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Mac doesn't login Windows Server

I have an iMac running SL and it is bind to a Windows 2003 server. The computer has a DHCP address. I am using my network login information to login to the domain. Randomly, it will stop working and I am not able to login despite the green dot (network accounts available). I have Admin rights to the domain and I have tried to login as a teacher.

Again, there will a few weeks where the teacher can login and everything is fine. Out of the blue, it will just stop working.

I know there are several factors involved....iMac, ethernet cable, ethernet port, switch, server, etc... that all can contribute to the issue.

If there is no network issues...switches, cable, server... then it should work as intended.

Each time I encounter this problem, I do a time sync on the iMac to make sure the time matches the server. Second, I unbind and rebind the computer to the domain. Once I perform both of these steps, in theory, it should work and remain stable.

I don't know why it randomly stops working and the teacher is no longer able to login and the computer will not accept any network logins beside a local account.

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First, is your server(s) using assigned addresses or DHCP.

What is the hierarchy of your network? One IP net, flat switched/bridged network, or subnet’ed via Routers

You can encounter a split horizon issue within IP addressing of your networks. In addition you could also have NetBIOS over IP (WINS) getting in the way.

You should look at getting a network sniffer on the wire to see what your system is doing on its network segment as well as what your server is doing on its network segment.

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The server does hand out IP addresses. The network is broken into several segments. The room where the Mac is located goes out through a switch upstairs then goes to another switch then to the server. The other rooms that use the same segment are fine. I am able to go to another room and login on a same type of computer.

With that said, I am looking to try and keep things stable for the next 6-8 weeks. Aside from doing a time sync and/or unbinding it, I wish there was an easier way to resolve this problem.


I guess I wasn't clear.

I wasn't worried about the DHCP aspect on how the client stations get their IP addresses I was wondering if your server was statically assigned or was it also DHCP assigned from your ISP.

What often happens is the IP address lease can expire so the station gets access to the internet but can't access local resources (your server) as your server's IP address is not within the same IP range of the new lease.

Does your switches all connectors to one common switch is a two level hierarchy?


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