duplicate name - with a CNAME

We had a DC (DC1) on windows 2003. I added DC2 and migrated all of the
services (WINS, DNS etc). Demoted the DC1 to a member server and then removed
it from AD, WINS and DNS.

I created CANAME in the DNS of DC2 for DC1 so that it points to the DC2. I
can ping but can not connect using the netbios (\\DC1) - gives system error
52 - duplicate name error. I have read the article and it says to disable
strict name check in registry - obviously we can not change thousands of PCs'
registry. Any other workaround? would greatly appreciate your help.
Thanks,
Mehul.

From what you've told us, the clients have no trouble resolving the alias
name. The purpose of the registry edit is to allow the aliased server to
listen/respond for an alias name. You only need to edit the registry on the
server that the CNAME refers to:

http://support.microsoft.com/default...b;en-us;281308

Doug Sherman
MCSE, MCSA, MCP+I, MVP

"mehul" <(E-Mail Removed)> wrote in message
news:3A980A73-2017-4D63-A8BA-(E-Mail Removed)...
> We had a DC (DC1) on windows 2003. I added DC2 and migrated all of the
> services (WINS, DNS etc). Demoted the DC1 to a member server and then
removed
> it from AD, WINS and DNS.
>
> I created CANAME in the DNS of DC2 for DC1 so that it points to the DC2. I
> can ping but can not connect using the netbios (\\DC1) - gives system
error
> 52 - duplicate name error. I have read the article and it says to disable
> strict name check in registry - obviously we can not change thousands of
PCs'
> registry. Any other workaround? would greatly appreciate your help.
> Thanks,
> Mehul.

Thanks Doug. Yeah I think I misunderstood the article. Thought the client
would enforce the strict name checking and not the server.

Thanks a lot.
Mehul.

"Doug Sherman [MVP]" wrote:

> From what you've told us, the clients have no trouble resolving the alias
> name. The purpose of the registry edit is to allow the aliased server to
> listen/respond for an alias name. You only need to edit the registry on the
> server that the CNAME refers to:
>
> http://support.microsoft.com/default...b;en-us;281308
>
> Doug Sherman
> MCSE, MCSA, MCP+I, MVP
>
> "mehul" <(E-Mail Removed)> wrote in message
> news:3A980A73-2017-4D63-A8BA-(E-Mail Removed)...
> > We had a DC (DC1) on windows 2003. I added DC2 and migrated all of the
> > services (WINS, DNS etc). Demoted the DC1 to a member server and then
> removed
> > it from AD, WINS and DNS.
> >
> > I created CANAME in the DNS of DC2 for DC1 so that it points to the DC2. I
> > can ping but can not connect using the netbios (\\DC1) - gives system
> error
> > 52 - duplicate name error. I have read the article and it says to disable
> > strict name check in registry - obviously we can not change thousands of
> PCs'
> > registry. Any other workaround? would greatly appreciate your help.
> > Thanks,
> > Mehul.
>
>
>

This tools does everything in the MS articale for you and it's free: http://www.arconi.com/CNAMEAllow.html