DHCP is a protocol that automatically assigns network information to devices on the network. It sounds like the DVR is either not looking for or not finding the router that supplies that information. I'm guessing the IP is probably in the 169.254 range, rather than the more typical 192.168.x.x range. Given that your other devices work fine on that port, I'm thinking the problem is definitely on the DVR side of things rather than the router side of things. Go ahead and look in the advanced network setup option, just don't change anything.. the Cancel button is your friend.
