@@ -9,9 +9,6 @@ import (

 	"strings"

 	"time"

-	"github.com/spf13/cobra"

-	"golang.org/x/net/context"

-

 	"github.com/aanand/compose-file/loader"

 	composetypes "github.com/aanand/compose-file/types"

 	"github.com/docker/docker/api/types"

@@ -25,6 +22,8 @@ import (

 	"github.com/docker/docker/opts"

 	runconfigopts "github.com/docker/docker/runconfig/opts"

 	"github.com/docker/go-connections/nat"

+	"github.com/spf13/cobra"

+	"golang.org/x/net/context"

 )

 const (

@@ -123,7 +122,8 @@ func deployCompose(ctx context.Context, dockerCli *command.DockerCli, opts deplo

 	namespace := namespace{name: opts.namespace}

-	networks, externalNetworks := convertNetworks(namespace, config.Networks)

+	serviceNetworks := getServicesDeclaredNetworks(config.Services)

+	networks, externalNetworks := convertNetworks(namespace, config.Networks, serviceNetworks)

 	if err := validateExternalNetworks(ctx, dockerCli, externalNetworks); err != nil {

 		return err

 	}

@@ -136,6 +136,19 @@ func deployCompose(ctx context.Context, dockerCli *command.DockerCli, opts deplo

 	}

 	return deployServices(ctx, dockerCli, services, namespace, opts.sendRegistryAuth)

 }

+func getServicesDeclaredNetworks(serviceConfigs []composetypes.ServiceConfig) map[string]struct{} {

+	serviceNetworks := map[string]struct{}{}

+	for _, serviceConfig := range serviceConfigs {

+		if len(serviceConfig.Networks) == 0 {

+			serviceNetworks["default"] = struct{}{}

+			continue

+		}

+		for network := range serviceConfig.Networks {

+			serviceNetworks[network] = struct{}{}

+		}

+	}

+	return serviceNetworks

+}

 func propertyWarnings(properties map[string]string) string {

 	var msgs []string

@@ -182,18 +195,17 @@ func getConfigFile(filename string) (*composetypes.ConfigFile, error) {

 func convertNetworks(

 	namespace namespace,

 	networks map[string]composetypes.NetworkConfig,

+	servicesNetworks map[string]struct{},

 ) (map[string]types.NetworkCreate, []string) {

 	if networks == nil {

 		networks = make(map[string]composetypes.NetworkConfig)

 	}

-	// TODO: only add default network if it's used

-	networks["default"] = composetypes.NetworkConfig{}

-

 	externalNetworks := []string{}

 	result := make(map[string]types.NetworkCreate)

-	for internalName, network := range networks {

+	for internalName := range servicesNetworks {

+		network := networks[internalName]

 		if network.External.External {

 			externalNetworks = append(externalNetworks, network.External.Name)

 			continue

@@ -310,7 +322,7 @@ func convertServiceNetworks(

 		}

 		target := namespace.scope(networkName)

 		if networkConfig.External.External {

-			target = networkName

+			target = networkConfig.External.Name

 		}

 		nets = append(nets, swarm.NetworkAttachmentConfig{

 			Target:  target,