How To Restart Dns Services Windows 2008 R2
It looks like yous also rebooted the DHCP, is this right?
EDIT: Aye, when you're taking a server down it'south all-time to schedule it subsequently hours with the least impact. Imagine if the migration had a hitch.
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Mike,
That's a good question, it SHOULD automatically look to the secondary DNS if the primary fails, all the same I've establish the same consequence with Windows DNS. I thing I noticed is that information technology wasn't universal -- we would reboot one of the DCs and a portion of people would lose their ability to resolve, and so I call back it has to practice with which DC you authenticated to when yous logged in.
That beingness said information technology was easier to stop rebooting DCs during the twenty-four hour period... feel, its a bitch...
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mhache This person is a verified professional. Verify your account to enable It peers to run across that you are a professional person. 
Did they lose annihilation else bated from Web admission? Is your DHCP scope provisioning out the second DNS server?
I would check that your forwarders are correct on the second DNS server.
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What was your default gateway gear up to?
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Dumb question, but practice your workstations have both DNS servers listed in their network adapters? And what was the gateway? Was it a server or a router?
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There are two things here.
i. It'due south my understanding that MS Workstations will option at random any DNS servers configured and since all DNS servers are assumed to accept all correct data if one doesn't take information technology, they all must not .
or
two. MS Workstations contact primary and when it doesn't have the data information technology caches "No information" and doesn't try the 2d.
Obviously (hindsight is xx/20) information technology's never a skilful thing to reboot the primary anything during working hours, if you plan to exercise this again, change the DHCP main DNS to the temp secondary and merely have the user reboot if they are having issues.
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@Matt Due west
Yes I did reboot the DHCP server. But I causeless if all users were logged in that this would be a non issue. I approximate I was incorrect. I knew if someone tried to log in that they would not get an IP accost.
@Daniel3993
We are 24/7 and no fourth dimension is a good time. And frankly I'grand soo ill of staying up till 2am on a weeknight to do this stuff. I guess information technology was a rookie move.
It's funny crusade I'g really trying to set vMotion up as nosotros speak. I don't much about it but I'm thinking you need shared storage for vMotion. I hope not.
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WireBug This person is a verified professional. Verify your account to enable It peers to see that you are a professional.
Check your DHCP and make sure it is assigning both servers to DNS. Ensure that your second DNS server has DNS Forwarders setup. Without them DNS would neglect for internet access.
To become proper forwarders yous should be able to reference your 1st DNS servers Forwarders to find out. Forwarders are mostly your ISP DNS servers.
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Check your DHCP and make sure it is assigning both servers to DNS. Ensure that your 2nd DNS server has DNS Forwarders setup. Without them DNS would fail for internet access.
To get proper forwarders you should be able to reference your 1st DNS servers Forwarders to find out. Forwarders are generally your ISP DNS servers.
DNS won't affair if the gateway IP is wrong (pointed to one of the DC's).
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@Matt W
Yes I did reboot the DHCP server. Just I assumed if all users were logged in that this would exist a non issue. I gauge I was wrong. I knew if someone tried to log in that they would not become an IP address.@Daniel3993
We are 24/7 and no time is a good time. And frankly I'm soo ill of staying up till 2am on a weeknight to do this stuff. I guess information technology was a rookie movement.Information technology'southward funny cause I'm actually trying to set vMotion up every bit we speak. I don't much well-nigh it just I'yard thinking you demand shared storage for vMotion. I hope not.
Shared storage is nifty for vMotion. I have not tried to set it upward without shared storage, so I tin't think per to documentation if information technology'south suppose to work or not.
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- Workstations configured for both DNS servers
- Workstation gateways are pointed to a SonicWall firewall 10.two.ane.250
- I lost public an internal spider web access, My Spam filter also lost connexion and queued mail until the DNS was back online
- Yes my DHCP server is dishing out Gateway, Domain, DNS1 & 2
@mhache"I would check that your forwarders are correct on the second DNS server."
Your question is a bit over my head.. but i am going to google that to see if information technology is configured correctly.. considering I would take thought it would have failed over.
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mhache This person is a verified professional. Verify your account to enable IT peers to see that you are a professional.
Open upwardly your DNS Director on the second DC. Right click on your DC name and select Properties.
Under properties you should see a tab labeled Forwarders. Make sure you lot take external DNS sites hither (I use Google DNS eight.8.8.8 and 8.8.4.4)
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@mhache"I would check that your forwarders are correct on the second DNS server."
Your question is a bit over my head.. only i am going to google that to run into if it is configured correctly.. considering I would have idea it would accept failed over.
No need:
http://technet.microsoft.com/en-us/library/cc754941.aspx
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Open up your DNS Manager on the 2nd DC. Right click on your DC name and select Properties.
Under properties you should see a tab labeled Forwarders. Brand sure you have external DNS sites here (I apply Google DNS viii.8.8.8 and 8.8.iv.4)
I add OpenDNS servers to both of those every bit well:
208.67.222.222 & 220.220
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@mhache
Yous my friend are a Genius. I dcpromo'd a domian controller 6 months ago and I though I removed all reminisce of it simply I judge I did non.
Under Secondary Servers Forwarder Tab
ten.2.1.40
10.2.i.ten <-- Old no longer in service.. should be 10.2.1.4
- Can I modify this in the middle of the day?
- Under my Master Servers Forwarder Tab it's empty? Should it be empty?
- Do I add public DNS servers like Google to the Primary and Secondary servers?
- Can I add them now in the middle of the twenty-four hours?
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mhache This person is a verified professional. Verify your account to enable IT peers to see that you lot are a professional person.
Yep, the change shouldn't impact anything at all. (except brand your DNS piece of work next time :p)
And No, your Forwarders Tab should read some external DNS servers. It more or less takes care of proper name resolution in the consequence that you lot cannot resolve it internally. You tin either use your ISP's DNS, Googles, Open DNS or all of the higher up.
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Should all my DNS servers take forwarders? Even my primary?
Primary DNS Server > Properties > Forwarders Tab
It'southward Blank? Should information technology be Blank?
My Secondary lists IP's merely my Chief does not.
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Should my primary DNS servers forwarder tab be empty?
Chief DNS > Properties > Forwarders Tab
It lists no ip's? Should information technology be Blank?My Secondary lists IP's but my Chief does not.
No, it should not be blank.
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Also make sure both DC's are setup like this:
Server A
Master DNS (IP of Server B)
Secondary DNS (loopback)
Server B
Primary DNS (IP of Server A)
Secondary DNS (loopback)
and then make sure you have forwarders setup on both so they know where to frontward external requests.
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So the Forwarder tabs should look like?
Primary DNS Server FWD Tab (10.two.1.40)
1 - 10.2.1.4
2 - eight.8.eight.8
Secondary DNS Server FWD Tab (ten.2.1.4)
ane - 10.2.1.forty
2 - 8.8.8.8
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Don't stay upwardly, set up a scheduled chore that runs once to stay upwards for yous. Set the task to run shutdown /r at 2am -- or whatever is the least inconvenient time. and go to sleep... Check information technology the next day to ensure that it completed with a "The operation completed successfully (0x0)"
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mhache This person is a verified professional. Verify your account to enable IT peers to come across that you lot are a professional.
If I remember correctly you keep your internal DNS servers out of your forwarder list.
As well run the best practice analyzer that's in server manager. It'll allow y'all know any potential problems with your DNS server.
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And so the Forwarder tabs should expect like?
Main DNS Server FWD Tab (x.2.1.twoscore)
1 - 10.ii.1.iv
ii - viii.8.8.8Secondary DNS Server FWD Tab (10.two.ane.4)
one - 10.ii.1.40
ii - 8.eight.8.8
No. What I was talking nigh has to do with the actual NIC settings. Like Mhache just said, you practise not desire to put internal DNS servers in that tab in typical situations. That may be different in really big environments but not in the SMB environments I've seen.
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essjae This person is a verified professional. Verify your account to enable Information technology peers to see that yous are a professional.
So the Forwarder tabs should look similar?
Primary DNS Server FWD Tab (10.2.1.40)
1 - ten.2.ane.4
2 - 8.8.8.eightSecondary DNS Server FWD Tab (10.2.1.four)
1 - 10.2.one.twoscore
two - 8.8.viii.8No. What I was talking about has to practise with the actual NIC settings. Like Mhache just said, y'all exercise not want to put internal DNS servers in that tab in typical situations. That may exist dissimilar in actually large environments merely not in the SMB environments I've seen.
To add to Bill, check out this: http://technet.microsoft.com/en-u.s.a./library/cc782142(five=ws.x).aspx
Understanding forwarders
A forwarder is a Domain Name Arrangement (DNS) server on a network used to forwards DNS queries for external DNS names to DNS servers outside of that network.
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How To Restart Dns Services Windows 2008 R2,
Source: https://community.spiceworks.com/topic/460922-windows-dns-server-reboot-rookie-move
Posted by: arnoldexperwas89.blogspot.com
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