Virtual or real metal?
Nics are Intel or Evil Broadcoms (TM)?
(if virtual and if Evil Broadcoms (TM) ensure you have disabled rss/toe
and VMQ on the parent)
MS wants feedback on patching: http://tinyurl.com/patchingsurvey
On 6/15/2015 8:48 AM, Michael Leone wrote:
On Mon, Jun 15, 2015 at 9:57 AM, Kurt Buff <[email protected]> wrote:
dnscmd can list your static addresses.
OK, the problem is that the IP addresses registered by the servers are
dropping off DNS completely. These are not static records we created
in DNS. They are statically assigned addresses on the server, however.
And now they are completely gone.
If I go to an elevated command prompt and "ipconfig /registerdns", it
will register in DNS, and I can then see the record in there.
But why is it disappearing in the first place?
And why is not automatically re-registering itself? It works fine if I
do it manually. And I see no errors in the DNS server log, or on the
logs of the servers who have had their records dropped off.
Any actual static records - i.e., A records we manually created -
those are all there and fine. It's the renewal of registration that
seems to be not happening, and those the record completely gets
dropped out of DNS.
They can't be because of scavenging ...
Sorry for being brief - I've got my 9mo sleeping in my arm/lap.
Kurt
On Mon, Jun 15, 2015 at 6:54 AM, Michael Leone <[email protected]> wrote:
On Mon, Jun 15, 2015 at 9:52 AM, Kurt Buff <[email protected]> wrote:
dnscmd is your friend.
No doubt. What exactly I ask my friend, I don't know ... and what to
look for in the returned responses
On Mon, Jun 15, 2015 at 6:05 AM, Michael Leone <[email protected]> wrote:
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.
