Improved behavior for case if vlan_id is not set

plugins/providers/hyperv/action/net_set_vlan.rb

@@ -8,9 +8,10 @@ module VagrantPlugins
 
         def call(env)
           vlan_id = env[:machine].provider_config.vlan_id
-
-          env[:ui].info("[Settings] [Network Adapter] Setting Vlan ID to: #{vlan_id}")
-          env[:machine].provider.driver.net_set_vlan(vlan_id)
+          if  vlan_id
+            env[:ui].info("[Settings] [Network Adapter] Setting Vlan ID to: #{vlan_id}")
+            env[:machine].provider.driver.net_set_vlan(vlan_id)
+          end  
           @app.call(env)
         end
       end

plugins/providers/hyperv/config.rb

@@ -3,20 +3,13 @@ require "vagrant"
 module VagrantPlugins
   module HyperV
     class Config < Vagrant.plugin("2", :config)
-      # The timeout to wait for an IP address when booting the machine,
-      # in seconds.
-      #
-      # @return [Integer]
-      attr_accessor :ip_address_timeout
-      attr_accessor :memory
-      attr_accessor :maxmemory
-      attr_accessor :cpus
-      attr_accessor :vmname
-
-      # The default VLAN ID for network interface for the virtual machine.
-      #
-      # @return [Integer]
-      attr_accessor :vlan_id
+      
+      attr_accessor :ip_address_timeout # Time to wait for an IP address when booting, in seconds @return [Integer]
+      attr_accessor :memory #  Memory size in mb @return [Integer]
+      attr_accessor :maxmemory # Maximal memory size in mb enables dynamical memory allocation @return [Integer]
+      attr_accessor :cpus # Number of cpu's @return [Integer]
+      attr_accessor :vmname # Name that will be shoen in Hyperv Manager @return [String]
+      attr_accessor :vlan_id # VLAN ID for network interface for the virtual machine. @return [Integer]
 
       def initialize
         @ip_address_timeout = UNSET_VALUE
@@ -35,7 +28,7 @@ module VagrantPlugins
         @maxmemory = nil if @maxmemory == UNSET_VALUE
         @cpus = nil if @cpus == UNSET_VALUE 
         @vmname = nil if @vmname == UNSET_VALUE
-        @vlan_id = 0 if @vlan_id == UNSET_VALUE
+        @vlan_id = nil if @vlan_id == UNSET_VALUE
       end
 
       def validate(machine)