Configure fiber optic module port on X450

[Fiffo_Liffo]

i have an x450 with 24 eternet port +04 Fiber optical ports.
I added a new Optical F module and i don't know i had to make free the correspondant port on ethernet ?
All ethernet ports are used.
how can i configure the new trunk optical ports ?

[Fiffo_Liffo]

thank you for all

[Fiffo_Liffo]

good
the trunk port for that switch will be 1:24 (actual copper port) or 1:25 ? (because i found that there is 1:25 and 1:26 which are not hardly marked on ports).

[Fiffo_Liffo]

i have only "X450" and yes i have an XGM module. Now i have plugged an sfp module.

[Drew_C]

Is it an X450a or X450e?
Ports 25 and 26 are on the back of that switch, and will only be available if there's an XGM module installed.
You can see the front ports and the green/yellow line up close in this image:
http://assets.extremenetworks.com/sites/default/files/null/Summit_x005F_x450a_24T_0006.jpg