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Domain Controller Won't Replicate

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9 replies

by eboha

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Migrated from WINNT Server 4.0 to Windows 2000 Server. Got one domain controller running but can?t get 2nd domain controller to replicate.

I have a two domain controller LAN. Working DC is named MAINSRVR and the other is named BUSRVR. ADSL Internet connection is achieved through MAINSRVR containing 2 NICs (1 for ADSL side, 1 for LAN side). ADSL NIC = static IP xxx.x.x.2 and LAN NIC = static IP xxx.x.x.1.

Problem: BUSRVR Active Directory won?t replicate to MAINSRVR. Get error ?RPC server is unavailable.? I believe it?s a DNS problem.

When I ping MAINSRVR from BUSRVR by name, I time-out because the pinged IP address is xxx.x.x.2 (the ADSL NIC) instead of IP xxx.x.x.1 (the LAN NIC). I can successfully ping MAINSRVR via IP address xxx.x.x.1. Tried deleting IP xxx.x.x.2 from the DNS forward lookup zone on MAINSRVR, but DNS puts the address right back.

Help please.

9 replies

by cg it

Couple of questions first. When you first added the second server and installed AD on the second server, what settings did you use? [AD has a Wizard that allows you to choose what kind of server your creating on the network]. Check in admin tools, AD Sites & Services,sites,,servers, do you see both servers? If so, check your NTDS settings from your PDC and see what the settings are for replicate from. Then check on the BDC what the replicate settings are.

by cg it

You can also check your DC's in AD users and computers,Domain controllers. Are both servers listed? Another question [kinda basic] how is the second server connected to the first server? re switch,patch panel,???? Do you have WINS enabled?

by eboha

Answers to Answer 1 Questions: Used Additional Domain Controller for an Existing Domain to add second DC. Both servers are visible in AD Sites & Services. Physical connection is BUSRVR NIC to hub to MAINSRVR LAN-side NIC. WINS is installed but not sure how to check "enabled". PDC NTDS settings = from BUSRVR (BDC). BDC NTDS settings = from MAINSRVR (PDC). Also, network still operating in Mixed Mode.

by eboha

Rejected Answer 1 because submitter didn't respond again after I answered his/her questions.

by shaunjanzen

The problem is in DNS because the second DC is looking for the root DC on the external network that it has no access to. I had the problem on one of my new networks with a multihomed root DC. I used this document, http://support.microsoft.com/default.aspx?scid=kb;en-us;272294, and it worked.

If your multihomed DC is the master browser your Computer browsing service will not work. Microsoft states that a Master Browser can't be multihomed for browsing to work correctly. See http://support.microsoft.com/default.aspx?scid=kb;en-us;191611 for reference to this issue.

Shaun

by eboha

The Microsoft links no longer work. However the documents can be located by going to www.microsoft.com > Support > Knowledge Base > Windows 2000 > and searching for either 272294 or 191611. The documents provided exactly the info I needed. Many thanks.

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