In theory it should be like this:
First, the sending router will try to find out what the MAC address of the host with the correct destination IP, that is, I'll try to send a standard ARP request. If nobody answers, then the status for that record will be Incomplete, accordingly, no MAC address will not.
To another host replied to an ARP request, it is necessary that he himself was such an address or proxy ARP is enabled.
If the two router are connected to each other, it will be the MAC address of the adjacent router the outgoing packet.
That someone practiced:supportforums.cisco.com
And then there's Pro and cons of such a venture would say:learningnetwork.cisco.com