Re: Missing DC's from _sites container
From: Herb Martin (news_at_LearnQuick.com)
Date: 11/22/04
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Date: Mon, 22 Nov 2004 17:28:09 -0600
> I'll try cross-posting...I guess I'm just a newbie! How do I reply to a
> cross-post so that the reply hit's both NG's? It seems my reply may only
go
> to one NG?
Most news client programs, especially Outlook Express, do this
automatically when you Reply-GROUP.
Otherwise it depends on your news client program.
> Anyways, Yes there are multiple sites, one for each DC. Each DC should
> have it's own site within the "DC._sites", folder but some do not.
Most of the time this is caused by misconfiguring the CLIENT
DNS (NIC-IP-DNSServer) settings on the DC(s).
All of the DCs are also DNS clients -- or should be -- of the
INTERNAL ONLY DNS server (set).
The other likely reason is if you started using AD-Integrated DNS
on multiple DCs before you got AD to fully replicate.
AD is dependent on DNS for replication and if you make DNS
dependent on AD before getting that right it is a circular problem.
Use DCDiag on each DC to check the DNS and to also check
AD replication. There is a /FIX switch but it is not all inclusive
so it may not fix everything -- one thing it does address though is
trying to fixup the DNS.
DNS
1) Dynamic for the zone supporting AD
2) All internal DNS clients NIC\IP properties must specify SOLELY
that internal, dynamic DNS server (set.)
3) DCs and even DNS servers are DNS clients too -- see #2
Restart NetLogon on any DC if you change any of the above that
affects a DC.
Ensure that DNS zones/domains are fully replicated to all DNS
servers for that (internal) zone/domain.
-- Herb Martin "AVTechs" <avtechs@aspenview.org> wrote in message news:9BD2D264-E529-42D9-9BA3-73FCD3F2D885@microsoft.com... > "Ace Fekay [MVP]" wrote: > > > In news:8D5A49BC-DCB9-45CD-B9CD-346F4CF2F059@microsoft.com, > > AVTechs <avtechs@aspenview.org> made a post then I commented below > > > We've noticed that Domain Controllers are mysteriously disappearing > > > from DNS. We have 14 DC's and it seems that there are always the same > > > 10 that disapear from the > > > > > > DNS/Fwd Lookup Zones/"domain"/_msdcs/ds/_sites folder. > > > > > > All other DC information in DNS is OK, only the above container is > > > missing the DC's. This causes users to home to the wrong server when > > > logging in, causing slow logins. > > > > > > If we run a netdiag /l /fix on each individual missing servers, DNS is > > > repaired and the DC entries are placed back into DNS _sites folder. > > > > > > We are trying to figure out what is causing these DC's to be removed > > > from DNS. Recently we have installed a new Exchange 2003 server. We > > > noticed the first time we ran ForestPrep and DomainPrep the same > > > thing happened and we had to run netdiag /fix on all the missing > > > DC's. Since the first netdiag /fix DNS has been OK. But we've just > > > noticed that DC's are missing once again and neither of those tools > > > have been ran. Still searching around to see how and why these > > > entries would be delete/removed. > > > > > > Any ideas would be helpful. > > > > > > Avtechs > > > > See my reply in the other DNS newsgroup. > > > > FYI: It's better to cross-post to similar groups instead of multiposting. > > The benefit is responses from any of the groups come back to all the groups > > at the same time, that it was cross-posted in so you don't have to check > > each one individually to find the individual responses > > > > (This was x-posted to windows.server.dns - no followups set). > > > > Ace > > > > Thanks Ace, > > I'll try cross-posting...I guess I'm just a newbie! How do I reply to a > cross-post so that the reply hit's both NG's? It seems my reply may only go > to one NG? > > Anyways, Yes there are multiple sites, one for each DC. Each DC should > have it's own site within the "DC._sites", folder but some do not. > > Ex. > DNS.Fwd Lookup Zones."domain"._msdcs.dc._sites.DC1 > DNS.Fwd Lookup Zones."domain"._msdcs.dc._sites.DC2 > DNS.Fwd Lookup Zones."domain"._msdcs.dc._sites.DC3 > DNS.Fwd Lookup Zones."domain"._msdcs.dc._sites.(missing DC) > DNS.Fwd Lookup Zones."domain"._msdcs.dc._sites.(missing DC) > . etc...... > > As well, we do not have any Win2k3 DC/DNS servers yet. We have all Win2000 > Servers w/SP4. > > What I don't understand is why the DC's are missing from ONLY the above > container and yet ALL other instances of their entries in the following > containers are intact. > > DNS.Fwd Lookup Zones."domain"._sites > DNS.Fwd Lookup Zones."domain"._tcp > DNS.Fwd Lookup Zones."domain"._udp > > My biggest concern is to why only the _msdcs.dc._sites.DC1 are dissapearing. > > Thanks. > > Avtechs
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