Solved

The "Alternate DNS Server" is actually never put into work ??

Posted on 2014-01-10
4
315 Views
Last Modified: 2014-01-30
I shut down one of DNS servers for a couple of hours for maintenance and this DNS happens to be listed as "Preferred DNS Server" on all computers. After I shut down, my LAN started to be disconnected simply because this "Preferred DNS Server" is temporarily down. BUT don't forget we do have another secondary DNS server properly set up as "Alternate DNS Server". How come this "Alternate DNS Server" was NOT coming to help when the Preferred DNS Server is down??
Did I miss anything so the Alternate DNS Server never comes to play its role? Please help.
0
Comment
Question by:Castlewood
4 Comments
 
LVL 22

Expert Comment

by:Nick Rhode
ID: 39772062
And DHCP is pushing both DNS servers correct?  Are the two servers not syncing properly? Perhaps DNS service is not started on the 2nd server?
0
 

Author Comment

by:Castlewood
ID: 39772159
DHCP should not be a factor since computers with static assigned IP are with the issue too.
I verified and confirmed that both DNS servers are working well individually. The issue here is, the "Alternative DNS Server" is just not playing its role to kick in when the Preferred is down.

But don't you guys have this identical issue at your environment?
0
 
LVL 35

Expert Comment

by:Mahesh
ID: 39772386
What exactly happens when you say LAN computers started disconnection ?
Are the disconnected server also holding Active Directory and FSMO role ?

Internet gone down ?
may be DNS forwarder is set on disconnected DNS server
OR
Applications are stopped working ?
 
Mahesh
0
 
LVL 5

Accepted Solution

by:
piwowarc earned 500 total points
ID: 39801705
Hello

Are you able to query both those servers with success?  If you don't have / cant use DIG, simple nslokup can force query. nslookup RECORD SERVER (ex nslookup yahoo.com 8.8.8.8).

Windows resolver (dns client) is an aggressive fella and tries to query alternate dns after 1s of not getting answer from primary one and in couple of seconds it will bomb all of them (if you have more than 2 configured) so in real life you may have some queries going to alternate server anyway without knowing it.

Focus on ensuring you can reach backup DNS and it operates properly. And if you suffer WAN outage to check DNS is alive, ask something hosted locally obviously (like internal records) so you know server actually responds, it may just have problems reaching internet for answer.

Regards
0

Featured Post

U.S. Department of Agriculture and Acronis Access

With the new era of mobile computing, smartphones and tablets, wireless communications and cloud services, the USDA sought to take advantage of a mobilized workforce and the blurring lines between personal and corporate computing resources.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Possible fixes for Windows 7 and Windows Server 2008 updating problem. Solutions mentioned are from Microsoft themselves. I started a case with them from our Microsoft Silver Partner option to open a case and get direct support from Microsoft. If s…
A safe way to clean winsxs folder from your windows server 2008 R2 editions
In this video, we discuss why the need for additional vertical screen space has become more important in recent years, namely, due to the transition in the marketplace of 4x3 computer screens to 16x9 and 16x10 screens (so-called widescreen format). …
This tutorial will walk an individual through the steps necessary to install and configure the Windows Server Backup Utility. Directly connect an external storage device such as a USB drive, or CD\DVD burner: If the device is a USB drive, ensure i…

920 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

15 Experts available now in Live!

Get 1:1 Help Now