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How to not break NLB with network segmentation

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  • How to not break NLB with network segmentation

    Today, we have a flat network that includes two nodes in an NLB cluster (serving OWA). We want to segment our network by having our switches insert a dot1q tag into the Ethernet frames (layer 2, ARP) and not based on logical addresses. So our IP address/subnet mask won't change, traffic will be segmented by the switches on each floor identifying the traffic from that floor.

    The cluster operation mode is multicast, which (I believe) will break when we segment the network since they won't be able to talk via broadcast/ARP resolution.

    How do I keep this from breaking? I'm sure there are more details needed to give an informed answer but I only sorta understand how NLB works so I'm not sure what other details to give.

    Thanks.

  • #2
    Re: How to not break NLB with network segmentation

    What is your goal with all of this?
    Personally I would segment it into vlans but ok...

    This might give you more insight about the packets used by nlb.
    Yes, it is at the cisco website, but IMHO it's the most clearest explanation.
    http://www.cisco.com/en/US/products/...80a07203.shtml
    Marcel
    Technical Consultant
    Netherlands
    http://www.phetios.com
    http://blog.nessus.nl

    MCITP(EA, SA), MCSA/E 2003:Security, CCNA, SNAF, DCUCI, CCSA/E/E+ (R60), VCP4/5, NCDA, NCIE - SAN, NCIE - BR, EMCPE
    "No matter how secure, there is always the human factor."

    "Enjoy life today, tomorrow may never come."
    "If you're going through hell, keep going. ~Winston Churchill"

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