Logging onto the client machine (gula) and entering: ping gula returns reply from the IPv6 address instead of the IPv4 address. All other client machines return IPv4 address. Furthermore, I cannot ping gula by IPv4 address or Name from any other machine (although Pinging 192.168.1.4 (gula) from gula works fine. I can connect to 192.168.1.4 via remote desktop. The DNS Forward lookup zone on the DNS server reports: GULA Host (A) 192.168.1.4 Similarly the DHCP server reports that 192.168.1.4 is leased to gula.domain.local. Any ideas?

Disable IPv6 on gula and you will only get IPv4 answer. This posting is provided "AS IS" with no warranties or guarantees , and confers no rights. Microsoft Student Partner Microsoft Certified Professional Microsoft Certified Systems Administrator: Security Microsoft Certified Systems Engineer: Security Microsoft Certified Technology Specialist: Windows Server 2008 Active Directory, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Applications Infrastructure, Configuration

Hello, what you see is expected behavior. As IPv6 is the future protocol IPv6 is, if configured, it will be used first when pinging a machine. If it is not configured then IPv4 will reply. Do NOT disable IPv6, instead start learning to handle it. Also Microsoft recommends to leave it enabled. http://technet.microsoft.com/en-us/magazine/2009.07.cableguy.aspxBest regards Meinolf Weber Disclaimer: This posting is provided "AS IS" with no warranties or guarantees , and confers no rights.

Right, but that doesn't solve the issue of not being able to resolve the client name?

Nevermind. Somehow file and printsharing became disabled. Problem is solved.

Hi QuinRiva, Thanks for posting here. Please try the hotfix in the article below: Resolving Internet connectivity issues on World IPv6 Day (June 8, 2011) http://support.microsoft.com/kb/2533454 Thanks. Tiger Li 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.