Hi there, Few month ago I've met with strange symptoms on domain user's machine. Unexpectedly NIC with DHCP ip lose internet and some network resources. This PC can ping domain IPs without problem, but almost can't ping for example google.com, router or PCs outside domain. > ping google.com Request timed out. Request timed out. Request timed out. Reply from 74.125.224.177: bytes=32 time=171ms TTL=52 Reply from 74.125.224.177: bytes=32 time=166ms TTL=52 Reply from 74.125.224.177: bytes=32 time=165ms TTL=52 Request timed out. Request timed out. Request timed out. Request timed out. Request timed out. Reply from 74.125.224.177: bytes=32 time=165ms TTL=52 Request timed out. Request timed out. Router's ping the same. Ping from domain PC to 192.168.10.106 bad, but ping from domain outside PC to 192.168.10.106 - OK. As only I'll change IP from DHCP to another static IP problem will gone. >ipconfig /all Windows IP Configuration Host Name . . . . . . . . . . . . : Test2-PC Primary Dns Suffix . . . . . . . : domain.local Node Type . . . . . . . . . . . . : Hybrid IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . : No DNS Suffix Search List. . . . . . : domain.local Ethernet adapter Local Area Connection 4: Connection-specific DNS Suffix . : domain.local Description . . . . . . . . . . . : Microsoft Virtual Machine Bus Network Ada pter #3 Physical Address. . . . . . . . . : 00-15-5D-0A-08-23 DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes IPv4 Address. . . . . . . . . . . : 192.168.10.106(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.0 Lease Obtained. . . . . . . . . . : Monday, March 28, 2011 10:22:40 AM Lease Expires . . . . . . . . . . : Tuesday, March 29, 2011 10:22:35 AM Default Gateway . . . . . . . . . : 192.168.10.254 DHCP Server . . . . . . . . . . . : 192.168.10.10 DNS Servers . . . . . . . . . . . : 192.168.10.10 Primary WINS Server . . . . . . . : 192.168.10.10 NetBIOS over Tcpip. . . . . . . . : Enabled Tunnel adapter isatap.{29FD9547-DF51-41DD-8118-45D7B190C2C6}: Media State . . . . . . . . . . . : Media disconnected Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Microsoft ISATAP Adapter Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0 DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes Tunnel adapter isatap.domain.local: Media State . . . . . . . . . . . : Media disconnected Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Microsoft ISATAP Adapter #2 Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0 DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes How to fix this problem?

Hi, Thanks for posting in TechNet forum. Please check if the DHCP Client service is started. Click Start, input services.msc, press Enter. On the right pane, find the DHCP Clent, set it to Automatic. Then try the following steps to troubleshoot the problem. 1. Switch the specified adapter from a static address to DHCP. Run cmd as administrator, input this command: netsh interface ip set address Local Area Connection" dhcp 2. DHCP Client must have a unique IP Address on network. Are there any IP address conflicts? 3. Try to reset TCP/IP. Refer to: How to reset Internet Protocol (TCP/IP) Regards, Miya TechNet Subscriber Support in forum. If you have any feedback on our support, please contact tngfb@microsoft.comThis posting is provided "AS IS" with no warranties, and confers no rights. | Please remember to click "Mark as Answer" on the post that helps you, and to click "Unmark as Answer" if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Hi Miya, netsh interface ip set address "Local Area Connection 4" dhcp replies that DHCP is already enabled . I've tried to restart DHCP client service - nothing changed. On DHCP server in Managed Authorized Servers I see: pdc.domain.local 192.168.1.10 and veryoldserver.domain.local 192.168.1.1 It's strange, because IP of this server is 192.168.10.10 NetScan software shows me Maybe I should authorize this server with 192.168.10.10? How can DHCP works without it?

Hi, You can try to authorize this DHCP server 192.168.10.10 in AD. Refer to here: http://technet.microsoft.com/en-us/library/cc759688(WS.10).aspx Regards, Miya TechNet Subscriber Support in forum. If you have any feedback on our support, please contact tngfb@microsoft.comThis posting is provided "AS IS" with no warranties, and confers no rights. | Please remember to click "Mark as Answer" on the post that helps you, and to click "Unmark as Answer" if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Hi, How's going? Please feel free to give us any update. Regards, Miya TechNet Subscriber Support in forum. If you have any feedback on our support, please contact tngfb@microsoft.comThis posting is provided "AS IS" with no warranties, and confers no rights. | Please remember to click "Mark as Answer" on the post that helps you, and to click "Unmark as Answer" if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

I've unauthorized old servers ffrom PDC server and added correct one. Also Autofix ( How to reset Internet Protocol (TCP/IP)) has been applied. Looks like problem gone. Thanks