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DAG in Exchange 2010

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DAG in Exchange 2010 - 7.Oct.2011 5:53:04 AM   
deniscat

 

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Joined: 22.Sep.2011
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Hello,

I am a newbie here and Exchange.

My boss wants me to setup a 2nd Exchange 2010 box in our corporate office. he'd like me to set something up that will make Exchange highly available to our users even if our main site fails. Eventually we will have one exchange server on each remote site (2 in corporate office). We have three sites, a corporate office, remote sites New York and California.

The corporate site is where our datacenter is located and where I'm planning to have the second exchange server. The 2 sites are New york and California.

How can I setup Exchange 2010 on each site so that even if one of any sites go down email will still be accessible to both local (corporate office) Outlook users and remote site users and OWA/Blackberry users?
I'm not sure where and how to start and go about making this all work across three sites.

Any input would be greatly appreciated.

Thanks in advance!

Dennis
Post #: 1
RE: DAG in Exchange 2010 - 11.Oct.2011 10:51:21 AM   
hpeter

 

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Joined: 9.Jul.2011
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Did you install another exchange server 2010 yet or not?

Can you access the server using remote desktop from your LAN?

Do you have any firewall installed ? If yes! is that firewall configured to let the SMTP traffic through?

(in reply to deniscat)
Post #: 2
RE: DAG in Exchange 2010 - 20.Oct.2011 10:45:08 AM   
shanmarsh1

 

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I have Storegrid 3.5 sp1 installed on a Exchange 2010 stand alone that is working great. But i'm building a new Exchange 2010 DAG

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Post #: 3
RE: DAG in Exchange 2010 - 25.Oct.2011 4:12:18 AM   
kathiny

 

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DAGs use a subset of Windows Failover Clustering technologies, namely, the cluster heartbeat, cluster networks, and the cluster database (for storing data that changes or can change quickly).

Because DAGs rely on Windows Failover Clustering, they can only be created on Exchange 2010 Enterprise Edition Mailbox servers that are running Windows Server 2008 Enterprise or Windows Server 2008 Datacenter. In addition, each Mailbox server in the DAG must have at least two network interface cards in order to be supported.

When a DAG is formed, the failover cluster that is created will initially use the Node Majority quorum mode. When the second Mailbox server is added to the DAG, the cluster quorum is automatically changes to the Node and File Share Majority quorum model. When this change occurs, the DAG will begin using the specified UNC path and directory for the cluster quorum. If the specified UNC path and directory does not exist, the Add-DatabaseAvailbilityGroupServer cmdlet will automatically create them, and provision them with full control permissions for local administrators and the CNO computer account.

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Post #: 4
RE: DAG in Exchange 2010 - 16.Nov.2011 1:43:59 AM   
af001

 

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e. so do i

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RE: DAG in Exchange 2010 - 16.Nov.2011 10:25:34 AM   
Jesper Bernle

 

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Joined: 15.Oct.2007
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quote:

ORIGINAL: kathiny

Because DAGs rely on Windows Failover Clustering, they can only be created on Exchange 2010 Enterprise Edition Mailbox servers that are running Windows Server 2008 Enterprise or Windows Server 2008 Datacenter.



This statement is wrong. The only difference between Exchange 2010 Standard and Enterprise is the number of Mailbox Databases it can host. Standard can host up to 5 databases whereas Enterprise can host up to as many as 100. So, is you want to use DAG functionality and can get by with 5 databases, Standard Edition of Exchange 2010 is fine.

< Message edited by Jesper Bernle -- 16.Nov.2011 10:29:33 AM >

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Post #: 6
RE: DAG in Exchange 2010 - 16.Nov.2011 10:33:56 AM   
Jesper Bernle

 

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Joined: 15.Oct.2007
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quote:

ORIGINAL: kathiny

In addition, each Mailbox server in the DAG must have at least two network interface cards in order to be supported.



This statement is wrong. Exchange 2010 SP1 DAGs are fully supported with only 1 NIC.

Some interesting reading regarding the question of One or two NICs.

(in reply to kathiny)
Post #: 7
RE: DAG in Exchange 2010 - 16.Nov.2011 10:48:00 AM   
Jesper Bernle

 

Posts: 912
Joined: 15.Oct.2007
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quote:

ORIGINAL: deniscat

Hello,

I am a newbie here and Exchange.

My boss wants me to setup a 2nd Exchange 2010 box in our corporate office. he'd like me to set something up that will make Exchange highly available to our users even if our main site fails. Eventually we will have one exchange server on each remote site (2 in corporate office). We have three sites, a corporate office, remote sites New York and California.

The corporate site is where our datacenter is located and where I'm planning to have the second exchange server. The 2 sites are New york and California.

How can I setup Exchange 2010 on each site so that even if one of any sites go down email will still be accessible to both local (corporate office) Outlook users and remote site users and OWA/Blackberry users?
I'm not sure where and how to start and go about making this all work across three sites.

Any input would be greatly appreciated.

Thanks in advance!

Dennis


It is possible to achieve this but it takes both good knowledge of the inner workings of both DAGs and Load Balancing and some careful planning, so if your up to the challange fine, but my recommendation is to hire an Exchange Server consultant with good knowledge in designing High Availability in Exchange 2010.

(in reply to deniscat)
Post #: 8
RE: DAG in Exchange 2010 - 16.Nov.2011 11:03:17 AM   
ermanishchawla

 

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Joined: 12.Jul.2011
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quote:

ORIGINAL: Jesper Bernle

quote:

ORIGINAL: kathiny

Because DAGs rely on Windows Failover Clustering, they can only be created on Exchange 2010 Enterprise Edition Mailbox servers that are running Windows Server 2008 Enterprise or Windows Server 2008 Datacenter.



To add to this all you need is Window server 2008 Enteprise Edition not Exchange 2010 Enterprise
This statement is wrong. The only difference between Exchange 2010 Standard and Enterprise is the number of Mailbox Databases it can host. Standard can host up to 5 databases whereas Enterprise can host up to as many as 100. So, is you want to use DAG functionality and can get by with 5 databases, Standard Edition of Exchange 2010 is fine.

(in reply to Jesper Bernle)
Post #: 9
RE: DAG in Exchange 2010 - 17.Nov.2011 5:22:49 AM   
Jesper Bernle

 

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Joined: 15.Oct.2007
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quote:

ORIGINAL: ermanishchawla

quote:

ORIGINAL: Jesper Bernle

quote:

ORIGINAL: kathiny

Because DAGs rely on Windows Failover Clustering, they can only be created on Exchange 2010 Enterprise Edition Mailbox servers that are running Windows Server 2008 Enterprise or Windows Server 2008 Datacenter.



This statement is wrong. The only difference between Exchange 2010 Standard and Enterprise is the number of Mailbox Databases it can host. Standard can host up to 5 databases whereas Enterprise can host up to as many as 100. So, is you want to use DAG functionality and can get by with 5 databases, Standard Edition of Exchange 2010 is fine.

To add to this all you need is Window server 2008 Enteprise Edition not Exchange 2010 Enterprise




I thought that was what I was saying.

(in reply to ermanishchawla)
Post #: 10
RE: DAG in Exchange 2010 - 12.Dec.2011 5:03:09 AM   
rahulrao9

 

Posts: 25
Joined: 30.Nov.2011
From: INDIA
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May be these links help you to find a solution

http://technet.microsoft.com/en-us/library/bb123889(EXCHG.140).aspx
My thoughts goes towards SSL offloading. Just check on that if it is properly configured.
Also check on IIS settings.

Also check on these links
http://technet.microsoft.com/en-us/library/bb124149.aspx
http://technet.microsoft.com/en-us/library/bb430792.aspx
http://technet.microsoft.com/en-us/library/bb123513.aspx

Hope it helps to get few trouble shooting Ideas

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(in reply to deniscat)
Post #: 11
RE: DAG in Exchange 2010 - 12.Dec.2011 5:58:19 AM   
rahulrao9

 

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From: INDIA
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Oops wrong thread sorry

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Post #: 12
RE: DAG in Exchange 2010 - 13.Dec.2011 2:48:57 AM   
clementrosario

 

Posts: 126
Joined: 13.May2007
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Hi Dennis,

Configure DAG and enable Datacenter Activation Mode

It helps to prevent from splitbrain syndrome, This site based redundancy helps users  to access the mail even if one site goes down.

(in reply to deniscat)
Post #: 13

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