Domain Controller cannot replicate - windows 2008 R2

Posted on 2011-10-13
Last Modified: 2012-05-12
Hi Experts,

My situation as below:

We are setting up a new domain for a branch office and we started by creating DC1 in the main office and DC2 in another branch office. We then start to build DC3 and DC4 with ifm media install method in the new branch office and moved the 3 domain's fsmo to DC3. As for some reason, we need to change the IP address of DC3 and DC4 using a differnet subnet range, and since then the replication stops replicating newly created objects on DC3 to other DCs.

I checked the repadmin /showrepl command and it shows the replication completed successfully.

Please help

Question by:nokyplease
    LVL 10

    Accepted Solution

    If DC3 and DC4 are using a differnet subnet range, you will need to create new subnet add it to AD sites and services and move DC3 and DC4 to the site that belongs to the new subnet.

    LVL 39

    Assisted Solution

    by:Krzysztof Pytko
    Run on those changed DCs in command-line

    ipconfig /registerdns

    and additionally, go to DNS management console, expand _msdcs.domain.local zone and go to gc node. Review if all hosts (A) records have appropriate IP address

    re-try AD replication

    LVL 15

    Assisted Solution

    by:Shaik M. Sajid
    LVL 24

    Assisted Solution

    It seems that before changing the IP adress the DC3 and DC4 replication was working as you have mentioned correct me if I am wrong.If this is the case you need to check the AD sites and services.
    Create the new subnet and map the subnet to the appropiate site.

    On the DC3 and DC4 as you have change the IP address you need to point the DND setting to itselft  i.e IP address of the server as prefered DNS server(assuming DNS role is installed on the server) and also add the alternated dns setting.

    Ran the following command in cmd.
    net stop netlogon
    ipconfig /flushdns
    ipconfig /registerdns
    net start netlogon
    net stop dns
    net start dns
    net stop ntfrs
    net start ntfrs
    gpupdate /force
    repadmin /syncall /AdeP

    Also reboot the DC once if possible and check.

    Also check the below ports are open.
    Port Assignments for Active Directory Replication
    Service Name        UDP       TCP
    LDAP                      389       389
    LDAP                                    636
    GC                                        3268
    Kerboros                 88          88
    DNS                         53          53
    smb over IP             445        445

    Reference article:


    Author Closing Comment

    yes it is the issue with site and service and it is fixed now, thanks everyone!

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