Disadvantages of Routers
Routers work only with routable network protocols; not all protocols are routable.
Routers are more expensive than bridges or repeaters.
Dynamic router communications (inter-router communication) causes additional network traffic.
Routers are slower than bridges or repeaters because they must analyze a data transmission from the Physical to the Network layer.
Repeaters and bridges only need to read two layers of information: the Data Link and Physical.