I would like to create multi vlan on my existing cisco switch 2960S for our new IPT project, existing i have a default vlan , and would like to create a voice vlan for cisco ITP , just wonder how do i create multi vlan on single port, i have search through internet and found below command, but it shows command invalid, is it my version of the switch doesnt support "switchport mode multi" command ? and i found that from other post, if multi doesnt support on this switch model, there is another solution, they suggest to use turnk ? can you explain how to do that ? i though there is only single port need to form trunk link to other switch, Hope you can help with my problem, Thx !
cisco_4-21f(config-if)#switchport mode multi
% Invalid input detected at '^' marker.
cisco switch 2960s version