Hi all.

How can I find the MAC address of a device connected to an ethernet port?
The connected device is a BDCOM ONU and does not have an IP address associated to it.

I've tried ARP and Torch but don't see anything there.

Any help would be much appreciated

My favourite solution to most problems: Packet sniffer!
Make sure it is stopped, select correct interface and set the "direction" to RX only. Then you can start it.
That way, it will record only packets received on that interface - essentially, only packets from your ONU

If the interface is in a bridge, make sure it is not HW-offloaded.

You might just be my new favorite person It worked like a charm! This is going to make my day job so much easier.

Thank you very much.