128,86400s --dhcp-option-force=option:mtu,1500 --dhcp-lease-max=384 --conf-file=/etc/neutron/dnsmasq-neutron.conf --domain=openstacklocal