ok, so here is what I have, Avocent PS/2 sip, connected to the Triplite PS2 to usb adapter, which then connects to the USB port on the R210ii. The video goes straight from the system to the Avocent sip's video cable.
The Avocent sip connects to the dell 2161DS KVM unit via a network cable.
I am currently installing Windows 2008R2 Sp1 on the R210ii and the mouse and keyboard are behaving properly.
The model of the triplite ps2 to usb dongle is B015-000