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Windows Server 2003 Network Load Balanced Traffic Flow RRS feed

  • Question

  • I've setup a two server environment that is Network Load Balanced, and currently running an HTTP Application.

    My question is, while we are monitoring the traffic using a packet analyser, I've noticed that I've got data coming into the private network connection that is addressed for the Load Balanced address, the virtual IP.

    Each of the two servers have 2 NIC's, one configured for the Load Balancing, and the other for Management.

    The NLB is setup to use Multicast.

    I've got the following:

    Svr1
        NIC 1
    10.10.10.1 - Load Balanced Virtual IP
    10.10.10.2 - Load Balanced dedicated IP
        NIC 2
    10.10.10.4 - Private connection IP

    Svr2
        NIC 1
    10.10.10.1 - Load Balanced Virtual IP
    10.10.10.3 - Load Balanced dedicated IP
        NIC 2
    10.10.10.5 - Private connection IP

    What I've noticed is traffic that for 10.10.10.1 is coming in to 10.10.10.4 and 10.10.10.5

    Anyone got any ideas on why this is?  I've never looked at the traffic flow of NLB before, is this a common occurance, or have I set something up wrong?

    My query runs further, as I want to be able to set this environment up to have the incoming for 10.10.10.1 come into the NIC1 and then go out the NIC2.  Is this something that is possible using NLB?

    If I've failed to explain something enough, let me know and I'll ellaborate.

    Thanks,

    Sid
    • Moved by Max Wang_1983 Thursday, April 28, 2011 12:56 AM forum consolidation (From:Networking)
    Friday, May 22, 2009 4:35 PM

Answers

  • I think the problem was due to the switches that were being used.

    I managed to create the environment as above in a Virtual system and it worked as expected.

    Using subnets I was then able to get the traffic flowing as desired.

    If you have any questions, let me know.

    Sid

    • Marked as answer by Sid351 Wednesday, June 3, 2009 11:36 AM
    Wednesday, June 3, 2009 11:36 AM