Hi,
I have tried to google the topic, but I can't somehow decide, if having two IP addresses from the same subnet on two different physical interfaces, is a problem or not.
The situation is quite simple - imagine PC / notebook connected by both the ethernet cable and wi-fi to one MT router via a switch, being offered IP addresses from the same subnet. E.g. eth: 10.0.1.1/24 and wi-fi: 10.0.1.2/24.
I just wonder, if it could posses some problems in communication? Or even some loops? I have found we've got such setup on multiple locations. I reconfigured one of them to use the VLANs to separate the traffic, but was told by one of the suppliers, that there should not be any problem to such setup.
So - is that just me having wrong assumption of eventual problems? E.g. some notebook producers allow you tu disable wi-fi, if eth is connected, via a bios setting and I think there might be a good reason for that ....
It is possible, on the WIFI-AP just need to use "bridge to vlan" or "bridge to LAN" - then "the WIFI clients will look like as a wired LAN clients".
The other question is also possible but not with mikrotik router - that technology is called VRF ( virtual routing and forwarding ) - because mikrotik's VRF implementation is not the "true VRF" they using the "routing mark" hacks. The VRF is like a L3 domain, when you assign an interface to specific VRF - domain, it has its unique RIB and FIB, ( route table ), when you want exchange traffic between the VRF-Domains thats called "VRF route leaking" in this case you need to use some dynamic-routing protocol to exchange the route-tables between the VRF-Domains, that protocol is MP-BGP ( Multiprotocol - BGP ).
When you using VRF without BGP / MP-BGP - thats called "VRF-lite" in cisco terminology.
Vendors: Cisco, Juniper, HPE Comware
I introduced the basics, now you can use google for the rest.