I have one network without internet connection with mikrotik serving as router at 192.168.88.0/24. I have a server and various devices connected with PtmP wireless links.
Now i need to make this site have internet. To achieve this i have to setup a PtP link and connect with the existing network.
On the remote site the modem-router is on 192.168.1.0/24 network. Due to the morphology of the place and to avoid more links to reach wan of the MT i want to connect to a switch located in the network.
I want to leave intact the internet modem-router on the remote location because there are cameras and other stuff there.
What i have thought and i attach is to get a second mikrotik, connect modem-router with MT wan1 and on lan1 give the ip 192.168.88.254 which is my current network.
Then configure my DHCP server MT to use 192.168.88.254 as DF Gateway.
So all devices talk with 1st MT get ip and gateway for 2nd MT to get internet.
It is possible, but devices have to be able to access their gateway. From the topology chart I’d say that gateway device will have “local” IP address 192.168.88.254. If your “normal” devices can ping this address, then you just set DHCP server to send 192.168.88.254 as gateway address in DHCP leases.
You can’t set 192.168.1.254 as gateway for devices on network 192.168.88.0/24 … because normally devices won’t know how to send IP packets to this address. Some devices can help here (by answering to ARP requests for any address which is not local to that interface) but that goes against basic idea about how routing is supposed to work. And can mess things if such device answers to ARP request which has legitimate destination within same physical network while such device doesn’t know about it.
i’m guessing the second part of your answer is because i mistyped that i will use 192.168.1.254 as DF Gateway. I edited this portion.
As for the first part, all my devices will be able to ping 192.168.88.254 gateway router as long as the PtP link is alive. If it’s not i won’t have internet anyway.
Also the majority of my devices have static ip and most propably i will configure each of them with them 192.168.88.254 as gateway.
