On Mon, Jun 15, 2015 at 8:48 AM, Melvin Backus <[email protected]> wrote: > It sounds like they're getting tombstoned. If they're static IPs try setting > the DNS entries statically as well.
Manually entering them into DNS, you mean? I am really trying to avoid entering hundreds of IPs statically into DNS .. And why would they be tombstoning so soon? > > -- > There are 10 kinds of people in the world... > those who understand binary and those who don't. > > -----Original Message----- > From: [email protected] [mailto:[email protected]] > On Behalf Of Michael Leone > Sent: Monday, June 15, 2015 8:41 AM > To: [email protected] > Subject: [NTSysADM] DNS errors after installing Win2012 R2 DCs > > I have installed 3 new Win2012 R2 DCs, which will be the replacements for my > Win2008 R2 DCs. I have repointed everything to use one of the new Win2012 DCs > for DNS, rather than the Win2008 R2. And now I am seeing DNS errors. > > Specifically, hosts will just drop out of DNS. (these are servers with static > IPs). An nslookup will fail, and examining the zone will show no record at > all for that server (even though that server has been in existence for > years). Doing a "ipconifg /registerdns" on the missing server does make it > show back up in DNS. But why is it dropping out in the first place? > > Event log on the DNS server (the server listed first in DNS settings for all > my hosts) is showing occasional warnings of event 7062, finding a packet > addressed to itself. Can't imagine what is doing that, I have checked and > this DNS server doesn't have itself as a forwarder, and is on the notify list > of the primary zone (notification is set to all servers on the NS tab, and > this one is). > > So I am not sure what's going on, or what is causing it. > > Zone is set for "Secure only" dynamic updates, aging is set to scavenge stale > records every 7 days (no-refresh and refresh interval) . These should be the > defaults (we haven't changed the zone since we installed the Win2012 DCs. > > There is 1 wrinkle - we use SolarWinds, and their IPAM (IP Address > Management). That software sets itself to receive zone transfers (so it can > track DNS and DHCP), and so it is listed on the "Zone Transfers" tab, as an > allowed server. But the "Notify" button is set to automatically notify only > servers on the Name Servers tab. > > I know that there is zone transfer working from the SolarWinds server, I see > event log entries showing zone transfer from that server. > > Anybody use this IPAM? > > I am going to try changing the notification list to be manual, and include > the SolarWinds server. > >
