# File lib/fog/aws/requests/compute/create_network_interface.rb, line 65
        def create_network_interface(subnetId, options = {})
          response = Excon::Response.new
          if subnetId
            id = Fog::AWS::Mock.network_interface_id

            groups = {}
            if options['GroupSet']
              options['GroupSet'].each do |group_id|
                name = self.data[:security_groups].select { |k,v| v['groupId'] == group_id } .first.first
                if name.nil?
                  raise Fog::Compute::AWS::Error.new("Unknown security group '#{group_id}' specified")
                end
                groups[group_id] = name
              end
            end
            if options['PrivateIpAddress'].nil?
              options['PrivateIpAddress'] = "10.0.0.2"
            end

            data = {
              'networkInterfaceId' => id,
              'subnetId'           => subnetId,
              'vpcId'              => 'mock-vpc-id',
              'availabilityZone'   => 'mock-zone',
              'description'        => options['Description'],
              'ownerId'            => '',
              'requesterManaged'   => 'false',
              'status'             => 'available',
              'macAddress'         => '00:11:22:33:44:55',
              'privateIpAddress'   => options['PrivateIpAddress'],
              'sourceDestCheck'    => true,
              'groupSet'           => groups,
              'attachment'         => {},
              'association'        => {},
              'tagSet'             => {}
            }
            self.data[:network_interfaces][id] = data
            response.body = {
              'requestId'        => Fog::AWS::Mock.request_id,
              'networkInterface' => data
            }
            response
          else
            response.status = 400
            response.body = {
              'Code'    => 'InvalidParameterValue',
              'Message' => "Invalid value '' for subnetId"
            }
          end
        end