Solved

DNS Round Robin

Posted on 1997-11-07
6
629 Views
Last Modified: 2013-12-23
I would like to have two NIC´s in a Unix Server, configured with two different IP addresses so I can balance net traffic.
However, I need to find a way to configure my DNS servers to alternate, in a round robin fashion, the address they give to the clients when they request a name.

How do I do that?

Thanks.
0
Comment
Question by:estevaf
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
6 Comments
 
LVL 5

Expert Comment

by:n0thing
ID: 1582895
I don't know which version of bind/named you're using or the
platform. But by default, it's Round Robin on Solaris & AIX 3.2.5. I've to rebuild named to disable Round Robin in my case.
Let me know which version & platform you're running your DNS on.
By default, round robin is on on most of the named I've seen so far.

Regards,
Minh Lai
0
 

Accepted Solution

by:
Rodney110897 earned 300 total points
ID: 1582896
The best way to do this is by using CNAME's:

card1        A         192.168.1.1
card2        A         192.168.2.1

unix         CNAME     card1
             CNAME     card2


After refreshing the nameserver check this by pinging 'unix' a few times, it should alternate between card1 and card2.

0
 
LVL 1

Expert Comment

by:Joshua111197
ID: 1582897
Please tell, if the above works. In my opinion the ping would
reach only card1, beacuse this is the first entry thas is
found. But perhaps I'm wrong...
0
NEW Veeam Agent for Microsoft Windows

Backup and recover physical and cloud-based servers and workstations, as well as endpoint devices that belong to remote users. Avoid downtime and data loss quickly and easily for Windows-based physical or public cloud-based workloads!

 

Expert Comment

by:paulroberts
ID: 1582898
The proper way to do DNS round-robin is to use A records rather than CNAME's, e.g.

server1 IN A 192.168.1.1
server1 IN A 192.168.2.1
0
 

Expert Comment

by:pvenezia
ID: 1582899
Best solution:
*host file*
servername       IN   A    192.168.1.1
                 IN   A    192.168.1.2

*rev file*
1          IN         PTR    servername.domain.com
2          IN         PTR    servername.domain.com

0
 

Expert Comment

by:grantk
ID: 1582900
According to the BOG (Bind Operators Guide):
       hydra           cname        hydra1
                       cname        hydra2
                       cname        hydra3
       hydra1          a            10.1.0.1
                       a            10.1.0.2
                       a            10.1.0.3
       hydra2          a            10.2.0.1
                       a            10.2.0.2
                       a            10.2.0.3
       hydra3          a            10.3.0.1
                       a            10.3.0.2
                       a            10.3.0.3

Note that there are two round robin rotations going on: one at ("hydra",CNAME) and one at each ("hydra1",A) et al.  I used a layer of CNAME's above the layer of A's to keep the response size down.  If you don't have nine addresses you probably don't care and would just use a pile of CNAME's pointing directly at real host names
0

Featured Post

Free NetCrunch network monitor licenses!

Only on Experts-Exchange: Sign-up for a free-trial and we'll send you your permanent license!

Here is what you get: 30 Nodes | Unlimited Sensors | No Time Restrictions | Absolutely FREE!

Act now. This offer ends July 14, 2017.

Question has a verified solution.

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

When it comes to security, there are always trade-offs between security and convenience/ease of administration. This article examines some of the main pros and cons of using key authentication vs password authentication for hosting an SFTP server.
When you try to share a printer , you may receive one of the following error messages. Error message when you use the Add Printer Wizard to share a printer: Windows could not share your printer. Operation could not be completed (Error 0x000006…
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…
This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're looking for how to monitor bandwidth using netflow or packet s…

695 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