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  1. Google Ninja jibbajabba's Avatar
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    #1

    Default DAG Network - specify specific MAPI / Replication network ?

    Just wondering, I configured the network interfaces used by DAG according to this article

    Planning for High Availability and Site Resilience: Exchange 2010 SP1 Help

    When I check the configuration it appears that both networks using Mapi and Replication.
    I know it normally fails back any if a network becomes unavailable, but I am still curious if there is a way to specify a particular network for a particular DAG role?

    Here the output of Get-DatabaseAvailabilityGroupNetwork -Identity 'DAG-1' | fl

    Code:
    RunspaceId         : 85546da9-1e9d-4d48-8519-989ed48844d6
    Name               : DAGNetwork01
    Description        :
    Subnets            : {{192.168.32.0/20,Up}}
    Interfaces         : {{dcmbcas-1,Up,192.168.43.101}, {DCMBCAS-2,Up,192.168.43.103}}
    MapiAccessEnabled  : True
    ReplicationEnabled : True
    IgnoreNetwork      : False
    Identity           : DAG-1\DAGNetwork01
    IsValid            : True
    
    RunspaceId         : 85546da9-1e9d-4d48-8519-989ed48844d6
    Name               : DAGNetwork02
    Description        :
    Subnets            : {{85.xx.xx.0/23,Up}}
    Interfaces         : {{dcmbcas-1,Up,85.xx.xx.xx}, {DCMBCAS-2,Up,85.xx.xx.xx}}
    MapiAccessEnabled  : True
    ReplicationEnabled : True
    IgnoreNetwork      : False
    Identity           : DAG-1\DAGNetwork02
    IsValid            : True
    As far as I can see it appears that it is assigning the "role" based on the network configurations, but it clearly doesn't ... Can you "pipe" MapiAccessEnabled somehow ?
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  3. Google Ninja jibbajabba's Avatar
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    #2
    Looks like you can only use ReplicationEnabled and set it to $false, even through PS, but not for MAPI - ah well ..
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  4. New Member royal's Avatar
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    #3
    The way a network is enabled for MAPI is by having that particular's network IP Address in DNS. It is only supported to have only MAPI network thus meaning only 1 IP on a DAG member should be registered in DNS. All other networks should not be registered in DNS and should be enabled for replication.
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  5. Google Ninja jibbajabba's Avatar
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    #4
    Quote Originally Posted by royal View Post
    The way a network is enabled for MAPI is by having that particular's network IP Address in DNS. It is only supported to have only MAPI network thus meaning only 1 IP on a DAG member should be registered in DNS. All other networks should not be registered in DNS and should be enabled for replication.
    Trouble is if that particular server is a DC and DNS server as well. You can change the NICs to not updated itself in DNS, but being a DC it will still register both IPs in DNS and even more importantly (annoying) using the same hostname, hence round robin the DNS ..

    I did try to disable dynamic updates even through the registry - but it doesn't seem to work either ....
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  6. Junior Member Registered Member
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    #5

    Default you can choose to enable replication

    Hi,

    i have configer my first DAG , when u click on ur DAG at EMC u willl c at the bottom the DAG associated networks , u can click on the 1 u made for MAPI & click proprties , then remove enable replication check box & test again u will find it correct but i don't know how to disable MAPI on the network.

    Regards
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  7. Google Ninja jibbajabba's Avatar
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    #6
    Already found the solution a while ago. What network is used for what is specified by the settings on the network adapter itself. I don't have the link handy right now (iPhone) but on the planning site for DAG Microsoft specifies what exact settings are required on the NIC for what network.
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  8. New Member royal's Avatar
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    #7
    Quote Originally Posted by Marwa Egypt View Post
    but i don't know how to disable MAPI on the network.
    I answered this in my post.
    Last edited by royal; 04-18-2011 at 03:53 AM.
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  9. Google Ninja jibbajabba's Avatar
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    #8
    Quote Originally Posted by royal View Post
    I answered this in my post.
    Kinda

    Anyway, here the settings required for each specific network ... if you use the proper setting, Exchange uses the right network for either MAPI and / or Replication

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