Prior to Sun, Andy had a company called VLSI Technology, Inc. which licensed SUN designs to 5-10 companies, including Forward Technology and CoData, IIRC.  The SUN IPR effectively belonged to Andy, but I don't know what kind of legal arrangement he had with Stanford.   But the design was not generally public, and relied on CAD tools only extant on the Stanford PDP-10.  Cisco did start with the SUN-1 processor, though whether they got it from Andy or direct from Stanford is not known to me.  When Cisco started (1984), the Sun-1 was long dead already at Sun.