DNS with round robin OFF

[Guest]

How does DNS handle 2 duplicate HOST entries when round robin is turned off?

Which record does it use?

-thanks,
Rob

 

[Ace Fekay [MVP]]

In

How does DNS handle 2 duplicate HOST entries when round robin is
turned off?

Which record does it use?

-thanks,
Rob

It will use netmask ordering (subnet prioritization). Whatever subnet is
equal to the querying client's subnet. Otherwise, it will pick the first one
created in the list.

http://www.winnetmag.com/Article/ArticleID/27027/27027.html

--
Regards,
Ace

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Ace Fekay, MCSE 2003 & 2000, MCSA 2003 & 2000, MCSE+I, MCT, MVP
Microsoft Windows MVP - Windows Server - Directory Services

Security Is Like An Onion, It Has Layers
HAM AND EGGS: A day's work for a chicken;
A lifetime commitment for a pig.

 

[Jonathan de Boyne Pollard]

R> How does DNS handle 2 duplicate HOST entries when round robin is
R> turned off? Which record does it use?

"It"? There is no "it". The DNS is a distributed heterogeneous
system. There are many different DNS Clients (Microsoft's DNS Client;
ISC's BIND's DNS Client; Dan Bernstein's DNS Client; my DNS Client; the
various private hand-rolled DNS clients in applications programs like
squid and Postfix; and so forth), all of which may be configured to
operate in different ways. (ISC's BIND's DNS Client has a "sortlist"
directive, for example, which will cause resource record sets to be
sorted into proximity order by the DNS Client itself.)

The proxy DNS servers that the DNS Clients talk to may, according to
which server software is employed and how it is configured, also
re-order resource record sets in various ways.

There is no "it".