NLB erro

Dear Support team, I have two server and NLB is installed on them.

Everything was working fine until one day i got this error message and I don't know why.

Now I can find my two servers under my cluster, and also can't ping the between two servers using IP or Name!!!

Both server are on same switch and both can ping domain server, Firewall is off and there is no antivirus to block any traffic.

can you please advice on how to return NLB the way it was installed...?


August 28th, 2015 7:26pm

Hi Mhmood Hamooda,

From the current description, if do not adjust any NLB configuration and this behavior occur it most possible is the switch issue, please refer the following KB to realize the details about the unicast switch configuration requirement.

The related KB:

Network Load Balancing with Network Hardware Switches

https://technet.microsoft.com/en-us/library/Cc962174.aspx

More information:

Unicast NLB nodes cannot communicate over an NLB-enabled network adaptor in Windows Server 2003

https://support.microsoft.com/en-us/kb/898867

Cannot access the virtual or dedicated IP address of an NLB node (Guest) running in Unicast Mode on Windows Server 2008 R2 Hyper-V

http://blogs.technet.com/b/networking/archive/2010/02/12/cannot-access-the-virtual-or-dedicated-ip-address-of-an-nlb-node-guest-running-in-unicast-mode-on-windows-server-2008-r2-hyper-v.aspx

Im glad to be of help to you!

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August 31st, 2015 11:22pm

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