NIS+ and nsswitch.conf settings

I am pretty new to NIS+, but I'm investigating setting it up in environment to help alleviate management of various files on a per-system basis. For NIS+, there is the concept of a master server and a replica server. If the master server goes down then then the replica takes over.
If for any reason both master and replica servers are down, then the /etc/nsswitch.conf file determines the order of precedence. The entry for passwd in the nsswitch.conf file is:
passwd: files nisplus
One of my goals of setting up NIS+ is to alleviate having to manage a password file for each machine. If for some reason both of my NIS+ servers are down, it will revert back to the /etc/passwd file. Does this mean I would still need to have an /etc/passwd for each machine as a safeguard? or does NIS+ perform some kind of syncing mechanism to maintain local consistency of files for clients?
Many Thanks

Nope, he was right. If you look at the /etc/nsswitch.conf (or nsswitch.nisplus if you haven't moved it in yet) you'll see the entry:
passwd: files nisplus
The order of the lookup is "files" (which is your /etc/passwd file) first, and then if it can't find the entry there it will go out to the nis+ server. So essentially you'd take the users you want to use NIS out of the client passwd file and put them into the NIS+ passwd file.
I think the problem you're having is that you still want the users to have the access to the client & resources, even if the master & secondary servers go down. That's just not possible. The master & replica servers are there to provide the functionality of centralized user management. If that functionality is lost, then naturally you will see degradation in the quality of service you provide to the end user. So if both servers do go down, then your users will also be down. That is why there is redundancy built into the NIS+ system so that if one of the NIS+ servers go down, the client has a secondary server it can contact & authenticate to. The theory is that you can get the primary server back up and running while your secondary server handles the load. If you are concerned about the master & secondary server going down at the same time, then please note that you can have more then one secondary NIS+ server.
Daryl

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    Hello NotAppleSavy,
    Thanks for the question. After reviewing your post, it sounds like the computer wont connect to networks. I see you have used network diagnostic. I would recommend that you read this article, there are a lot of other things you can do in this article that may be able to help you resolve or isolate the issue.
    Wi-Fi: How to troubleshoot Wi-Fi connectivity
    Thanks for using Apple Support Communities.
    Have a nice day,
    Mario

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