[Qemu-devel] How can i run different router or switch on qemu

[Michael.Jacky via Qemu-devel]

Hello,
I'm sorry to waste your time.
Now I have a question and i can't find answer by google.
I need to use qemu to run different router,switch,and different 
type(example:cisco,netgear,forti and more) and use openstack vm to connect 
these equipment.
I found these equipment with different type,for example .bin,.img,and different 
equipment directory structure is different.
How can i run these equipments on qemu and what i need to do first.
Thank you very much.