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DNS zones

Posted on 2008-10-23
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Last Modified: 2012-05-05
Please can any one let me know if I need to add the following zones to the ns0.xxx.com and ns1.xxx.com from requesting the zones from primary dns  ns0.clientxxx.com ?

Zones as,
xxx1.co.uk
xxx2.co.uk
xxx3.co.uk
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Question by:prashndip
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4 Comments
 
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Expert Comment

by:bevhost
ID: 22795149
From:
http://en.wikipedia.org/wiki/Domain_name_system

Name servers in delegations appear listed by name, rather than by IP address. This means that a resolving name server must issue another DNS request to find out the IP address of the server to which it has been referred. Since this can introduce a circular dependency if the nameserver referred to is under the domain that it is authoritative of, it is occasionally necessary for the nameserver providing the delegation to also provide the IP address of the next nameserver. This record is called a glue record.
For example, assume that the sub-domain en.wikipedia.org contains further sub-domains (such as something.en.wikipedia.org) and that the authoritative name server for these lives at ns1.something.en.wikipedia.org. A computer trying to resolve something.en.wikipedia.org will thus first have to resolve ns1.something.en.wikipedia.org. Since ns1 is also under the something.en.wikipedia.org subdomain, resolving ns1.something.en.wikipedia.org requires resolving something.en.wikipedia.org which is exactly the circular dependency mentioned above. The dependency is broken by the glue record in the nameserver of en.wikipedia.org that provides the IP address of ns1.something.en.wikipedia.org directly to the requestor, enabling it to bootstrap the process by figuring out where ns1.something.en.wikipedia.org is located.
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Author Comment

by:prashndip
ID: 22801488
Hi, thanks for your reply but  I would like to know if I need to add the following zones to the ns0.xxx.com and ns1.xxx.com from requesting the zones from primary dns  ns0.clientxxx.com  then what I need to do?
Which steps do I need to follow to solve this issue? We are using DNS server with BIND.

Zones as,
xxx1.co.uk
xxx2.co.uk
xxx3.co.uk
0
 
LVL 19

Expert Comment

by:bevhost
ID: 22801592
Please provide more information

who is ns0.xxx.com?

what are the relationships between these zones?
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Accepted Solution

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prashndip earned 0 total points
ID: 22915768
Sorry, I was on holidays and would like to leave this question.
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