This waiting time varies depending on the reason the server is unreachable. Adding slave servers increases the availability of information. Normally, there should be at least one slave server for each domain. The number of slave servers in a domain should be balanced to achieve the desired level of availability and response time without adding the expense of copying data to too many systems. Clients NIS clients make up the majority of hosts in a NIS domain.
Clients run the ypbind daemon, which enables client processes to obtain information from a server.
Clients do not maintain maps themselves, but rather query servers for system and user account information. The server searches its local database and returns the requested information to the client. NIS clients locate the server by broadcasting on the networks that are directly connected to the client machine. Since these broadcast messages will not be forwarded by network gateways, if there is no NIS server that can be reached without using a network gateway, the client must specify a server when starting the ypbind daemon. Note that every request for system information requires a server contact, and the speed of your network can affect the response time.