That page does tell you Len Bosack founded XKL but IIRC (that was long ago!) it was Cisco’s original plan to make a PDP-10 clone, and they sold SUNET routers to fund the work. It was a rather successful pivot to make the routers the main business.
Another company that used that same hardware to get going was Sun Microsystems, though their initial plan didn’t change.
Another company that used that same hardware to get going was Sun Microsystems, though their initial plan didn’t change.