Re: AD DNS redundancy

From: Kevin D. Goodknecht Sr. [MVP] (admin_at_nospam.WFTX.US)
Date: 10/10/04 

Date: Sun, 10 Oct 2004 01:09:08 -0500

In news:%23LtDEiMrEHA.1988@TK2MSFTNGP09.phx.gbl,
Fredrick A. Zilz <fzilz@NOSPAM.interhealthusa.com> commented
Then Kevin replied below:
> I have a small network (30 users 5 servers, Sql and DNS,
> Exchange, NAS, Web, and an old server that I use as a
> second DNS server) The Exchange, NAS and Web servers are
> member servers the others are AD DCs. All servers are
> Windows 2003. My SQL / DNS server is the primary server
> for my domain. The second DNS server is an AD DC - DNS
> is AD. Here is my issue. When my Sql / primary DNS
> server is unavailable, I loose the ability to logon to
> my network as well as Domain Name resolution? My DHCP
> has both DNS servers listed as DNS servers. My secondary
> DNS server lists itself and the primary for its DNS.
> Why am I loosing the ability to logon and resolve names?
> What am I doing wrong.
>
> Thanks in advance for your assistance.

Can you give a little better description of your DC and DNS server
configuration?
Are your zones stored in Active Directory?
How is the replication set on the zones?
Are al of your DNS servers on DCs?

You should run dcdiag and Netdiag from all of your machines to see if you
have proper domain communication.
Run Netdiag with the /v or /debug switch.

If you have DNS errors run netdiag /fix then run netdiag /test:dns /debug
which will check DNS registrations for all SRV records when ran from the DC.

When you run Dcdiag from a member that is not a DC use this command dcdiag
/n:dnsdomainname /c /v /e this will perform comprehensive tests on all DCs
in the enterprise. 

-- 
Best regards,
Kevin D4 Dad Goodknecht Sr. [MVP]
Hope This Helps
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