Wednesday, March 20, 2013 5:49 AM
We have three domain controllers running Windows Server 2012 in one site. On two of them DHCP role is installed with DHCP Failover.
After recently installed updates both DHCP+DC role are unable to communicate with each other. (RPC is unavailible) But both can communicate with third DC (w/o DHCP) without any problems. FireWall is off.
Wednesday, March 20, 2013 7:02 AMCan you please post any errors which you see in event viewer ?
Wednesday, March 20, 2013 7:21 AM
I see few errors in eventlogs. For example, DistributedCOM 10028
DCOM was unable to communicate with the computer DC2RC.XXXXXXX.com using any of the configured protocols; requested by PID aa0 (C:\Windows\system32\ServerManager.exe).
I think - this is a consequence, not a cause errors
The DFS Replication service encountered an error communicating with partner DC2RC for replication group Domain System Volume.
Partner DNS address: DC2RC.XXXXXXX.com
Optional data if available:
Partner WINS Address: DC2RC
Partner IP Address: xxx.xxx.xxx.xxx
The service will retry the connection periodically.
Error: 1727 (The remote procedure call failed and did not execute.)
- Edited by Evgeny Artemyev Wednesday, March 20, 2013 7:22 AM
Wednesday, March 20, 2013 8:02 AM
please assure that firewalls are open according to http://social.technet.microsoft.com/wiki/contents/articles/584.active-directory-replication-over-firewalls.aspx
Also assure to use ONLY the domain DNS servers on the NIC and none externals like the ISP.
An unedited ipconfig /all from all DC/DNS servers will give us help to verify the correct settings.
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Microsoft MVP - Directory Services
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Thursday, March 21, 2013 6:43 AMModerator
When the File Replication Service(FRS) fails, it could be the deaded "RPC Unavailable" error at work. About how to troubleshoot, please refer to this article:
How IT Works: Troubleshooting RPC error
And here is a similar issue:
DFS Replication failed
Hope this helps!
TechNet Community Support
- Marked As Answer by Vivian_WangMicrosoft Contingent Staff, Moderator Monday, March 25, 2013 1:21 AM