[Samba] Samba4 Replication Errors

[Donaldson Jeff]

Greetings,

I recently promoted a new DC in our existing domain. The existing domain consists of two domain controllers running Samba Version 4.2.0pre1-GIT-b505111 on Ubuntu 12.04 Server. The newly promoted DC is also running Ubuntu 12.04 server, but Samba Version 4.1.8. The promotion was successful and after a few tweaks to DNS, replication is working. It is however failing on some items and I'm at a loss on how to resolve them. Attached is the output of samba-tool drs showrepl for each of the servers. PDC1 and BDC1 are our existing DCs and BDC2 is the newly joined DC. BDC2 seems to fully replicate inbound/outbound to our PDC, but if I manually tell it to replicate to our PDC using any of the following commands samba-tool drs replicate PDC BDC2 dc=ncs,dc=k12,dc=de,dc=us, samba-tool drs replicate PDC BDC2 CN=Configuration,dc=ncs,dc=k12,dc=de,dc=us, etc...I get the following error -

ERROR(<class 'samba.drs_utils.drsException'>): DsReplicaSync failed - drsException: DsReplicaSync failed (-1073610723, 'NT_STATUS_RPC_PROTOCOL_ERROR')  File "/usr/local/samba/lib/python2.7/site-packages/samba/netcmd/drs.py", line 345, in run    drs_utils.sendDsReplicaSync(self.drsuapi, self.drsuapi_handle, source_dsa_guid, NC, req_options)  File "/usr/local/samba/lib/python2.7/site-packages/samba/drs_utils.py", line 83, in sendDsReplicaSync    raise drsException("DsReplicaSync failed %s" % estr)

It doesn't make sense that if I show replication and inbound\outbound is successful, why wouldn't manually telling it to replicate work? Any help\guidance is appreciated.


Regards,
Jeff


Jeff Donaldson
Technology Director
Newark Charter School
jeff.donaldson at ncs.k12.de.us
(302) 369-2001 ext: 425