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FRS_ERR_CHILD_TO_PARENT_COMM
The file replication service cannot communicate with the file replication service on the domain controller. The event log may have more information.
FRS_ERR_CHILD_TO_PARENT_COMM is Win32 error 8011 (0x00001F4B) in legacy File Replication Service (FRS).
What to verify
Verify whether the local FRS service can send the required request to the selected parent and receive a valid response. Check child and parent identities, RPC endpoint and network trace, and DNS records and selected connection object.
Likely causes
- network or RPC connectivity fails in the child-to-parent direction.
- DNS selects an unreachable parent.
- firewall rules are asymmetric.
- the parent FRS service is unavailable.
Troubleshooting steps
- Collect child and parent identities.
- Record RPC endpoint and network trace.
- Correlate DNS records and selected connection object with the File Replication Service event log, Service Control Manager, Directory Service and Netlogon events, RPC diagnostics, and replica-set state.
Handling, retry, and recovery
Restore directional connectivity and parent service health, then verify a simple authenticated RPC operation before restarting replication work.
Related errors
FRS_ERR_PARENT_TO_CHILD_COMM reports failure in the reverse direction
Example
A site firewall allows connections initiated by the DC but blocks member-to-DC dynamic RPC. Updating the directional rule lets the child contact its parent.
References
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