Hi, I have a problem that im hoping someone could help me with. Setup: Windows 7 client joined to 2008 domain. Domain namn is domain.local (domain namn actually ends with .local) DNS is set up on the Active directory servers. Problem: Resolution of the domain namn (domain.local) is slow, takes about 2-3 seconds to resolve. The resolution is only slow when using for example ping, if i do nslookup the resolution is fast. If i ping host.domain.local the resolution is fast, problem only occurs with "domain.local". This slow resolution causes some domain logins to fail because of timeout. Troubleshooting: So i did some tests trying to find out what the difference was between pinging "host.domain.local"(fast) and "domain.local"(slow). Using wireshark i saw that when i ping host.domain.local i see that my client sends a request to my DNS server as i would expect. However when i ping domain.local i do not see any traffic going to my DNS servers. Instead i see that the client is trying to use mDNS(multicast DNS)/ LLMNR to resolve domain.local and this seems to be causing the delay in the resolution. So i tried disabling LLMNR in GPO, i doublechecked so that the change had reached the client with gpresult. Then i tried to ping domain.local again and got the exact same result, i check with wireshark and its still sending mDNS requests. Found this article: http://social.technet.microsoft.com/Forums/pl-PL/winserverNIS/thread/4da790f5-b453-4c1d-9ba7-d5b5c60df7a8 It states that if the domain name ends up with .local the dns client is supposed to use mDNS(LLMNR). Can someone explain these problems to me and how can i disable this behavior?

Hi, Did this issue occurs with all Windows 7 client PC? I understand that your issue is slow resolution of domain name from DNS. I suggest to perform these tests to troubleshoot the issue: 1 Start Windows 7 with Clean Boot 2 Register DNS via command: ipconfig /flushdns ipconfig /registerdns 3 Disable IPv6 If the issue persists, it’s possible that the domain.local records are not in DNS. Manually add a record for domain.local in DNS and see if it changed. This link maybe helpful to you: 10 Ways to Troubleshoot DNS Resolution Issues Please Note: Since the website is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information. Regards, Leo Huang TechNet Subscriber Support in forum. If you have any feedback on our support, please contact tngfb@microsoft.comPlease 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, Did your issue solved? Please feel free to give me any update. Thanks. Regards, Leo Huang TechNet Subscriber Support in forum. If you have any feedback on our support, please contact tngfb@microsoft.comPlease 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, As this thread has been quiet for a while, we assume that the issue has been resolved. At this time, we will mark it as ‘Answered’ as the previous steps should be helpful for many similar scenarios. If the issue still persists, please feel free to reply this post directly so we will be notified to follow it up. You can also choose to unmark the answer as you wish. BTW, we’d love to hear your feedback about the solution. By sharing your experience you can help other community members facing similar problems. Thanks for your understanding and efforts. Regards, Leo Huang TechNet Subscriber Support in forum. If you have any feedback on our support, please contact tngfb@microsoft.comPlease 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.