Win 7 clients losing networking to domain 2003 servers.
Hi, new thread on this. Symptom Win 7 Pro clients in mixed XP clients domain with 2003 r2 domain controller, randomly loses networking to 2003 R2 servers joined to domain I can't ping the 'domained' 2003 servers, and naturally all services hosted by those servers are unavailable, be it, DNS, File and Print Sharing, DB server etc. This might be pure luck at the moment, but effected Win 7 clients can network to another 2003 server which is not joined to the domain Problem started about 48/72 hours ago. Reference I had experience the same issue before back in June/May, although on a much limited scale. Now, 90% of my win 7 clients are having this issue at the same time And I've found a few similar cases across the net. Similar to what other users reported, some patch may have resolved the issues between June and now... as I've experienced the same case back then too. It was resolved, and It started back 72 hours ago. http://social.technet.microsoft.com/Forums/en-US/w7itpronetworking/thread/683cf6c7-0a6c-4063-9107-16c5c6345673 (PK's solution, is only for shared drives? I'm thinking there's a bigger problem here with the networking core in 7 itself) http://social.technet.microsoft.com/Forums/en/w7itpronetworking/thread/fc561f15-68ae-4f01-a153-e8f1338efc1e http://social.technet.microsoft.com/Forums/en-US/w7itpronetworking/thread/1a5b2905-498d-45fc-9f66-49c2236af095 http://social.technet.microsoft.com/Forums/en-US/w7itpronetworking/thread/8befacc4-6c0b-4569-9935-d0e47e691bed (Not an actual resolution, as he reimaged his server to a prior config, which doesnt resolve the issue, and not everyone can afford to reimage a live server) http://www.petri.co.il/forums/showthread.php?p=244070#post244070 http://www.win7heads.com/networking/116521-windows-7-networking-issues-server-2003-workgroup.html http://www.windowsseventips.info/windows-7-networking/cannot-ping-a-file-server-from.html Things that I did Switch, cables etc is fine, no problem with core network equipments Things that seems to help (randomly) Restarting Or unplug/replug network cable Doing the above, may restore the networking to Server A, but not Server B May restore network to both servers, or none at all. Im thinking, something in the patches? This is specifically a Win 7 problem, as ALL my XP clients do not have this problem, and never had. Please help~
August 11th, 2011 10:46pm

Hi, According to your description, I suggest you to disable both sides firewall for a test. If the issue still happens, please disable Auto-tuning and try to upgrade the driver of the network adapter to latest version. http://support.microsoft.com/kb/934430 Note: this link also applies for Windows 7. 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.
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August 15th, 2011 11:54pm

Hi Juke, thanks for the reply, but there's no firewall on the server or on my clients. Please look at another thread here. http://social.technet.microsoft.com/Forums/en-US/w7itpronetworking/thread/60558131-a8c2-46ad-8190-8854df2d2cb1/ He's having the same random issues between 7 clients and 2003 server. I wish I could get in touch with him... So that we can share more information to pinpoint what maybe the cause of this so frustrating issue! Is there a database that you could refer to, or someone else from microsoft that you can get in touch with? Or, could you provide his email contact to me, so that I could possibly, get in touch with him too? Drivers are fully updated. I have broadcom gigalan, and intel wireless. When my broadcom LAN is having the above case, I unplugged it, and turned on my Wifi, which, surprisingly is also showing the same symptoms. And I have another notebooks which is on other network card and it's still having the same issue. The only 100% works solution, is to downgrade the 7Ps back to XP Pro... As I was writing this, my connection to the server is lost for a few hours, and magically on its own. The connection is restored! Thanks
September 2nd, 2011 4:09am

Ok, seems like the ARP table maybe the cause of all this problems. Will do more testing when the problem surface again
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September 2nd, 2011 4:53am

Yes, confirmed, ARP problem. If this will help anyone out. My server's Mac address is wrongly updated in the ARP table
September 2nd, 2011 5:09am

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