Select the network type:
External Network
      Create a network that passes traffic over one of your VLANs
Internal Network
      Create a network that does not leave the XenServer host.
      This can be used as a private connection between VMs.
Name:
Description:
Select a physical network interface for the new network:
NIC:

Assign a number to your logical network or VLAN:
VLAN:
Automatically add this network to new virtual machines.

Select this check box to add this network to any new virtual machine (VM) created using New VM Wizard. You will be ableto remove this network when creating new VMs using the New VM Wizard