| Author |
Message |
Matthew
Guest
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 Posted:
Fri Nov 11, 2005 5:50 pm Post subject:
Reduntand Domain Controllers |
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I have two domain controllers. Each on a seperate subnet. I did create
subnet objects and the domain database replicates with no problem. both
domain controllers run DNS/DHCP services.
The issue i have is when the domain controller for one of the subnets goes
down. users can no longer login, check their email, or access our sql
databases, all items which require authentication. I can understand users
not being able to startup their pc's, becuase their is no DHCP server, but
those clients that already have address have both DNS server ip's, therefore
they should be able to realize that the first DNS server is down and go to
the second one, and then use the second domain controller.
is my understanding correct, and if so, why is their no failover.
thanks in advance |
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Matthew
Guest
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| Posted:
Fri Nov 11, 2005 9:50 pm Post subject:
Re: Reduntand Domain Controllers |
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could you clarify "is routing working properly"?. users on both subnets can
work just fine as long as our primary DC is up. once it goes down, no
requests seem to get forwarded to the remaining DC/DNS server. |
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Matthew
Guest
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| Posted:
Fri Nov 11, 2005 9:50 pm Post subject:
Re: Reduntand Domain Controllers |
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as far as i know routing is working fine. there are no firewalls between the
sites.
users on both subnets can work as long as the primary DC is up, when it goes
down, noone can login. users on the remote subnet use terminal services and
the terminal servers are located on the subnet with the PDC. the terminal
servers have both DNS addresses and know where the other DC is. |
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Matthew
Guest
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| Posted:
Fri Nov 11, 2005 9:50 pm Post subject:
Re: Reduntand Domain Controllers |
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as far as i know routing is working fine. there are no firewalls between the
sites.
users on both subnets can work as long as the primary DC is up, when it goes
down, noone can login. users on the remote subnet use terminal services and
the terminal servers are located on the subnet with the PDC. the terminal
servers have both DNS addresses and know where the other DC is. |
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Brian Desmond [MVP]
Guest
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| Posted:
Fri Nov 11, 2005 9:50 pm Post subject:
Re: Reduntand Domain Controllers |
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Matt,
Is routing between the subnets working properly? Any firewall between them?
--
Thanks,
Brian Desmond
Windows Server MVP
www.briandesmond.com |
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Al-Taee
Guest
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| Posted:
Sat Nov 12, 2005 5:50 pm Post subject:
Re: Reduntand Domain Controllers |
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| Why you dont put the SDC as GC! |
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Matthew
Guest
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| Posted:
Sun Nov 13, 2005 5:50 pm Post subject:
Re: Reduntand Domain Controllers |
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they both hold Global Catalogs. if that is what you are referring to.
"Al-Taee" wrote:
| Quote: | Why you dont put the SDC as GC!
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Brian Desmond [MVP]
Guest
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| Posted:
Sun Nov 13, 2005 9:50 pm Post subject:
Re: Reduntand Domain Controllers |
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Have you run a dcdiag on the DCs and seen if it reports any issues? Are
clients pointing to both DCs for DNS? It sounds like there's a discovery
issue.
--
Thanks,
Brian Desmond
Windows Server MVP
www.briandesmond.com |
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Matthew
Guest
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| Posted:
Mon Nov 14, 2005 5:50 pm Post subject:
Re: Reduntand Domain Controllers |
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DCDiag reports everything fine. the only thing i noticed that was odd was
that when i ran the test with the DNS test only option each server only
reported itself under Domain controllers.
any thoughts on that |
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