Just a quick blog and reminder for something I worked a couple of months ago, or even longer and it took a considerable amount of time to figure out. Then last week a colleague just ping me with a question about a case they have been dealing for quite sometime.

成都创新互联专业为企业提供曲靖网站建设、曲靖做网站、曲靖网站设计、曲靖网站制作等企业网站建设、网页设计与制作、曲靖企业网站模板建站服务，10多年曲靖做网站经验，不只是建网站，更提供有价值的思路和整体网络服务。

Upon trying to join a second DAG member, in a virtualized Hyper-V environment, the following error message is presented:

“WriteError! Exception = Microsoft.Exchange.Cluster.Replay.DagTaskOperationFailedException: A server-side database availability group administrative operation failed. Error The operation failed. CreateCluster errors may result from incorrectly configured static addresses. Error: An error occurred while attempting a cluster operation. Error: Cluster API ‘”AddClusterNode() (MaxPercentage=100) failed with 0x5b4. Error: This operation returned because the timeout period expired”‘ failed.. —> Microsoft.Exchange.Cluster.Replay.AmClusterApiException: An Active Manager operation failed. Error: An error occurred while attempting a cluster operation. Error: Cluster API ‘”AddClusterNode() (MaxPercentage=100) failed with 0x5b4. Error: This operation returned because the timeout period expired”‘ failed. —> System.ComponentModel.Win32Exception: This operation returned because the timeout period expired”

If you look at the cluster logs you would notice the heartbeat failing on port UDP 3343.

Obviously you need to go by the normal troubleshooting steps of network connectivity and firewall rules. If everything seems right, and as my friend pointed out all knobs were turned and he was ready to give up. That’s when I asked…

Have you disabled TCP/UDP Checksum offload on both host and guest network cards ?

After disabling these options on both guest and parent partition cluster could be formed without any issues.

So in this case, after you make sure the obvious have been checked out and you still cannot join your cluster nodes in a virtual environment, take a look at the NIC properties for TCP/UDP Checksum Offload for IPv4 and IPv6.

另外有需要云服务器可以了解下创新互联scvps.cn，海内外云服务器15元起步，三天无理由+7*72小时售后在线，公司持有idc许可证，提供“云服务器、裸金属服务器、高防服务器、香港服务器、美国服务器、虚拟主机、免备案服务器”等云主机租用服务以及企业上云的综合解决方案，具有“安全稳定、简单易用、服务可用性高、性价比高”等特点与优势，专为企业上云打造定制，能够满足用户丰富、多元化的应用场景需求。

分享名称：DAGNodeJoinFail-创新互联
链接URL：http://pwwzsj.com/article/dedejd.html