Unrecognized Solution for Vista Wireless Network

1. Method 1

Cancel the TPC/IPv6 protocol in "Local Area Connection" and "Wireless Network Connection". Then disable the wireless network and then enable it. See if the problem is solved?

If not resolved yet.

2. Method two.

Open the Registry Editor and find the DhcpConnForceBroadcastFlag key under HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\Interfaces\\{GUID}, change its value from 1 to 0. Then disconnect the wireless connection , then connect!

It is recommended to cancel the TPC/IPv6 protocol in "Local Area Connection" and "Wireless Network Connection".

Description of Microsoft's failure in this area:

Symptoms

Consider the following:

•You connect a Windows Vista-based computer To the network.

• Then configure the router or other device configured as a Dynamic Host Configuration Protocol (DHCP) server on the network.

• The router or other device does not support the BROADCAST flag.

In this case, Windows Vista will not be able to obtain an IP address.

Reasons

This issue is caused by design differences between Windows Vista and Microsoft Windows XP Service Pack 2 (SP2). Specifically, in Windows XP SP2, the BROADCAST flag in the DHCP Discovery packet is set to 0 (disabled). In Windows Vista, the BROADCAST flag in the DHCP Discovery packet is not disabled. Therefore, some routers or non-Microsoft DHCP servers will not be able to process DHCP discovery packets.

Solution

Warning: Serious problems can occur if you modify the registry incorrectly by using Registry Editor or by other means. These issues may require reinstallation of the operating system to resolve. Microsoft cannot guarantee that these issues will be resolved. Modifying the registry is at your own risk. To resolve this issue, disable the DHCP BROADCAST flag in Windows Vista. To do this, follow these steps:

1. Click “Start”, type regedit in the "Start Search" box, and then click “>;Program“ Regedit”.

If you are prompted for an administrator password or for confirmation, type your password or click “Continue”.

2. Locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\Interfaces\\{GUID}

In this registry path, single Click on the "GUID" sub-item that corresponds to the network adapter that is connected to the network.

3. On the "Edit" menu, point to “New”, then click “DWORD (32-bit) value”.

4. In the "New Value #1” box, type DhcpConnEnableBcastFlagToggle, and then press ENTER.

5. Right-click DhcpConnEnableBcastFlagToggle and click “Modify”.

6. In the "Value data” box, type 1, then click “OK”.

7. Close the Registry Editor.