add code

plugins/modules/vmware_guest_network.py

@@ -75,6 +75,7 @@
   network_name:
     description:
       - Name of network in vSphere.
+      - Work faster then o(vlan_id) for big infrastructure with many networks. 
     type: str
   device_type:
     default: vmxnet3
@@ -319,6 +320,14 @@ def _get_network_object(self, vm_obj):
         for pg in vm_obj.runtime.host.config.network.portgroup:
             pg_lookup[pg.spec.name] = {'switch': pg.spec.vswitchName, 'vlan_id': pg.spec.vlanId}
 
+        if network_name:
+            networks = self.find_network_by_name(network_name) 
+            for network in networks:
+                if network in compute_resource.network:
+                    dvs = network.config.distributedVirtualSwitch
+                    if (switch_name and dvs.config.name == switch_name) or not switch_name:
+                        return network
+
         if compute_resource:
             for network in compute_resource.network:
                 if isinstance(network, vim.dvs.DistributedVirtualPortgroup):