How Mikrotik uses switch chips to create "Router on a stick" configurations (e.g. most router models) : r/mikrotik
Amazon.com: Mikrotik CRS328-24P-4S+RM 24 port Gigabit Ethernet router/switch with four 10Gbps SFP+ ports in 1U rackmount case, Dual Boot and PoE output, 500W : Electronics