How to configure Exchange 2010 in DAG with iSCSI storage

Posted on 2014-08-25
Last Modified: 2015-01-24

We purchased EMC NAS, I configured it as iSCSI storage used iSCSI initiator to configure it in my Exchange database server. One NIC interface on Exchange and NAS are facing the Network. Second NIC on both Exchange and NAS are isolated and only talking to each other (separate LAN). I was told that even if they communicate on separate networks I need to tell Exschange in DAG not to talk to NAS thru Network interface and having a hard time using the command in the shell. Just to be more specific, here are actual names of my devices
Exchange database server      RT-MBX5
DAG                                              DAG1
Storage (NAS)                   
Your input will be greatly appreciated.
Thank you in advance,

Question by:swolff1
    LVL 37

    Accepted Solution


    What you are referring to is using a separate MAPI and Replication network. This has nothing to do with iSCSI or your SAN. Ideally, you have one NIC dedicated to MAPI (client connectivity, Exchange server communication, etc.) and one NIC dedicated to DAG replication traffic.

    If you only have two NICs in your server, I recommend you dedicate one to iSCSI and use the other one as a shared MAPI/Replication network. The reason for this is that you want to ensure you always have enough bandwidth for iSCSI and you don't want your MAPI or replication traffic affecting that. Ideally, you would have three NICs then you could dedicate a NIC to each of iSCSI, MAPI, and Replication.

    To set this up in EMC, go to Organization Configuration / Mailbox / Database Availability Groups. For Networks, make sure there is only one network listed. Make sure replication is enabled and make sure only the subnet of the NIC you plan to use for MAPI/Replication is listed.


    Author Comment

    Here is my config.
    2 NICS

    IP is NIC that connects iSCSI storage.

    LVL 37

    Expert Comment

    by:Jamie McKillop
    If you only have 2 NICs, why am I seeing three networks/subnets?


    Author Comment

    Thank you for your reply. This is exactly what I did and NAS works well.
    Appreciate your recommendation.


    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    Wish Marketing would stop bothering you?

    Is your marketing department constantly asking for new email signature updates? Are they requesting a different design for every department? Do they need yet another banner added? Don’t let it get you down! There is an easy way to manage all of these requests...

    Get an idea of what you should include in an email disclaimer with these Top 5 email disclaimer tips.
    Set OWA language and time zone in Exchange for individuals, all users or per database.
    This tutorial will give a short introduction and overview of Backup Exec 2014 and the additional features that have been added over its predecessor Backup Exec 2012. As with Backup Exec 2012, the Backup Exec button in the upper left corner. From her…
    This tutorial will walk an individual through the steps necessary to install and configure the Windows Server Backup Utility. Directly connect an external storage device such as a USB drive, or CD\DVD burner: If the device is a USB drive, ensure i…

    759 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    13 Experts available now in Live!

    Get 1:1 Help Now