The MikroTik units are sitting between the school network and a 100Mb/s fiber optic WAN connection back to the county office. There's no NAT or any advanced routing taking place, all that is done on a Cisco ME3400 which is set up and maintained by the county office. The network consists of mainly ol...

I have installed several RB1100AHx2 units at a school I work for and they've been working perfectly for several months. Recently the DHCP leases have been being used up by devices with 00:00:00:00:00:00 MAC addresses. When I try to ping the IP addresses issued to these all 0 MACs I get a message say...