Hello amawired1, have you figured out how to add an ext-2 external interface to your isilonSD nodes? We've tried adding a virtual network adapter (VMXNET 3 like ext-1) to each isilonSD VM. The new virtual ethernet adapter is detected within the isilonSD OS as vmx2 as shown by the output of ifconfig from a ssh console. However, we have not found a way to map these new vmx2 interfaces to cluster interfaces (e.g. ext-2). The output of "isi network interfaces list" only shows the ext-1 interfaces. By the way, we also rebooted the cluster after adding the virtual network adapters just in case. No dice.