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RPC server is unavailable when accessing windows 2008 DC

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RPC server is unavailable when accessing windows 2008 DC

Postby guest » Fri Sep 19, 2008 3:59 pm

In Active Directory Sites and Services, you have 4 DCs listed under
Default-First-Site-Name. When you select your new 2008 server and click
NTDS Settings, no connection is listed. If you manually create a connection
with a server and try to replicate, an error says that the RPC server is
unavailable and check for DNS settings is received.

If I have misunderstood your concern, feel free to let me know.

The root issue is that KCC failed to automatically create connection
objects because of the failure "DNS lookup" or "The RPC server is

Firstly, I suggest you configure the server 2008 to use the same DNS server
as that of a healthy DC:

1. Click Start, type ncpa.cpl in the Start Search box and press Enter.
2. Right click the network connection and select Properties.
3. Double click "Internet Protocol Version 4 (TCP/IPv4)".
4. Set "Preferred DNS server" to the same as that of a healthy DC.
5. Click Advanced and switch to DNS tab.
6. Make sure the option "Register this connection's addresses in DNS" is
checked and click OK.
7. Click OK twice.

Then, restart the server to check the result.

If the problem still occurs, please follow the steps below to check the
network infrastructure:

1. On a healthy DC, run the command "repadmin /showreps". Please note the
"DC object GUID" at the 4th line of the output.
2. On the problem server, run the command "ping <DC object
GUID>._msdcs.domain.com" and check the result.

Note: Replace <DC object GUID> with the DC object GUID got in step 1.

If the ping command fails, please check your DNS configuration.

3. On the problem server, run the command "telnet healthyDC.domain.com 135".

If the telnet command fails, please check if port 135 is blocked.
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