I have these configurations on two connected routers:
Connection = LAN to LAN.
ISP1 = ADSL internet connection 1.
ISP2 = ADSL internet connection 2.
DHCP = 192.168.1.2 to 192.168.1.254.
ISP1 -> Router 1 192.168.1.1 (DHCP on) -> (Router 2 and DVR have static IPs By MAC Address)
ISP2 -> Router 2 192.168.1.230 (DHCP off) -> DVR 192.168.1.239
All devices are working perfectly on both routers, but the DVR keeps warning about IP address conflict, and only when I connect the two routers a mysterious device appears in Router 1 DHCP with multiple (75 clients) IP addresses.