Dear all, In Windows 2003 Cluster, when I unplug network cable (public connection), it can switch over to other node. However, It seems that it is not working under windows 2008 (google search and someone said it is normal in 2008....). I found none of offical documentation on the guideline about Cluster failover test in Windows 2008. Can anyone give me some suggestion on it? Thanks. Thomas

Do you have "Allow cluster network communication on this network" selected in the networks section of failover cluster manager for the public interface? If not, this could be the problem... blog TinyInt.Com | work Logicworks.Net

ThomasTse, If the public cable is pulled, the IP's associated with clusterresources becomes unavaible, this triggers the name to be unavailble and hence the whole thingy should failover. I believe this is still the case with Windows 2008. However in 2008 there is a setting somewhere who controls how many failovers you can do in a give time. It's dangerous during testing as at certain point it won't failover due to the limit being reached. The setting is reachable, i think on the properties of the cluster or resources, as a "hyperlink" instead of a buttong one of the tabs. Somewhere close to where you set all the other parameters regarding number of failovers/prefered owners/..http://setspn.blogspot.com

yes, I do so. both Private and Public checked on it.

Would it be possible for you to post your cluster log? However it would be best to only include the portion from a few seconds prior to cable unplugged to a few seconds after the cable is unplugged since it is so verbose... You will have to follow the instructions here to export the log: http://blogs.technet.com/b/pfe-ireland/archive/2008/07/04/windows-2008-clustering-the-cluster-log.aspx More info about exporting the log is here: http://blogs.msdn.com/b/clustering/archive/2008/09/24/8962934.aspxblog TinyInt.Com | work Logicworks.Net

If all tests are passed during cluster installation, should it work fine? And, really no articles about failover test? Thanks.

Hi, Please check the following link. Step-by-Step Guide for Testing Hyper-V and Failover Clustering http://www.microsoft.com/downloads/details.aspx?FamilyId=CD828712-8D1E-45D1-A290-7EDADF1E4E9C&displaylang=en Best Regards, Vincent Hu

For public, "Allow the cluster to use this network" & Allow Clients to connect through this network" have been checked. For private, only " "Allow the cluster to use this network" is checked.

If you power both nodes than, then cold start them up again. Does it then work once as expected?http://setspn.blogspot.com

If I power off / reboot one of them, it can failover to another node.

Plz try my original suggestion: However in 2008 there is a setting somewhere who controls how many failovers you can do in a give time. It's dangerous during testing as at certain point it won't failover due to the limit being reached. The setting is reachable, i think on the properties of the cluster or resources, as a "hyperlink" instead of a button on one of the tabs. Somewhere close to where you set all the other parameters regarding number of failovers/prefered owners/..http://setspn.blogspot.com

any suggested settings? I will try on it.

I tried fail-over test. Server 1 can failover to Server 2 when network unplugged at server 1. However, it can't failover when server 2 's network disconnected. anyone can help what is the problem?

To be more precise, the settings I was referring too: Open Failover Cluster Manager Right click your cluster (the thing ABOVE "services and applications") Choose properties In the general tab, in the right under corner this is a hyperlink "manage core cluster resources group". click it There is a tab with some failover settings: play with the "maximum failures" in the "specified period". Defaults is 2 times in 2 hours. You could set it too 4,5 or more times in 2 hours just for testing. If this doesnt solve your issue. Id go trippelchecking/comparing both nodes to found out whether they are configured identically. Or dig in the log Windows 2008 Clustering & the Cluster Loghttp://setspn.blogspot.com

Thanks and after that setting apply, failover from 1 to 2 and 2 to 1 is successful. One more question here, if it is in fail status, any sideback effect will be produced? Thanks.