switch failure - what happens to cluster

Discussion in 'Clustering' started by inteq, Mar 29, 2005.

  1. inteq

    inteq Guest

    I have a two node cluster that is connected into the same physical switch and
    both public IP addresses are on the same subnet. If the switch fails will the
    cluster fail over? What will happen? If the cluster was running on node A to
    start will it stay on node A or will it fail over to B.

    Thanks in advance
     
    inteq, Mar 29, 2005
    #1
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  2. Integ

    I the case of the nodes losing network connectivity with one another you
    would basically enter a split brain scenario. The node who ownes the quorum
    resource at the time of the failure will basically assume ownership of all
    resources. The quorum resource is used as the tie breaker in these
    situations.

    The quorum is used as the tie-breaker to avoid split-brain scenarios. A
    split-brain scenario happens when all of the network communication links
    between two or more cluster nodes fail. In these cases, the cluster may be
    split into two or more partitions that cannot communicate with each other.
    The quorum is used to guarantee that any cluster resource is only brought
    online on only one node. It does this by allowing the partition that owns the
    quorum to continue, while the other partitions are evicted from the cluster.

    CT
     
    Charles Tolento, Mar 29, 2005
    #2
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  3. Inteq

    The initial answer I supplied is in the case of both the public and private
    networks failing at the same time. There are several scenarios in which
    network failure and cluster behavior can react. This article should explain
    those various scenarios.
    http://support.microsoft.com/?id=242600

    CT
     
    Charles Tolento, Mar 29, 2005
    #3
  4. inteq

    inteq Guest

    two nodes
     
    inteq, Apr 7, 2005
    #4
  5. inteq

    inteq Guest

    take two
     
    inteq, Apr 7, 2005
    #5
  6. Please review the following KB article and then let us know if you have
    specific questions:

    Network failure detection and recovery in Windows Server 2003 Clusters
    http://support.microsoft.com/kb/286342

    Regards,
    John
     
    John Toner [MVP], Apr 8, 2005
    #6
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