Help needed for simple (?) IP routing on CRS125

RouterOS General
1

Hello, folks. I have a CRS125-24G-1S-RM running 6.34. It was set up with the QuickConfig as a router. Upstream is on port 1. Local network is 192.168.18.0/24, and the CRS address is 192.168.18.1. The local network is configured to use the CRS as gateway. Machines on the local network can talk to each other and access the upstream network fine.

My problem comes in with a device (satellite modem) which connects to a remote site. The remote network is 192.168.19.0/24. This modem’s local interface is configured with an address of .18.254 and it is presently connected to port 24 on the CRS.

How to configure the CRS to send traffic for the 192.168.19.0/24 network out to the modem on port 24 rather than the default upstream gateway on port 1? I tried adding a static route, but that did not seem to work. For example, from a machine on the remote network (.19.44), if I try to ssh to a machine on the local network (.18.22) the incoming packets reach the .18.22 machine, but the responses never get back to the .19.44 machine to complete the connection.

I suspect this is a very simple thing to resolve, but I need a hand.

Thanks!

-Pete

2

Is the modem setup in bridged mode or routed mode?

What is the network on the “back side” of the modem?

3

/ip route add dst=192.168.19.0/24 gateway=192.168.18.254

Easy-peasey.

Of course the other side of the satellite link needs to know that 192.168.18.X comes back in your direction over the link - so whatever router is on the far side needs such a route as well (or perhaps the 192.168.19.x uses the satellite modem at your facility as its default GW, in which case you won’t need to do anything else at that end to make it work)

4

/me bangs head on keyboard

Thanks, the did the trick. Obvious in retrospect. I was fixated on the switch port, not the address.

-Pete