    # File lib/fog/openstack/requests/network/create_subnet.rb, line 6
            def create_subnet(network_id, cidr, ip_version, options = {})
              data = {
                'subnet' => {
                  'network_id' => network_id,
                  'cidr'       => cidr,
                  'ip_version' => ip_version,
                }
              }

              vanilla_options = [:name, :gateway_ip, :allocation_pools,
                                 :dns_nameservers, :host_routes, :enable_dhcp,
                                 :tenant_id]
              vanilla_options.reject{ |o| options[o].nil? }.each do |key|
                data['subnet'][key] = options[key]
              end

              request(
                :body     => Fog::JSON.encode(data),
                :expects  => [201],
                :method   => 'POST',
                :path     => 'subnets'
              )
            end