Upgrade Server 2003

Discussion in 'Server Migration' started by JN, Nov 27, 2009.

  1. JN

    JN Guest

    Hi
    we have Windows server 2003 as a domain controller.
    Now we want to install Windows 2008 on this computer an use it as domain
    controller.
    Can we run installation over installed 2003 server to keep setings and domain.
    I am not suhe wether is it good idea.
    JN
     
    JN, Nov 27, 2009
    #1
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  2. Hello JN,

    Yes, you can do it. But personal i am against inplace upgrades to new OS
    versions. Better choose an additional server and start fresh.

    For the latter see here:
    !!!NEVER START BEFORE HAVING CREATED AND TESTED A BACKUP OF YOUR DATA/MACHINE!!!

    - Do you use any kind of Exchange in the 2003 domain? If yes, which one?

    - On the old server open DNS management console and check that you are running
    Active directory integrated zone (easier for replication, if you have more
    then one DNS server)

    - run replmon from the run line or repadmin /showrepl(only if more then one
    DC exist), dcdiag and netdiag from the command prompt on the old machine
    to check for errors, if you have some post the complete output from the command
    here or solve them first. For this tools you have to install the support\tools\suptools.msi
    from the 2003 installation disk.

    - run adprep /forestprep and adprep /domainprep and adprep /rodcprep from
    the 2008 installation disk against the 2003 schema master(forestprep) / infrastructure
    master(domainprep/rodcprep), with an account that is member of the Schema/Enterprise/Domain
    admins, to upgrade the schema to the new version (44) or 2008 R2 (47)

    - you can check the schema version with "schupgr" or "dsquery * cn=schema,cn=configuration,dc=domainname,dc=local
    -scope base -attr objectVersion" without the quotes in a command prompt

    - Install the new machine as a member server in your existing domain

    - configure a fixed ip and set the preferred DNS server to the old DNS server
    only, think about disabling IPv6 if you are not using it, some known problems
    exist with it. Follow (http://blogs.dirteam.com/blogs/paulbergson/archive/2009/03/19/disabling-ipv6-on-windows-2008.aspx)
    to disable it

    - run dcpromo and follow the wizard to add the 2008 server to an existing
    domain, make it also Global catalog and DNS server.

    - for DNS give the server time for replication, at least 15 minutes. Because
    you use Active directory integrated zones it will automatically replicate
    the zones to the new server. Open DNS management console to check that they
    appear

    - if the new machine is domain controller and DNS server run again replmon,
    dcdiag and netdiag (copy the netdiag from the 2003 to 2008, will work) on
    both domain controllers

    - Transfer, NOT seize the 5 FSMO roles to the new Domain controller (http://support.microsoft.com/kb/324801
    applies also for 2008), FSMO should always be on the newest OS DC

    - after transfer of the PDCEmulator role, configure the NEW PDCEmulator to
    an external timesource and reconfigure the old PDCEmulator to use the domainhierarchie
    now. Therefore run on the NEW "w32tm /config /manualpeerlist:pEERS /syncfromflags:manual
    /reliable:yes /update" where PEERS will be filled with the ip address or
    server(time.windows.com) and on the OLD one run "w32tm /config /syncfromflags:domhier
    /reliable:no /update" and stop/start the time service on the old one. All
    commands run in an elevated command prompt without the quotes.

    - you can see in the event viewer (Directory service) that the roles are
    transferred, also give it some time

    - reconfigure the DNS configuration on your NIC of the 2008 server, preferred
    DNS itself, secondary the old one

    - if you use DHCP do not forget to reconfigure the scope settings to point
    to the new installed DNS server

    - if needed export and import of DHCP database for 2008 choose "netshell
    dhcp backup" and "netshell dhcp restore" command (http://technet.microsoft.com/en-us/library/cc772372.aspx)



    Demoting the old DC (keep in mind that it is highly recommended to have 2
    DC/DNS/GC per domain)

    - reconfigure your clients/servers that they not longer point to the old
    DC/DNS server on the NIC

    - to be sure that everything runs fine, disconnect the old DC from the network
    and check with clients and servers the connectivity, logon and also with
    one client a restart to see that everything is ok

    - then run dcpromo to demote the old DC, if it works fine the machine will
    move from the DC's OU to the computers container, where you can delete it
    by hand. Can be that you got an error during demoting at the beginning, then
    uncheck the Global catalog on that DC and try again

    - check the DNS management console, that all entries from the machine are
    disappeared or delete them by hand if the machine is off the network for ever

    - also you have to start AD sites and services and delete the old servername
    under the site, this will not be done during demotion

    Best regards

    Meinolf Weber
    Disclaimer: This posting is provided "AS IS" with no warranties, and confers
    no rights.
    ** Please do NOT email, only reply to Newsgroups
    ** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm


    > Hi
    > we have Windows server 2003 as a domain controller.
    > Now we want to install Windows 2008 on this computer an use it as
    > domain
    > controller.
    > Can we run installation over installed 2003 server to keep setings and
    > domain.
    > I am not suhe wether is it good idea.
    > JN
     
    Meinolf Weber [MVP-DS], Nov 27, 2009
    #2
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