What Is My Microsoft Exchange Mailbox Name Holders' title='What Is My Microsoft Exchange Mailbox Name Holders' />Creating a two node Exchange 2.DAGIntroduction. Im not sure how you got sucked into reading this post, but since youre here I might as well tell you how to make your Exchange 2.Mailbox role deployment highly available by using a Database Availability Group and Im going to shorten that to DAG because its a nightmare to type.Lets get rockin. Before we get too deep into it, lets first make sure youre on the right plane.This flight will take you through configuring a DAG in Exchange 2.Mailbox role highly available.In a later post I will be covering how to make your Exchange 2.Mailbox role deployment site resilient by adding additional nodes in a remote location.If youre still with me, buckle your seatbelt and keep your hands inside the cabin at all times.Server Safety Check.Before we can take off, we need to do a pre check routine on all our servers because the last thing we want is to get cruising at 3.Lets discuss the operating system requirements.Operating System.DAGs utilize Windows Failover Clustering so youre going to need a Windows OS that supports that and since Exchange 2.Server 2. 01. 2 and Server 2.R2 SP1, well focus on those.If youre running 2.R2, youll want Enterprise or Datacenter.If youre running Server 2.Standard or Datacenter.Theres nothing worse than installing Exchange only to find that you put the wrong OS on there when you go to configure the DAG.Just in case youre wondering, Microsoft does not support upgrading the OS once Exchange has been installed so your only option is to uninstall Exchange, install the correct OS, and then reinstall Exchange or build a new server with the correct OS.After youve got the correct OS, youll want to install the most current updates.Lets talk about NICs, man The Network.DAGs need to replicate and clients need to connect, so its only natural that youd need two NICs to create a DAG.Microsoft supports a single NIC but its recommended you use two so you can separate the replication traffic from the client traffic.You dont want the reseeding of a database to affect your users experience.Lets talk about the two NICs real quick.The first thing I like to do is name them appropriately.I usually name my replication NIC REPL and my client NIC MAPI, that way theres no confusion in this next step I take, and thats to put them in the correct binding order.The MAPI NIC needs to be listed first.This is how you do that.From the command prompt, type in NCPA.CPL to open up the Network Connections screen.Press the Alt key and that will display the File menu, then click on Advanced and select Advanced SettingsOn the Adapters and Bindings tab, order the adapters so that MAPI is first and REPL is second.Note If youre using network teaming, ensure the MAPI team is listed first and the REPL team is listed second.Quick note about Network Teaming.Im a fan of it because I dont want a NIC failure to cause a database failover.NIC teaming is supported on client and replication networks but you have to configure each team so that only one NIC in the team is up and the other NIC is in standby, which means ActivePassive.HP calls this Network Fault Tolerant only NFT and its a property of the team.Not sure what other server manufacturers call it because I only work on real servers Kidding, calm down.If you browse the Microsoft article that lists the new features in Microsoft Exchange Server 2010 SP2 Whats New in Exchange 2010 SP2, youll find.Last thing I want to point out is the IPv.NIC. Everywhere I go I see admins unchecking this box because they dont support IPv.First point is, unchecking that box doesnt truly disable IPv.Second point is, if youre having issues with Exchange connectivity, chances are having the checkbox checked is not your issue.Lastly, Microsoft does not test Exchange with that box unchecked, so technically youre in an unsupported configuration by unchecking it.All that was said to say, leave it alone even though you really, really want to uncheck it. Adobe Acrobat X Javascript Examples Code . Lets focus on the Client network NIC.Client Network. This is the highlander of NICs because it gets it all, default gateways, DNS settings, and priority, and there can only be one Youll configure this just like you would any other NIC card for a server.Replication Network.The replication network needs to be on a different subnet than the client network or the DAG wont see them as two separate networks, obviously.For this post, I used 1.Introduction. Im not sure how you got sucked into reading this post, but since youre here I might as well tell you how to make your Exchange 2013 Mailbox role.MS Paint, the first app you used for editing images, will probably be killed off in future updates of Windows 10, replaced by the new app Paint 3D.Microsoft lists. Hello.I have several Outlook 2010 clients who are not able to see images in emails coming from Constant Contact.The message The image cannot be.MAPI network and 1.If you have a separate network for backups or administration, I would use that.I wouldnt create a dedicated network just for Exchange replication unless you have to.DAG replication networks can share.It learned how to in kindergarten.If you want to use more than one replication network, then each replication network will need to be on different subnets as well.There are a few things you need to do with this network.Lets go through that because you get to uncheck stuff, just not the IPv.From a command prompt, type in NCPA.CPL to open the Network Connections window.Right Click the Replication NIC and go to Properties.Uncheck Client for Microsoft Networks and File and Print Sharing for Microsoft Networks.Select IPv. 4 and click Properties.Input your IP Address and Subnet mask.Do NOT put in a Default Gateway or DNS servers.Click on AdvancedClick on the DNS tab and deselect Register this connections addresses in DNSClick on the WINS tab and select Disable Net.BIOS over TCPIPWow that was a lot of steps.Ensure you click Ok to save all that crapAlright, weve got our servers ready for the DAG, now its time to install Exchange.If you need help doing that, Ive covered how to install Exchange on Server 2.HERE. Go ahead and knock that out.Ill wait. Creating the DAGNow the real fun begins We get to create stuff.Lets open up the Exchange Admin Center EAC and click on Servers database availability groups.As you can see I already have a DAG but dont worry, I didnt get started without you.Im going to create another one cleverly named DAG0.Click on the sign so we can create a new DAG.In the new database availability group windows, Youll give this a name, pick a witness server and give it an IP.Lets talk about each of those real quick.DAG Name. This name needs to be unique in the environment because once you join the first server to the DAG, a Cluster Name Object CNO will be created in Active Directory with this name.This CNO can be pre staged, meaning you can create it manually before Exchange does.You might want to do that in scenarios where you dont have rights to create Computer objects in Active Directory.At the time Im writing this, Technet states that in Exchange 2.RTM if youre DAG members are running 2.CNO, but my testing has proven otherwise.Regardless, stay on the safe side and pre stage the CNO if youre OS is 2.Here is the link to a good blog by the Exchange team that covers pre staging the CNO.Pre Staging CNO. Its for Exchange 2.Witness Server. You have to pick a server to host a share for the DAG.This share is only needed when there is an even number of nodes in the DAG, and its not utilized until you need it to maintain quorum.Ill explain that in more detail in my Nerd Knowledge section below.Skip it if you dont care.If you plan to have an odd number of nodes in your DAG you have to configure it regardless because Exchange will use it to adjust the quorum configuration automatically as you add and remove nodes from your DAG.The next question is, Jerrid, who should I give the honor of being the witness to Good question Well, if you are separating your CAS and Mailbox roles out, pick a CAS server.In fact, if you leave the witness server blank and there is a CAS server in that site, Exchange will automatically pick it.If youre not separating out the roles, then you have to pick a server.A good candidate would be a server thats not going to be rebooted a lot but I wouldnt have a dedicated witness server, its a waste of resources, so pick an existing file server or a server thats within your area of control.Before you decide to pick a Domain Controller, review the witness bullet points below.
|
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |