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Exchange 2010 DAG cluster with only 2 servers including CAS array no NLB, supported? RRS feed

  • Question

  • i want to setup an Exchange 2010 DAG cluster with two typical EX2010 installation.

    both of the servers setup with Hub Transport Role, Mailbox Role inc DAG, and CAS role

    i made an CAS array of both servers with the DAG Virtual IP address

    for MAPI traffic it is working correctly, and after SP1 rollup 2 Public folder failover is "working

     

    but my main question is, is this an supported configuration

    CAS array without any method of LB?

     

    Monday, January 23, 2012 3:23 PM

Answers

  • That wont give you load balancing though will it? The DAG Cluster IP is referencing only one server at one time so all clients will use the same CAS.

    As for supportability, I doubt that its supported- specifically - I am referring to using the Cluster IP as a connection point for the mapi clients. If not supported than certainly not recommended though It will work, yes  :)

     

     

     

     

     

    • Marked as answer by Gavin-Zhang Wednesday, February 8, 2012 1:56 AM
    Monday, January 23, 2012 6:31 PM
    Moderator
  • The DAG IP address is for the DAG only, so at a guess I don't think that is a supported configuration.

    Normally you would point the CAS array at either server, and then change the DNS entry, or put an additional IP address on to the server and then move that in the event of a failover.

    However this is the first time I have heard of such a configuration, and it isn't something I have seen written anywhere. I can only guess it is working because the IP address is bound to the server.

    Simon.


    Simon Butler, Exchange MVP
    Blog | Exchange Resources | In the UK? Hire Me.
    • Marked as answer by Gavin-Zhang Wednesday, February 8, 2012 1:56 AM
    Monday, January 23, 2012 6:45 PM

All replies

  • That wont give you load balancing though will it? The DAG Cluster IP is referencing only one server at one time so all clients will use the same CAS.

    As for supportability, I doubt that its supported- specifically - I am referring to using the Cluster IP as a connection point for the mapi clients. If not supported than certainly not recommended though It will work, yes  :)

     

     

     

     

     

    • Marked as answer by Gavin-Zhang Wednesday, February 8, 2012 1:56 AM
    Monday, January 23, 2012 6:31 PM
    Moderator
  • The DAG IP address is for the DAG only, so at a guess I don't think that is a supported configuration.

    Normally you would point the CAS array at either server, and then change the DNS entry, or put an additional IP address on to the server and then move that in the event of a failover.

    However this is the first time I have heard of such a configuration, and it isn't something I have seen written anywhere. I can only guess it is working because the IP address is bound to the server.

    Simon.


    Simon Butler, Exchange MVP
    Blog | Exchange Resources | In the UK? Hire Me.
    • Marked as answer by Gavin-Zhang Wednesday, February 8, 2012 1:56 AM
    Monday, January 23, 2012 6:45 PM
  • thank you for the answers!
    Friday, August 31, 2012 7:19 AM