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Multi-home Windows 2003 AD Server - Issue with DNS Host A record disappearing
I have a Windows 2003 server with 2 NICs. It is using both NICs - they are on different subnets.
For some reason - the A (host) record for the one NIC will register in DNS and stay there. The other (from the other NIC) will not. I can even manually add it - but in a short period of time - approximately 10 minutes - the A record I create will be gone. What is making this A record I add - disappear?
For some reason - the A (host) record for the one NIC will register in DNS and stay there. The other (from the other NIC) will not. I can even manually add it - but in a short period of time - approximately 10 minutes - the A record I create will be gone. What is making this A record I add - disappear?
ASKER
Hi Brent. Thanks for the reply.
I can see how having it multihomed is an issue - but there are reasons I need to keep it this way for now.
The issue really is - why is the A Host record for the subnet B being deleted from DNS?
I'm adding it - but it is disappearing after about 10 to 15 minutes or so.
What is actually deleting it - and how can I make that A Host record stay in DNS?
Maybe coming about this a different way - what if I left it out of DNS.
But in the other Domain controller - I put something in the hosts file, etc. - so it could find it's partner domain controller.
What entry would I need to put in what file (hosts, something else) so that one comain controller could see another (without using DNS)? (it used to be LMHOSTS - or HOSTS - when using WINS)
I can see how having it multihomed is an issue - but there are reasons I need to keep it this way for now.
The issue really is - why is the A Host record for the subnet B being deleted from DNS?
I'm adding it - but it is disappearing after about 10 to 15 minutes or so.
What is actually deleting it - and how can I make that A Host record stay in DNS?
Maybe coming about this a different way - what if I left it out of DNS.
But in the other Domain controller - I put something in the hosts file, etc. - so it could find it's partner domain controller.
What entry would I need to put in what file (hosts, something else) so that one comain controller could see another (without using DNS)? (it used to be LMHOSTS - or HOSTS - when using WINS)
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I dont think that you will want both IP addresses to register in DNS. This usually causes AD replication issues on the domain controller. When there are 2 NICs on the domain controller, dns name resolution lookup returns requests in a round robin fashion. If both addresses are registered in DNS and you have clients in subnet A trying to find this domain controller, the dns server may return the domain controllers subnet B address. The same would go for other domain controller trying to contact this domain controller while they are trying to replicate.
Here is a reference article for more information: http://support.microsoft.com/kb/272294
Regards,
brent_caskey