Vulnerability scanning other devices (switches, firewalls, etc)

What are you guys using to scan for vulenerabilities on your network switches, firewalls, access control, IP cameras, VMWare, etc, etc?

I just started using Action1 to get my Windows PCs up to date, but wondering if I should look at my other devices. Or am I small enough with 20 network switches and 2 firewalls to not need a scanner for these devices?