NLB Windows 2008

Posted on 2009-04-27
Last Modified: 2012-06-27

I am setting up network load balancing on two Windows 2008 64bit VMs.  They both have two NICs.  I have set it up ok and can see a test default.htm.  If I disable the NIC on one then it goes to the other and visa versa.  This is all great.

My problem is when I bring the disabled machine back on line (by re-enabling the NIC in this test) it seems to make both the nodes unavailble for at least 15 minutes.  Is this normal behaviour?  It fails over really quickly so I don't understand why bringing the disabled machine back up again causes the NLB to stop working for so long.

Question by:TomMonkey

    Author Comment

    Just an extra thing...

    When I open the NLB Manager on one of the servers I can see both hosts.  However on the other server i can only see the local host.  It gives an error 0x80070721 whhile trying to connect to the other host.
    LVL 19

    Expert Comment

    by:vmwarun - Arun

    Author Comment

    Thanks for that link.  That's good to know and wasn't on technet.

    It didn't seem to fix my problem though.  I still get the 0x80070721 error on one of the hosts...

    Accepted Solution

    I found the problem.

    The web servers were set up for using Kerberos as they are going to be SharePoint web front ends.  One of the machines was trusted for delegation but the other wasn't.  I made them both trusted and it works fine now.


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