A Citrix Administrator creates an external network in a XenServer deployment; however, virtual machines connected to the newly created external network CANNOT communicate with other devices on the sam

A NAT router would still allow outbound communication from VMs to the subnet (and potentially beyond), so complete failure to communicate with same-subnet devices is not consistent with NAT being the sole cause.

MAC filtering restricts communication to specific MAC addresses but would selectively block individual VMs rather than causing a universal failure across all VMs on the newly created external network.

If the physical NIC assigned to the external network has a disconnected link status (cable unplugged, switch port down, or NIC failure), no traffic can pass between VMs and the physical subnet regardless of software configuration.

If the external network is mapped to an incorrect VLAN ID, tagged frames will be sent to the wrong VLAN segment and will not reach devices on the XenServer host's native subnet, causing communication to fail.