On my old Allied Telesis router I had a single interface for internal traffic. I had multiple networks talking on this one interface. For example 192.168.2.X was vlan 1-2, and 192.168.3.X was vlan 1-3. This was all achieved without any vlan tagging or trunk ports. My switches are just acting as dumb switches without any vlans at all.
Can anyone tell if this possible on a juniper srx router or cisco? I've read through documentation but pretty much all of it recommends to do vlan tagging/trunking across switches.
thanks