Help! New Switch = IT Disaster
Posted on 2013-05-31
Hi, On a small Windows 2003 Domain with about a dozen XP Pro SP3 clients, I replaced a TP Link unmanaged 24 port GB switch with a Dell PowerConnect 2824 Web Managed switch. After installation I was able to log into our server, our firewall, the switch itself, and was working from a nearby workstation client. All seemed in order. The lights on the switch indicated good connections from those clients which had been moved to the new switch that I had not actually visited and checked.
This morning several workstations were unable to access the network. Each one indicated Limited or No connectivity, and assigned a private IP address, though the lights on the switch indicated a good connection. Long story short, I checked the switch configuration (where I had done nothing fancy but the interface showed up and active connections on the port with affected clients), cables, tested connections between office data ports and the wiring closet with a tester. After a couple of hours and still no clue what the problem was, I attempted to go back to the beginning and removed the new switch and reconnected the previous unmanaged switch. This caused no change in the situation.
Finally, I took a functioning workstation that was able to access the network and moved it to an office with a client that was unable to access the network. When the workstations were switched, the workstation was able to access the network. So that indicated the connection between the office and the wiring closet was good and the problem was with the workstation, as unlikely as that was under the circumstances.
I replaced the NIC in two of the affected workstations. No change. I ran "netsh int ip reset" on two of the workstations. No change. Everything has been rebooted at least once. Where do I go from here? I have replaced switches before and never run into any issues such as this. Initially I thought perhaps I had caused a surge on the LAN while connecting the new switch, but that appears not to be the case. All suggestions much appreciated. Thanks!