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neildeadman
Asked: 2012-03-22 06:37:42 +0800 CST

Active Directory Replication across Sites slow or not working

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I've just inherited (isn't it always the way!) a Windows Domain. The domain is spread across 2 sites.

Site01 has 3 DCs & Site02 has 2 DCs.

If I create a user in either site, the other DCs in that site, immediately replicate and show the new user. The new user is not shown in the other site though.

If I manually run the following command, everything syncs and the new user appears:

repadmin /syncall issdc01 /APed

In the Inter-Site Transports DEFAULTIPSITELINK the replicate every time value is set to 180 minutes. I thought this was the solution, but on another Windows Domain, this is the same, but replication takes place across sites immediately.

What can I check to resolve this issue? We are running Windows Server 2008

Results of dcdiag /test:dns show a server that is no longer part of our domain:

TEST: Delegations (Del) Error: DNS server: oldserver.win.domain.com IP: [Missing glue A record]

replication active-directory

3 Answers

  1. We have set the DEFAULTIPSITELINK to 15 minutes for the replication time.

    Local DCs replicate instantly... across different sites, it depends on this replication time.

    Change this to 15minutes, create a new users, it will replicate instantly across local DCs, wait 15 minutes, it will replicate across different sites.

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  2. Best Answer

    In AD Sites & Services, for the IP transport, I made a server at each site a preferred bridgehead server for that transport.

    This added a new "automatically generated" connection for each of those servers.

    Replication now occurs within around 30 seconds, even with the replication time set to 180 minutes.

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  3. See if this helps: Right click DEFAULTIPSITELINK, Properties, Attribute Editor, set Options to 0x1

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