Network went down completely. Now cant access mapped drives
Posted on 2011-03-15
Hi, I'm tearing my hair out over this one. We've been having occasional network problems up until yesterday, where the network goes down for a few minutes and then comes up back up. Then yesterday everyone loses connection to the server and the internet and it stays down.
First I tried pinging the router from the server, and wasn't getting anything, so I bypassed the switch and plugged the server directly into the router. Then when I pinged the router, it would connect sporadically. Sometimes getting a response and sometimes not. So I figured the router was bad and replaced the router with a known good router. Still had problems pinging the router, so I disconnected the cable connecting the switch to the router, leaving just the server plugged into the router and then it worked fine consistently. At that point the server could access the internet, but as soon as I plugged in the switch, it went down. So I methodically unplugged different cables going into the switch and finally isolated what was apparently causing the server not to function when the switch was connected. At this point all workstations except the one that I had to unplug could : ping the router, access the internet, BUT only some of them could access their mapped drives to the server. The others, when you try to click on them, a request came up to re-enter the user name and password, but when the correct user name and password were entered, the workstation still could not access the mapped drives.
There are a lot of 1054 errors in the event log.
If I look at the DNS on the server, it has all of the old IP addresses, from the workstations PRIOR to the new router and them being assigned new IP addresses.
I have no real experience with DNS and Active directory, but it seems that the problem lies somewhere in that area.
Some of the workstations are set up with the two server IP addresses as the DNS addresses and some are set up with one server IP address as the primary DNS and our ISP's DNS as the secondary DNS address. I dont know if that is relevant.
The server has two NIC cards each with static IPs. I don't know if these are set up correctly as I get an error about having duplicate names.
Any help you can give me in understanding what's causing this problem and how to fix it would be much appreaciated!
We use Windows Server 2003 (Domain set up). About 35 workstations with Win XP Pro.