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i have 1 wan connection and a LAN connection. I want the Mikrotik router to switch from 1 to the other when it fails to get internet access.
ether 1 = ethernet by LAN (ip = 192.168.194.0/30) ---->main internet connection
ether 2 = dhcp client for a cable modem/router (ip= 192.168.42.0/24)-----> secondary connection
If internet 1 goes down, make 2 the main until it comes back, i have the ether 1 connection pointing to a public ip by Src-nat because i need to specify outgoing src-address for the packets.