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why DBs failover everyday?

    Question

  • Exchange 2010 SP1

    one forest and one domain

    one DAG with 4 members:cluster with node & file share majority; witness share \\cas1\dag01.it.local
     alternative wit share \\cas3\dag01.it.local
     
    produciton site 1: 2 MBX servers MBX1 and MBX2 and one cas array with 2 cas/hub servers cas1 and cas2;
    Network: 2NICs for each MBX- one for MAPI (public)
                   - one for Replication between these two MBX  servers (private- only these two communicates  each other)
    12 databases - 6 active on MBX1 and 6 active on MBX2

    Site 2: one MBX server -MBX3 and cas/hub cas3
    Hold 12 DB copies
    1 NIC - for MAPI and replication(public)

    Site3:  one MBX server -MBX4 and cas/hub cas4
    Hold 12 DB copies
    1 NIC - for MAPI and replication(public)

    --------------------
    It seems that DB failovers to MBX3 at site2 everyday due to lost communication with other nodes.  The cluster service terminated on these two nodes MBX1 and MBX2. I have to move them back to MBX1 and MBX2 everyday.

    see the screen shot of event log on MBX1.

    How should I trouble shoot this? Could the private NIC for replication on MBX1 and MBX2 cause this? ???

    Thank you for your help.

     


     

    Friday, March 09, 2012 8:50 PM

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