Yes, that's what I am suggesting. Of course it isn't possible if there is a route between you and the devices you are trying to seek, however, as long as there is not a route between these devices, regardless of what subnet they are assigned to you can find, communicate and even configure the device via mac address addressing. As I previously mentioned, MikroTik equipment is set up like this, as long as I am on a flat network (no routes) if the device I am trying to find addressed to a different network, I can click a little button instead of using an IP address that does a MAC broadcast for MACs that start with MikroTik's prefix and it will pull up a list of IP and Mac of every MikroTik device regardless of subnet and IP address. I can then click on the MAC address of any of these nodes and open up Winbox and do full configuration tasks. The reason I am pushing this feature is that when you have a whole bunch of customers, vendors, partners that really are not network engineers, this is a big deal. If you don't know what the address is of a device, then it's a no brainer. Otherwise, you will likely have to reset the device to defaults to use it, and if there is a strategy archived on that device that is the only copy, then you have a real problem. Also, instead of having to change your PC's IP subnet to the same subnet of a brain or controller, open it up, change the IP back to the subnet you came from, then reset your PC's IP, you can do it all in one session by being able to set the IP address of this node from a different subnet and reboot it.