If you are configuring the name service (NIS+, NIS or DNS) on a system and the name server(s) exist on another subnet and the router does not broadcast its route, then the system identification tools fail to verify the name server.
If you choose DNS as the name service, the installation program prompts you to accept the unverified data and continue. If you choose NIS+ or NIS as the name service, the system identification cannot continue without verification and the name service cannot be configured during installation.
Workaround: Choose one of the following workarounds.
If you are installing using a graphical interface, open a terminal window and type the following command to add a router:
# route add default <ip_address_of_router>
If you are installing using a command line interface, choose nameservice = none. After the installation is complete, create the /etc/defaultrouter file and run sys-unconfig.