[CentOS] Affordable KVM over IP switch

> Are there any KVM over IP switches that are not thousands of dollars?
> Ideally a 3-4 port switch for a few hundred seems reasonable to me.
>

Try this 8-port one from LevelOne:

http://global.level1.com/Business-Products/KVM-Switches---Extenders/Rackmount-KVM-Switches/KVM-0831/421.html

It has an expansion slot which accepts a IP module:

http://download.level1.com/level1/manual/ACC-2000v1.0_UM.pdf

I use the base KVM, without the IP module, and it is very stable. It 
connects a USB keyboard and a USB mouse to USB and/or PS2 ports on the 
servers.

It is also cascadable.

I hope this helps.