The mystery of the Vista system in the Netcom broadband

Some areas of Netcom use DHCP to access the Internet, and the Vista operating system has a certain conflict with the DHCP server authentication of Netcom. The dialer connects to a group of authentication servers through the Netcom address at the beginning of the metropolitan area network 10, and the authentication server After the authentication is returned to the client, the client obtains a real public IP address. If the Vista system is installed, it may not be possible to obtain the address starting with 10 automatically assigned by Netcom. 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 non-Microsoft DHCP servers may not be able to process DHCP Discovery packets. (The BROADCAST flag means that the computer has the ability to broadcast packets to all hosts.)

Solution:

HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\Interfaces\\{GUID} Under the DhcpConnForceBroadcastFlag subkey, change its value from 1 to 0.