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Can't connect to network after reconnecting Vista

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Can't connect to network after reconnecting Vista

Postby chicagotech » Tue Oct 14, 2008 10:39 pm

Windows Vista Enterprise SP1 cannot connect back to the network after
disconnecting the Ethernet cable from the NIC connection and then plugging
it back in. The customer has to reboot the machine to get the IP address.

Before we go further, I would like to confirm the following items:

1. When did this issue occur? What changes have been done to the machine
before this issue? Did it ever work before?
2. Can Vista reconnect to the network after performing the following
command?

1) Click Start and then type "cmd" (without quotation mark) in the Start
Search box, right click CMD listed above and choose Run as administrator.
2) Type the following commands:

Ipconfig /release
Ipconfig /renew

If this issue persists, what IP is obtained now?

3. Does this issue occur on all machines on the network? Does it only occur
on Vista machines? Does this issue occur on other user accounts when using
the problematic Vista machine?

This issue can be caused by out-of-date network card driver or incorrect
TCP/IP settings. Based on the current situation, I suggest we perform the
following steps to troubleshoot the issue.

Step 1: Update the driver of the network card.
===============
According to my experience, many network related issues are caused by
incorrect or out-of-date network devices driver/firmware. Also, this issue
can be caused by malfunction network devices. Therefore, you can update the
driver/firmware of your network devices such as network card, router,
switch to troubleshoot the issue. Also, you can replace these network
devices such as network card, router, switch one by one to check the
results.

Step 2: DHCP client service does not start properly.
================
1. Click Start and then type services.msc in the Start Search box and then
press Enter.
2. Double click DHCP client service. Please check whether its service
status is Started. Also, please ensure its Startup type is Automatic.

Step 3: Reset network settings
===========
1. Click Start, type "%SystemRoot%\system32\drivers\etc" (Without the
quotation) and then press Enter.
2. Right-click on the file "Hosts" (without quotations) and choose Rename
3. Rename the file to "hostsold" (without quotations)
4. Then, clear the DNS (Domain Name Resolution) cache, reset winsock,
Reinstall and Reset TCP/IP.

1). Click Start, type "cmd" (Without the quotation) in the Start Search
box. Right click "cmd" listed above and then choose "Run as administrator".
2). In the command line window, type: "ipconfig /flushdns" (Without
quotations) and press Enter.
3). In the command line window, type: "netsh winsock reset" (Without
quotations) and press Enter.
4). In the command line window, type: "netsh int ip reset" (Without
quotations) and press Enter.
5). Restart the computer and check the results.
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
chicagotech
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