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DAG in Exchange 2010
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DAG in Exchange 2010 - 7.Oct.2011 5:53:04 AM
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deniscat
Posts: 4
Joined: 22.Sep.2011
Status: offline
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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
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RE: DAG in Exchange 2010 - 11.Oct.2011 10:51:21 AM
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hpeter
Posts: 1
Joined: 9.Jul.2011
Status: offline
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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?
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RE: DAG in Exchange 2010 - 20.Oct.2011 10:45:08 AM
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shanmarsh1
Posts: 139
Joined: 13.Sep.2011
Status: offline
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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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RE: DAG in Exchange 2010 - 25.Oct.2011 4:12:18 AM
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kathiny
Posts: 34
Joined: 13.Oct.2011
Status: offline
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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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RE: DAG in Exchange 2010 - 16.Nov.2011 1:43:59 AM
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af001
Posts: 2
Joined: 16.Nov.2011
Status: offline
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e. so do i
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RE: DAG in Exchange 2010 - 16.Nov.2011 10:25:34 AM
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Jesper Bernle
Posts: 912
Joined: 15.Oct.2007
Status: offline
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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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RE: DAG in Exchange 2010 - 16.Nov.2011 10:33:56 AM
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Jesper Bernle
Posts: 912
Joined: 15.Oct.2007
Status: offline
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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.
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RE: DAG in Exchange 2010 - 16.Nov.2011 10:48:00 AM
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Jesper Bernle
Posts: 912
Joined: 15.Oct.2007
Status: offline
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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.
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RE: DAG in Exchange 2010 - 16.Nov.2011 11:03:17 AM
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ermanishchawla
Posts: 125
Joined: 12.Jul.2011
Status: offline
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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.
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RE: DAG in Exchange 2010 - 13.Dec.2011 2:48:57 AM
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clementrosario
Posts: 126
Joined: 13.May2007
Status: offline
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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.
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