Hi folks,
I have an internal DNS Server. It's running on Windows 2003 Server, although this problem was happening when it was on 2000 Server as well.
There are a bunch of hosts (A) in there, and several aliases (CNAME) as well. The A records seem to always work, however; the aliases will stop responding on a fairly regular basis. Maybe 3 times a week, a query for any alias will start failing. This happens to a handful of users, although I suspect that others just don't mention it. It doesn't happen to everyone at the same time, so it's not strictly a server problem. I know it has to do with client/server interaction.
I've found that issueing "ipconfig /registerdns" fixes the problem immediately. I'm running Win2K Pro SP4.
I suspected negative caching, but I don't need to flush the cache to fix it, just the registerdns (maybe this flushes the cache as well....). I know I can turn off negative caching, but I can't remember how (that's not what the points are for!).
Any ideas?
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What are the CNAME entries for? I would suggest if this is an Internet site to go to www.dnsreport.com and make sure they check out... CNAME entries can be incorrectly done and cause problems just like you are stating.
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Adam: no, I haven't gotten anywhere with this yet....it still happens sporadically and to different users.
dimante: yes, right now they have an internal primary (which has the aliases in it) and the secondary is an external server. The strange thing is that it's not the internal host records that stop responding - just the aliases. So, it seems like I'm still using the internal DNS server when the failure starts happening.
This is quite an annoying problem, since it seems like everything is set up by the book....and yet I haven't seen other people reporting this problem (except you Adam!)
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by: sinexecPosted on 2003-10-28 at 14:27:51ID: 9637532
It seems to me that the negative caching is not the source of problems at all (presuming there is no changes made in resource records in your DNS). Even though, I am not very familiar with Windows 2003 DNS server, it seems to be a problem of DNS updates in regard with your DHCP-assigned ip-addresses.
If it is not a must to have a dynamically-assigned DNS names with accordance with DHCP, the best option is to turn the feature off and use traditional, static DNS.