Multiple NS RR's

[Mark_Andrews at iengines.com]

	It's perfectly possible at the protocol level.  There is
	no requirement at this level for the reverse mappings to
	exist.

	Operationally however it is often confusing however.
	Registries often restrict the number of names that map to
	a single IP address to one.  e.g. the Internic only accepts
	a single mapping.

	In practice it is better to select a single name for a
	server and use it exclusively.

	Mark

> 
> Hi,
> 
> Is it possible to have multiple NS RR's pointing to a single IP?  
> 
> An example of I'm talking about would be like this:
> 
> The in-addr for 192.168.1.20 is hostA.mydomain.com and the in-addr for
> 192.168.1.25 is hostB.mydomain.com.
> 
> I would like to do primary for three domains like this...
> 
> for domain #1
> 
> IN NS ns-1.domainA.com
> IN NS ns-2.domainA.com
> 
> ns-1   IN  A  192.168.1.20
> ns-2   IN  A  192.168.1.25
> 
> 
> for domain #2
> 
> IN NS ns-1.domainB.net
> IN NS ns-2.domainB.net
> 
> ns-1   IN  A  192.168.1.20
> ns-2   IN  A  192.168.1.25
> 
> 
> and domain 3 the same
> 
> IN NS ns-1.domainC.org
> IN NS ns-2.domainC.org
> 
> ns-1   IN  A  192.168.1.20
> ns-2   IN  A  192.168.1.25
> 
> 
> Basically, does the in-addr record have to match the forward for a NS
> entry for lookups to work properly?  BIND version running would be 8.x
> 
> -- 
> Keith E. Hermansader                 Master Lumberjack
> Unit 1951, The Lumber Cartel(tinlc)  Northeast PA Chapter
> I am a Lumberjack and I'm OK
> 
--
Mark Andrews, Internet Engines Inc. / Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at iengines.com