Problems With Setting Up Network Installations
Unknown client “host_name”
Cause: 
The host_name argument in the add_install_client command is not a host in the naming
service.
Solution: 
Add the host host_name to the naming service and run the add_install_client
command again.
Error: <system name> does not exist in the NIS ethers map
Add it, and rerun the add_install_client command
Description: 
When you run the add_install_client command, the command fails with the above error.
Cause: 
The client you are adding to the install server does not exist in
the server's /etc/ethers file.
Solution: 
Add the needed information to the /etc/ethers file on the install server
and run the add_install_client command again.
- Become superuser or assume an equivalent role. 
- On the client, find the ethers address. - # ifconfig -a grep ethers
ether 8:0:20:b3:39:1d 
- On the install server, open the /etc/ethers file in an editor. Add the address to the list. 
- On the client, run add_install_client again as in this example. - # ./add_install_client bluegill sun4u