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High Availability for CAS Exchange 2013 over Two Subnets

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  • High Availability for CAS Exchange 2013 over Two Subnets

    Sorry to hijack the thread...
    Whats the best way of load balancing CAS (hardware) across 2 subnets?

    We will have one CAS server in one subnet and two in another..

    Thanks

  • #2
    Re: High Availability for CAS Exchange 2013 over Two Subnets

    I have split your question out to its own thread.

    It very much depends on whether the subnets are different AD sites or not.
    If they are not, then it doesn't really matter, you just need a load balancer in front, with all servers in the pool.

    However if they are in different AD sites (and that also means in most cases different physical locations) then you need to treat them as two separate CAS environments. That means a load balancer in front of the site with two CAS role holders.

    Would also point out that splitting the CAS role out isn't best practise. It isn't something I ever do, no matter the size of the environment. All roles on all servers.

    Simon.
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