NLB on Biztalk Servers - For NLB Guru's only

Discussion in 'Clustering' started by Chris Henderson, Jan 12, 2006.

  1. I'm trying to setup NLB on two Biztalk servers in order to load balance the
    Web services on them through IIS. When I enable the second heartbeat
    adapter it appears that I can't connect to the SQL backend database with the
    SQL Enterprise admin client tools on the Biztalk server.

    Any help on this would be greatly appreciated.

    Thanks in advance,

    Chris Henderson, Jan 12, 2006
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  2. Rodney R. Fournier [MVP], Jan 13, 2006
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  3. This is actualy on an VM's.

    I have two servers in a BizTalk group configuration.

    2 Adapters on each server.

    One uses a dedicated connection between the new connection which I call the
    heartbeat. This is on a 10.100.x.x subnet and is for the cluster to cluster
    communication. This adapter has no NLB on gateway on it as the
    documentation suggest.

    The second, public adapter is on a 192.168.x.x address and is connected to
    the LAN. This adapter has the primary cluster IP on it also (listed under
    the dedicated IP) The NLB configuration parameters are the same on both.

    What is strange though is when I try to enable the second adapter, I cannot
    connect to the back end SQL server that BizTalk is talking to.

    The reason I'm using NLB on these servers is to load balance some IIS web
    services to mirror what we have in production. Prodution uses an F5 device.

    Thanks Rod, I hope I gave you enough information.

    Chris Henderson, Jan 13, 2006
  4. Sorry Rod, I meant to say below there is no NLB or (instead of on) gateway
    Chris Henderson, Jan 13, 2006
  5. When you wrote uses a dedicated connection - I read cross over cable. Was
    that a correct assumption? Without NLB on the dedicated connection, no
    heartbeat or cluster traffic will flow on it.

    You are trying to connect to SQL from the 192 network right? Can you ping it
    or anything on that segment?



    MVP - Windows Server - Clustering - Clustering Website - Blog - Cluster Training
    Rodney R. Fournier [MVP], Jan 17, 2006
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