There is a laptop can automatically obtain IP, and other host network can ping each other, is the Ping gateway, only on the intranet, can not Sisu network, IP Exchange to other host can also Sisu network, that there is no limit on the router. The router also checked, the computer also re-installed, tossing for two days did not find out why, later on the internet for a good while, comprehensive experience, finally fix. The reason for this is that the router does not recognize the MAC address of this host, and I don't understand why I can't recognize it. Here's how. I use the Win7, just say Win7 in the settings, other systems analogy. Open local Connection--general--Properties--Network tab, the above is not SISU network network card name, point configuration-Advanced-Properties, there is a network address, select, click on the right side of the value, the original MAC address of the network card to change the first four bit to 0000, the back can be unchanged, is equal to replace the MAC address of the network card, all the way to determine, disable and then enable the local area connection, re-obtain the IP address will be able to surf the internet
Cause: It may be poisoned, ARP attack, or the router will not recognize your PC's MAC address.
FIX: Modify the MAC address, the value is changed to 0 save try
Solve the network host ping gateway can ping intranet
