Does this apply in your situation: http://technet.microsoft.com/en-us/library/cc787034.aspx
it fixed my similar problem --BM On Fri, Feb 6, 2009 at 8:35 AM, Sauvigne, Craig M <sauvig...@winthrop.edu> wrote: > Here is an update to my DNS issue. I was focusing on one of our two domains > since that is the only place there were issues. Now I have heard it is > happening in the other domain. I have narrowed down the problem. Here is > what I am seeing. > > > > We have three servers: > > > > SVR1 – DNS > > SVR2 – DHCP > > SVR3 – DNS and DHCP > > > > A client requests and DHCP-assigned IP from SVR3: Everything works as > expected. If a client requests from SVR2, it received and IP address and it > shows in DHCP. However, neither DNS server gets updated. I can see the DHCP > entry has an icon with a pen on it meaning it is waiting to write to DNS. > Those are the facts. > > > > Here is my speculation. Each time I reboot SVR2, everything will work for a > certain time (haven't had time to figure out how long that is just yet). At > some point, that DHCP server stops updating DNS. Then DNS goes through its > scavenging and cleans out those records since it thinks they are stale. > > > > Aside from scheduling a server reboot within the scavenging period, does > anyone have any suggestions? I have reset the credentials so that is not a > problem. I do have reverse DNS set up. Any other suggestions? > > > > Thanks! > > > > Craig > > > > From: Brian Desmond [mailto:br...@briandesmond.com] > Sent: Friday, January 30, 2009 11:49 PM > To: NT System Admin Issues > Subject: RE: Weird DNS issue > > > > You might set some auditing on the DNS containers in AD such that events get > logged when the entries get deleted and see where it's coming from. I'd > venture to guess that your records aren't being refreshed for one reason or > another and are thus being scavenged. > > > > Don't forget there are two scavenging settings: > > > > è The interval the actual thread runs (this is on the properties of the DNS > server in the UI) > > è The timeout for the zone (this is on the properties of the zone, Advanced > tab or something similar in the UI) > > > > Thanks, > > Brian Desmond > > br...@briandesmond.com > > > > c - 312.731.3132 > > > > From: Sauvigne, Craig M [mailto:sauvig...@winthrop.edu] > Sent: Friday, January 30, 2009 10:04 AM > To: NT System Admin Issues > Subject: RE: Weird DNS issue > > > > I sent this earlier but had a technical issue so it may not have gone out. > Here it is again. > > > > Let's see if I can answer everyone's questions. I should have given all this > info in my original post but was rushed while trying to send it. > > > > The DNS entry does actually disappear from the zone on the DNS servers (we > have two and the entries are gone from both). Each building (which means > each lab) is in a different subnet. > > > > We are a Windows shop so our DNS, DHCP, AD (obviously) are all Windows > boxes. We have a few Win2000 but most are Win2003 (no 2008 just yet). > Scavenging is set to 7 days. > > > > When running an nslookup by hostname or FQDN, it returns a message saying > "non-existent domain". Sometimes, other machines in that lab may respond. > > > > I have checked the configs for our different zones and they look the same. > This issue only affects the one zone that is used for our computer labs. > > > > And we are a single site. > > > > I think that was just about all the questions. Let me know if there is more > I can provide to help get this resolved. > > > > Thanks everyone! > > > > Craig > > > > > > ________________________________ > > From: Stephan Barr on behalf of lists > Sent: Thu 29-Jan-09 5:10 PM > To: NT System Admin Issues > Subject: RE: Weird DNS issue > > Tell us more please. One subnet or more? Windows version. All in one site > or more? What does your DNS config look like? > > > > Cheers. > > > > ________________________________ > > From: Sauvigne, Craig M [mailto:sauvig...@winthrop.edu] > Sent: Thursday, January 29, 2009 4:00 PM > To: NT System Admin Issues > Subject: Weird DNS issue > > > > Okay. I have something odd going on that I can't seem to nail down. > > > > I work for a University and we have a home-grown system that monitors all > the lab computers around campus to see if someone is logged on (headcount > tracking). Every few weeks, that system will suddenly show labs as empty > that are not. In troubleshooting, we have found that those empty seats > result from those machines having lost their record in DNS. The machines > can't be pinged by hostname since there is no DNS entry anymore. The > machines are still online (ping by IP works, remote management by IP works, > computer is still usable). It just drops out of DNS. Today this happened in > the middle of the day. The machines worked fine until around 1pm or 2pm. I > don't show anything in logs on the DNS servers that look relevant. > > > > Does anyone have any ideas on what I can look for? It is an odd one because > it is random when it happens and random as to which machines are affected. > It usually happens to a full lab of computers but other machines in that > building are unaffected. > > > > Any help will be greatly appreciated! > > > > Thanks. > > > > ==================== > > Craig M. Sauvigne > > System Administrator > > Winthrop University > > Rock Hill, SC 29733 > > sauvig...@winthrop.edu > > SC143 > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
