HI I am a network expert with an experience up to 12 years configuring , supporting and administrating a computer network , I am also work as a part time instructor for cisco courses academic and professional courses. I have configured so many catalyst switches like 3550, 3560,3750 , 2950, 2960 , 4500 and 6500 , as I know all what you need is voice vlan , data vlan , intervlan routing , stp , ether-channel , hsrp if required , admin authentication , device security and quality of service.