I have site-subnets set, but sometimes it gets DC from other sites. Why ?

[Marlon Brown]

Interesting. I have total of 4 sites.
My DC IP=19.19.19.2 (subnet 19.19.19.0/24) appears on AD Sites & Services as
set to authenticate on Site1.

However, sometimes I launch "AD Users & Computers" and servers from other
sites appears listed on the top of AD Users & computers. Why ? I confirmed
that all DC's on Site1 is up and if I switch do "Domain Controller->Site1",
that works. Later it may get DC's from other sites again...

I am wondering what's going on. Win2K SP4.

 

[Cary Shultz [A.D. MVP]]

Marlon,

This is a somewhat common question. But a really good one!

Here are some basic questions that I am sure that you have already checked
but let's just make sure:

1) have you set up the four Sites in Active Directory Sites and Services?
2) have you created the appropriate subnet for each of the Sites and then
associated the correct subnet with the correct Site?
3) does each of the Domain Controllers have the correct IP Address (
assuming that each has a static IP Address )?

I would do a test with some clients in each of the Sites. Simply enter - at
a command prompt - set l. That is the lowercase letter 'L'. This will show
you against what Domain Controller the clients are authenticating. You
should see that all clients in Site4 are authenticating against the DC in
Site4 and that the clients in Site2 are authenticating against the DC in
Site2.

If this is not the case then you might want to look at 'generic' SRV
records. Please take a look at the following MSKB Article:

http://support.microsoft.com/?id=306602

Also, is DNS in order?

HTH,

Cary