creating multiple sites

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C

concern

I have follow Microsoft KB Q200498 on how to configure a
Domain controller for membership in multiple sites. I have
already setup the sites. How to I let the sites know which
server to use. If I move the server to one site then the
other site will not have a server configuration.
 
Let me restate this. Look at the _msdcs SRV records on your DNS server.
This DC should have registered site specific DNS records for each site you
specified in the registry key. Clients looking for close DCs will query DNS
for the site specific records. This DC should be returned in the result
set. That makes it a candidate DC to do a ldap udp ping against.

J
 
from what I understand things go this way:

after setting the server with in the site you finished
with the phisicall placment and the subnetting

If a user need to find resources it will quire the dns
server for a DC, the DNS server will look for an srv
record and if he has more then one it will replay with the
closest DC ip address, how it find the closest one? by
looking on the ip address.

if you don't have an DC in every site the dns server will
give you a diffrent DC from a near by site.

the DC can be part only of one site, because of the ip
addressing.

Guy
 
This is close. It is important to understand site awareness and closeness
will work with a non-Microsoft DNS server.

When DsGetDCName is called, Netlogon will determine what site the client is
in. It queries DNS for DCs that are either in that site or cover that site.
It then udp ldap query/"pings" the DCs that are returned by DNS. It
respects weight and priority settings when choosing the order. It uses the
response time + data the DC returns to determine which DC for DsGetDCName to
return. When a DC's netlogon is registering DNS SRV records it registers
records for the site it is in. It may also determine it should register
records for a "close" site that doesn't have a DC in it. Close in this case
is determined by sitelink costs between sites. So when the client queries
for a DC in a site that has no DCs, one of these close DCs will be returned
as it registered a site based DNS record for the site with no DC in it.

"Name Resolution in Active Directory" chapter of the Distributed Systems
Guide of the Windows 2000 Server Resource Kit describes the DNS records AD
registers and how DC location is performed.
http://www.microsoft.com/windows2000/techinfo/reskit/en-us/distrib/dsbc_nar_jevl.asp?frame=true
provides details and examples of the above.

Jason
 
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