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Setting up CAS arrat

Posted on 2012-09-05
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I am trying to setup a CAS array in our test environment.   I have 2 exchange servers but running CAS.  I installed Network Load Balancing feature on both Exchange servers.  I added a DNS entry for CAS array.

On the NLB Manger I receive an error at the end of the cluster setup (see screen shot).  What I am doing wrong?  EXDAG1 is one of exchange server name.  The IP address of the cluster array is 192.169.1.70.
nlberror.jpg
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Question by:FundFire
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Adam Brown earned 2000 total points
ID: 38368732
You can't run Cluster Services and NLB on the same server. If you have all roles installed on both servers and you want to use a DAG and CAS array, you will have to purchase a hardware load balancer. Otherwise, if you only have CAS or CAS/HUB installed on the servers, remove cluster services from the server and try again.
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by:Adam Brown
ID: 38368748
To clarify, Cluster Services is used by Exchange to enable DAG functionality, so if you have an Exchange Server that is going to be a DAG member, you can't also install and use the Network Load Balancing feature on that server. If you want to make use of DAG and have a CAS array, you either have to separate the CAS roles to different servers than the Mailbox roles and install NLB on those servers or make use of a Hardware Load Balancer device.
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by:FundFire
ID: 38368757
Thanks.
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