Post by Romeo on Nov 5, 2011 13:05:10 GMT -5
When a DHCP client boots up, it first looks for a DHCP server in order to obtain an IP address and subnet mask. If the client is unable to find the information, it uses APIPA (Automatic Private IP Addressing) a feature in Windows Vista to automatically configure itself with an IP address and subnet mask when a DHCP server isn't available. The IP address range is 169.254.0.1 through 169.254.255.254, a range that has been reserved especially for Microsoft.
If a Windows Vista computer fails to get an IP address from DHCP Server, then you may have to confirm if the DHCP Server supports the BROADCAST flag.
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 reedit in the Programs list. 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, click the (GUID) subkey that corresponds to the network adapter that is connected to the network.
3) On the Edit menu, point to New, and then click DWORD (32-bit) Value.
4) In the New Value #1 box, type DhcpConnEnableBcastFlagToggle, and then press ENTER.
5) Right-click DhcpConnEnableBcastFlagToggle, and then click Modify.
6) In the Value data box, type 1, and then click OK.
7) Close Registry Editor.
For more information you may refer the following link:
Windows Vista cannot obtain an IP address from certain routers or from certain non-Microsoft DHCP servers.
support.microsoft.com/kb/928233
Important: The above mentioned method tells you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs.
How to back up and restore the registry in Windows: support.microsoft.com/kb/322756/
Hope this information is helpful.
Praseetha K
Microsoft Answers Support Engineer
Visit our Microsoft Answers Feedback Forum and let us know what you think.
-----------------another easy solution --------------
setting up a router between modem and pc will fix the I.P. problem
If a Windows Vista computer fails to get an IP address from DHCP Server, then you may have to confirm if the DHCP Server supports the BROADCAST flag.
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 reedit in the Programs list. 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, click the (GUID) subkey that corresponds to the network adapter that is connected to the network.
3) On the Edit menu, point to New, and then click DWORD (32-bit) Value.
4) In the New Value #1 box, type DhcpConnEnableBcastFlagToggle, and then press ENTER.
5) Right-click DhcpConnEnableBcastFlagToggle, and then click Modify.
6) In the Value data box, type 1, and then click OK.
7) Close Registry Editor.
For more information you may refer the following link:
Windows Vista cannot obtain an IP address from certain routers or from certain non-Microsoft DHCP servers.
support.microsoft.com/kb/928233
Important: The above mentioned method tells you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs.
How to back up and restore the registry in Windows: support.microsoft.com/kb/322756/
Hope this information is helpful.
Praseetha K
Microsoft Answers Support Engineer
Visit our Microsoft Answers Feedback Forum and let us know what you think.
-----------------another easy solution --------------
setting up a router between modem and pc will fix the I.P. problem