First post so be nice 
Let’s assume our main site LAN is on 192.168.1.x.
We have an aging Cisco 2501 with a single 10base-T interface onto the LAN.
It’s configured at 192.168.1.254 and has 2 routes.
Traffic for a remote office (let’s say 192.168.2.x) routes through 192.168.1.253 (the interface at our end of the point to point circuit)
Traffic for 0.0.0.0 (essentially the Internet) goes to 192.168.1.252 which is the internal interface of our proxy/firewall server.
Would I be able to replace the Cisco with something like a MikroTik Routerboard 150?
In reality the 2501 isn’t actually doing much in terms of handling traffic, it seems to simply be sending clients direct to the necessary gateway via ICMP redirect.
We have approximately 500 LAN clients and whilst at some point I may look at whether we should change the LAN topology, for now things seem to work so it’s the path of least change.
Thanks in advance.