how to enable dead gateway detection
To enable dead gateway detection, set the registry value EnableDeadGWDetect under HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip\Parameters to 1. To disable dead gateway detection, set the registry value to 0.or example, when the active default gateway points to the Internet and dead gateway detection switches the active default gateway to the intranet default gateway, DNS-based name resolution for Internet names and Internet-based connections can fail.