Do you think Mikrotik will ever provide a firmware update or RouterOS update which will allow the RB493G to support Fast Path since it doesn’t support it at the moment?
http://wiki.mikrotik.com/wiki/Manual:Fast_Path#List_of_RouterBoards_with_FastPath_support
name="ether1" default-name="ether1" type="ether" mtu=1500 actual-mtu=1500 l2mtu=1520 max-l2mtu=1520 mac-address=XX:XX fast-path=no