Is anyone in your environment manually initiating scavenging? Does the SolarWinds product do that?
I know that it's easy to knock out static DNS records doing that - I presume it's possible to knock out registered records as well. Kurt On Mon, Jun 15, 2015 at 9:45 AM, Michael Leone <[email protected]> wrote: > On Mon, Jun 15, 2015 at 12:28 PM, Susan Bradley <[email protected]> wrote: >> I haven't met an HP server that doesn't natively ship with Broadcom nics >> even though they are called HP network cards. >> >> You sure those suckers aren't evil Broadcoms? > > > Dunno, I didn't set up the hardware, one of the other guys did, I just > dcpromo'ed it. i suppose they could be ... one of them is a blade, > using their "FlexFabric 10G 2 port 534FLB" adapter. > > I rolled out the VMs. > > All the servers that dropped out of DNS all point to DC#5 (VM) and > DC#6 (HP physical, the blade mentioned above). > As a specific example: > > DWB019 has a static IP address, and the above 2 servers as it's DNS > settings. No manually created A records created in DNS, we just let it > register. Up until this morning, all was well. > (last Thu, we changed the DNS settings to point to #5 and #6, it's > current DNS settings (both Win2012 R2), from the older DC#1 and #3 - a > physical and virtual Win2008 R2. Did not reboot, flush DNS, etc - we > just changed the DNS settings on the NIC) > > DC #5 and DC #6 have been DCs for the last 2-3 weeks, and have been > DNS servers. We just hadn't pointed any clients directly at them, to > use as their DNS settings on their NICs. > > This morning, there is no record of DWB19 in DNS at all. I go to > DWB019, open an elevated command prompt, do "ipcofig /registerdns", > and then there is a record in DNS, timestamped this morning at 10AM. > > So why did it drop out of DNS over the weeked? And why didn't it renew > itself, especially if a manual register works just fine? > And how do I stop it from doing that again? > > > > >> >> MS wants feedback on patching: http://tinyurl.com/patchingsurvey >> On 6/15/2015 9:18 AM, Michael Leone wrote: >>> >>> On Mon, Jun 15, 2015 at 11:59 AM, Susan Bradley <[email protected]> >>> wrote: >>>> >>>> Virtual or real metal? >>> >>> Both. 2 virtual, 4 physical. :-) The "main" DNS server, the ones >>> almost all the servers point at (and therefore should be registering >>> with), is virtual. The physicals are 2 Dell and 2 HP boxes. >>> >>>> Nics are Intel or Evil Broadcoms (TM)? >>> >>> The virtuals are all vmxnet3, the Dell physicals have teamed Broadcom >>> NICs and the HP has their NIC teamed. >>> >>>> (if virtual and if Evil Broadcoms (TM) ensure you have disabled rss/toe >>>> and >>>> VMQ on the parent) >>> >>> The parent. You mean on the vmhost? Ours is VMware 5.5 U2, running on >>> HP hardware, so they aren't using Broadcom NICs.. >>> >>> >>> >> >> >> > >
