Deploying DAG on Exchange 2013 Standard edition

Hi All,

I’m about to deploy 2x new Exchange Server 2013 SP1 Standard edition DAG on the Windows Server 2012 R2 VMs.

I wanted to simplify the operational management as much as possible, hence I heard in the 2013 SP1 I can deploy the DAG without witness server (Dynamic Quorum) and also IP less DAG.

Can anyone here please share some pitfalls or disadvantage that I need to know before going through the path above ?

How many vNIC per mailbox server do I need it ?

Thanks in advance.
LVL 9
Senior IT System EngineerIT ProfessionalAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

MichalCommented:
I think it can help you

http://techgenix.com/exchange-2013-dag-dynamic-quorum-part1/

http://msexchangeguru.com/2014/03/21/e2013sp1-ip-less-dag/

You should have at least two vNICs one for replication second for communication.
1
Senior IT System EngineerIT ProfessionalAuthor Commented:
ok, so is it absolute minimum to have two vNICs ?
I assume that the second vNIC should have the different non-routable VLAN ?
0
MichalCommented:
Yes you`re right.
1
Simplify Active Directory Administration

Administration of Active Directory does not have to be hard.  Too often what should be a simple task is made more difficult than it needs to be.The solution?  Hyena from SystemTools Software.  With ease-of-use as well as powerful importing and bulk updating capabilities.

Learn More
Todd NelsonSystems EngineerCommented:
With any DAG, you only need one NIC.  Performance is better with multiple NICs but only if your network has segregated VLANs with separate switches, etc.  With an IP-less DAG, you only need one NIC.

Make sure your applications, such as backup, etc., are compatible with DAGS without administrative access points (IP-less).

Regarding quorum (dynamic or otherwise), a witness server is required.  In 2013 and 2010, if a witness server was not specified Exchange would attempt to locate an Exchange non-mailbox server to assign as a witness server.  If no such server, then the creation of the DAG failed.

Take a look at the following references. Be sure to watch the associated videos as well.


Lastly, don't install Exchange 2013 SP1. CU15 is available and stable; and CU16 will be coming out this month.
1

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Senior IT System EngineerIT ProfessionalAuthor Commented:
Todd,

Thanks for sharing the knowledge more about Exchange Server 2013. So it seems it is possible to combine the two feature:

IP-less DAG with Dynamic Quorum into the solution since I'm building the OS for the mailbox server on Windows Server 2012 R2.

OK, so if I install the additional Mailbox server in a new DAG config with 2013 SP1+CU16, can I still migrate my mailboxes to the new DAG-enabled DB ?
0
Senior IT System EngineerIT ProfessionalAuthor Commented:
Regarding quorum (dynamic or otherwise), a witness server is required.  In 2013 and 2010, if a witness server was not specified Exchange would attempt to locate an Exchange non-mailbox server to assign as a witness server.  If no such server, then the creation of the DAG failed.

At the moment:
AD Site: HQ
PRODEXC01-VM - Stand Alone Mailbox + CAS

AD Site: Site-2
PRODEXC02-VM - Stand Alone Mailbox + CAS

AD Site: Site-3
PRODEXC03-VM - Stand Alone Mailbox + CAS

The proposed solution that I am building will be:

AD Site: HQ
PRODEXC01-VM - Stand Alone Mailbox + CAS
PRODEXC03-VM - Mailbox DAG1 - Member

AD Site: Site-2
PRODEXC02-VM - Stand Alone Mailbox + CAS
PRODEXC04-VM - Mailbox DAG1 - Member

AD Site: Site-3
PRODEXC03-VM - Stand Alone Mailbox + CAS

All of the mailbox DB is migrated accross to the DAG1 member. While the remaining CAS server is used for OWA & Active Sync.
0
Todd NelsonSystems EngineerCommented:
First, you do not need to install Exchange 2013 SP1 (CU4) and then the newest CU.  Because the CUs are cumulative, only the latest CU needs to be installed is you are installing a fresh server.

Second, MS strongly discourages anything but multi-role Exchange--and has since 2010.

But to answer your question, "so if I install the additional Mailbox server in a new DAG config with 2013 SP1+CU16, can I still migrate my mailboxes to the new DAG-enabled DB ?"  Yes, if you install additional Exchange servers and configure for DAG, you can move your mailboxes to the DBs hosted by the members of the DAG.

I hope that answers your question.
1
Senior IT System EngineerIT ProfessionalAuthor Commented:
Thanks guys !
0
Senior IT System EngineerIT ProfessionalAuthor Commented:
Hi Todd,

Does placement of the Exchange transaction logs must also be on the same drive letter for the DAG member ?
0
Todd NelsonSystems EngineerCommented:
The logs can be on a different drive from the databases but for a specific database must match for the other DAG members hosting that specific database.  It may be best to have them on a separate drives depending on the type of storage/RAID is being used.
1
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Exchange

From novice to tech pro — start learning today.