Can 4000-M Routing VLANs ? Can 4000-M Routing VLANs ? mikey789 (Systems Engineer) (OP) 19 Jan 19 20:16 I have an older 4000-M, and would like to route between vlans, is this possible ? If so, what would be the oldest IOS to do this (don't you just love the Feature Navigator ?) and smallest, as I only have 16MB DRAM.