I am, using WS-C2960S-24PD-L switch.
% Unrecognized command error message when I was going to config a trunk at interface Gi1/0/14.
Enter configuration commands, one per line. End with CNTL/Z.
CW2960(config-if)#switchport trunk encapsulation ?
% Unrecognized command
CW2960(config-if)#switchport trunk encapsulation ▒
I would appreciate very much if you would explain the reason why?
Depending on the IOS version you’ll need to add “Switchport mode trunk”. Looks like you’re looking for the command “Switchport Trunk Encapsulation Dot1q”. That command was mostly removed in newer IOS.
Hi George A,
Thank you for your reply.
It looks to me that the switch WS-C2960S-24PD-L is glued to “dot1q” and therefore “trunk encapsulation” command is not supported.
CW2960(config-if)#do sh int gi1/0/14 capabilities
Trunk encap. type: 802.1Q
Trunk mode: on,off,desirable,nonegotiate
Broadcast suppression: percentage(0-100)
Fast Start: yes
QoS scheduling: rx-(not configurable on per port basis),
tx-(4q3t) (3t: Two configurable values and one fixed.)
CoS rewrite: yes
ToS rewrite: yes
Inline power: yes