Using the Virtual Network Configuration module, you can create network bridges. You can also create and attach virtual interfaces to them.
To create a bridge, enter a label for the bridge and click "Create". The MTU and Name Description fields are optional. The bridge name will be generated automatically by the operating system. Once created, it will appear in the Xen Bridge Configuration module. You will have to use the label provided earlier to identify the bridge.
You can attach upto 64 virtual interfaces to a particular bridge. Device Number, Bridge Name and VM Name are the mandatory fields while creating a virtual interface.