Following are Jon Chock's notes on how an Ultra 170 was configured to replace koki. See also the notes by Bob Kibrick and Kevin Tsubota.

Hi folks!

I modified the /var/yp/binding/summt*/ypservers file to force koki to use
kahana as the NIS server.  This should allow us to continue to use the esi
accounts on koki.

JC.