2/3. Your way of creating VLANs is indeed how things went before 12.1(T) i believe. Currently creating an SVI and assigning your access ports will do the trick. This indeed does not give your VLAN a name. For your administration it is most recommended to give your VLAN a name.
4. the number of your VLAN will not determine if your VOICE or DATA has privileges. To make data/voice more important you have to classify and use QoS to give a guarantee that Voice will be more important than Data.
5. Good point. Making the trunk port a portfast is only desirable when having a single uplink or on the access ports.
hey Chojin, thanks for your reply.
I did not worked with SVI for now, I only know that SVI represents a logical layer 3 interface on a switch. but thanks for the information.
Sorry I did not mean it in a privilege way, but I only recall from my study that giving your VOICE lower VLAN number than your DATA VLAN will help takign precedence in case of redundancy failure, so the lower VLAN number will be processed before highe VLAN numbers. Although, I should maybe check my info again.
I hope the fellows responsible for the Article will check our info first, test them, and if right modify the Article for better results.