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DNS replication issues on W2K8 R2 Dc child domain

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Last Modified: 2012-05-11
Guys,
Hope you can help,
We have an AD domain with the root domain being abc.local, we have added multiple child domains over the years with no issues, we have say us.abc.local, ca.abc.local etc.
I wanted to create a new child domain us.abc.local the server is W2K8 R2, the first DC in the abc.local domain is W2K8, and with a mixture of windows 2003 DC's as well.
The child domain created fine but when i tried to make the DNS zone au. Abc.local forest wide I get the error, i can change the server to replicate to all DC's in the forest but it doesn’t work.
When i had the dc1.abc.local to the NS server is says "the server with this IP address is not authoritative for the required zone". i have tried manually copying the zone (zone transfer) this completed but is not updated. We also have issues with site replication with the following error:

The RPC service is not available, although I can ping by FQDN and NetBIOS.
the other child domains and the root domains have however replicated to the au. Abc.local DC/DNS.
I have a feeling it maybe down to IPv6or SP1 for W2K8 R2 not being installed, i have now installed SP1; I have also removed the DNS role from the server and re-added it with the same errors.
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