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Communication error between the agent and server in DPM 2012

06/11/2012

The following error may occur in cases of DPM installation on machines that already had some other System Center 2012 Beta and Release Candidate.

Symptom

Log Name: Application
Source: DPMRA
Event ID: 85
Level: Error
User: SYSTEM
Description:
The DPM agent failed to communicate with the DPM service on W2K8R2-DPM. sincic.com .br because of a communication error. Make sure that the DPM-W2K8R2. sincic.com .br is remotely accessible from the computer running the DPM agent. If a firewall is enabled on DPM-W2K8R2. sincic.com .br, make sure that it is not blocking requests from the computer running the DPM agent (Error code: 0x23e750, full name: W2K8R2-DPM. sincic.com. br).

Log Name: System
Source: Microsoft-Windows-DistributedCOM
Event ID: 10006
Level: Error
User: N/a
Computer: W2K8R2-HV-AD. sincic.com .br
Description:
DCOM got error "2147944121" from the computer W2K8R2-DPM. sincic.com .br when attempting to activate the server:
{CC7D8A18-C386-48D5-9906-4FFC77A39788}

Cause

On the server already existed some installation of products that use RPC port for internet, as RPC-Over-HTTP, SCOM, SCCM and others. The error does not occur on machines specifically designed for DPM.

The registry is created a subkey in the PRC for internet access, indicating the available ports and with some parameters that end up creating problems in remote calls in your local network.

Solution

Make a backup of the registry tree below and delete.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Rpc\Internet

Reboot the machine to reconfigure the RPC services and rebuild the communication tests with the DPM agent.

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