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  • Exchange 2007 Front/Back End Question

    We currently run a front/back end server setup on Exchange 2000. We are moving to Exchange 2007 in the near future, however I know Ex2007 has different named roles.

    So to create a similar setup with Exchange 2007 what roles do I need for the front end and back end?

    Thanks

    Dave

  • #2
    Re: Exchange 2007 Front/Back End Question

    This is a good overview:
    http://www.msexchange.org/tutorials/...ver-Roles.html

    This too:
    http://technet.microsoft.com/en-gb/l...EXCHG.80).aspx
    cheers
    Andy

    Please read this before you post:


    Quis custodiet ipsos custodes?

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    • #3
      Re: Exchange 2007 Front/Back End Question

      Indeed Exchange 2007 has 5 server roles:
      Edge Transport server
      Hub Transport Server
      Mailbox Server
      Cleint Access server
      Unified messaging server.

      The front end like we knew it in Exchange 2003 would be a Hubtransport server along with an cleint acess server. Where the back end server would be the Mailbox server.
      [Powershell]
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      • #4
        Re: Exchange 2007 Front/Back End Question

        There is no direct replacement for FE/BE. The closet you can get is a combination of hub and CAS - but it depends on whether you were using the FE for OWA etc or also for SMTP traffic.
        However if you were using fe/be in a DMZ then that is no longer supported.

        Simon.
        --
        Simon Butler
        Exchange MVP

        Blog: http://blog.sembee.co.uk/
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        • #5
          Re: Exchange 2007 Front/Back End Question

          Thats for the info.

          Currently the SMTP traffic hits our firewall and is forwarded to our internal network to the backend server. The frontend server only handles OWA and sits in the DMZ.

          So is what Sembee is saying about FE/BE in a DMZ not support still the same? Or does that only apply if both servers are in the DMZ?

          If the first option, how would you recreate a similar setup in 2007?

          Thanks

          Dave

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          • #6
            Re: Exchange 2007 Front/Back End Question

            A server member of the domain should not sit in the DMZ, that is why MS created the Edge Transport server. The edge transport server is not part of your domain, and is in a workgroup. For OWA, OMA Outlook everywhere, MS created the CAS server. The CAS server is placed on the internal network, and not on the DMZ.
            [Powershell]
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            • #7
              Re: Exchange 2007 Front/Back End Question

              Originally posted by Killerbe View Post
              A server member of the domain should not sit in the DMZ, that is why MS created the Edge Transport server. The edge transport server is not part of your domain, and is in a workgroup. For OWA, OMA Outlook everywhere, MS created the CAS server. The CAS server is placed on the internal network, and not on the DMZ.
              Ok, so let me see if I have this correct:

              in the DMZ you have teh Edge Transport server which the OWA connects to and the requests are then forward to the CAS or Mailbox server on the internal network?

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              • #8
                Re: Exchange 2007 Front/Back End Question

                No Exchange 2007 role other than Edge is supported in the DMZ.
                Edge ONLY deals with SMTP traffic. If you want something between the Exchange servers and the internet then it can only be an ISA Server. It cannot be another Exchange server.

                Simon.
                --
                Simon Butler
                Exchange MVP

                Blog: http://blog.sembee.co.uk/
                More Exchange Content: http://exchange.sembee.info/
                Exchange Resources List: http://exbpa.com/
                In the UK? Hire me: http://www.sembee.co.uk/

                Sembee is a registered trademark, used here with permission.

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                • #9
                  Re: Exchange 2007 Front/Back End Question

                  Ah fair enough, done a small pic in case my explanation didnt sound right.

                  SMTP traffic arrives at the firewall and is forward onto the internal exchange server.

                  OWA traffic arrives at the firewall and is forward into the DMZ to the ISA server, the ISA server then forwards the OWA traffic onto the exchange cluster.

                  Have also looked at an Exchange clustering article is suggests it can only be a mailbox server and nothing else? So I would still need a 3rd server to handle the OWA and any other exchange roles?

                  Thanks

                  Dave
                  Attached Files

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                  • #10
                    Re: Exchange 2007 Front/Back End Question

                    If you are deploying any of the clustering options except LCR, then you require a minimum of three servers.

                    Simon.
                    --
                    Simon Butler
                    Exchange MVP

                    Blog: http://blog.sembee.co.uk/
                    More Exchange Content: http://exchange.sembee.info/
                    Exchange Resources List: http://exbpa.com/
                    In the UK? Hire me: http://www.sembee.co.uk/

                    Sembee is a registered trademark, used here with permission.

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                    • #11
                      Re: Exchange 2007 Front/Back End Question

                      Originally posted by Sembee View Post
                      If you are deploying any of the clustering options except LCR, then you require a minimum of three servers.

                      Simon.
                      Could you expand on the need for 3 servers as a minium and what is LCR?

                      Thanks

                      Dave

                      Comment


                      • #12
                        Re: Exchange 2007 Front/Back End Question

                        If Sembee doesn't mind:


                        2 for the cluster and 1 for the CA/HT


                        LCR = Local Continuous Replication
                        http://exchangeexchange.com/blogs/jo...tep-guide.aspx
                        cheers
                        Andy

                        Please read this before you post:


                        Quis custodiet ipsos custodes?

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                        • #13
                          Re: Exchange 2007 Front/Back End Question

                          Ok had a look at LCR and doesnt look like it will be as good for us as Active/Passive mailbox cluster.

                          From the guides I have read on the Active/Passive cluster model the Active server replicates changes to the passive server, and in the event of a failure on the active server it failovers to the passive server with no user intervention required.

                          On a different angle, is it possible to use two exchange servers to load balance? ie have both servers with identical data and when the user connects to the cluster they go to whichever server is avalible?

                          For the cluster I was looking at Dual Quad core 2.3ghz with 4gb of ram and a raid of 4 x 72gb 15k sas drives, and for the CAS server a slightly smaller quad core 1.6ghz and 2gb of ram.

                          Would this be enough hardware to support 850 mailboxes plus expansion over the next 5 years to 1500 mailboxes, and will the CAS server handle ~400 users connecting for OWA?

                          Thanks

                          Dave

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                          • #14
                            Re: Exchange 2007 Front/Back End Question

                            Don't think exchange supports load balanced MB servers (could you write to the stores from two different servers anyway?) but you can NLB the CAS and HT.



                            UPDATED: Exchange 2007 Processor and Memory Recommendations
                            http://msexchangeteam.com/archive/20...27/431644.aspx

                            Planning Storage Configurations
                            http://technet.microsoft.com/en-gb/l.../bb124518.aspx

                            Planning Processor Configurations
                            http://technet.microsoft.com/en-gb/l.../bb124518.aspx
                            cheers
                            Andy

                            Please read this before you post:


                            Quis custodiet ipsos custodes?

                            Comment


                            • #15
                              Re: Exchange 2007 Front/Back End Question

                              Andy,

                              Thanks for those links. Having looked through them I think it would be best to drop the low spec server and get a 3rd of the bigger spec. Going to add an extra 8Gb to the exchange mailbox server and go with active/passive cluster, and use the 3rd to handle all the other roles.

                              So what should happen is the Outlook users will connect directly to the exchange cluster and the OWA clients will connect to the CAS that will then pull the info from the mailbox cluster.

                              Or is it a case of all the clients connect to the CAS and then forwards requests onto the mailbox cluster?

                              Does the same apply for SMTP traffic? Sent to the CAS box then onto the cluster, or can it be sent straight to teh cluster?

                              From what I have read this should give me a high performance exchange system designed to cope with future expansion.

                              I find it amazing that the hardware needed costs 1/5th of the licencing costs involved for this project.

                              Dave

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