I have added a 2012 Standard server to a 2003 functional level domain that had a single 2003 standard server. The 2012 server has been added to the domain and promoted to a domain controller. Both servers are on same LAN and in same subnet. Both servers have GC. all FSMO roles are on 2003 Server, Both servers have DNS installed, 2003Server is only authorized DHCP. plan to retire the 2003Server in near future. Logged on as built-in Administrator account on both servers. I have not been able to successfully replicate. Error numbers are 1722 The RPC server is unavailable, Experienced the following Operational Errors trying to retrieve replication information 58 - [2003Server].[domainName].
I have taken the following steps;
read several kb articles etc.
disable firewall on both servers
disable antivirus software
verify that NIC in each DC uses own address for DNS
verify that both servers DNS forwarders is ISP DNS servers
verify that each DC is the SOA in DNS and that each has an A record for the other server
verify that I can ping both ways, open shares, transfer files, etc.
ran repadmin /replsum from 2012Server results indicate Source 2003Server to 2012Server - 5 fails
ran repadmin /replsum from 2003Server. Results indicate Source 2012Server 0 fails. Source 2003Server 5 fails.
ran dcdiag from 2012Server (attached) names are substitutes