You should add another network fior this to the DC & attach it to the cluster(s)
where the VMs needing it are defined.
At this point you should be able to create virtual NICs in the VMs that use this
network.
Then you should set it up on the hosts that have this NIC.
If not all hosts in the cluster have this connection then you should attach the network
as not required.
thanks - i shall try this shortly and report back
cheers