[Pdns-users] Re: Pdns-users Digest, Vol 46, Issue 17

[Juergen Ilse]

Hello,

> ----------------------------------------------------------------------
> Message: 1
> Date: Wed, 22 Nov 2006 14:13:23 +0200
> From: "Richard Mayhew - Nashua Mobile Broadband Division"
> 	<richardm at nashuamobile.com>
> Subject: [Pdns-users] DNS Round Robin
> To: <pdns-users at mailman.powerdns.com>
> Message-ID:
> 	<6EF1ADD721B23F4A98BC2CD2C1FA58226279EC at NashuaMB-002.nashuabroadband.local>
> 	
> Content-Type: text/plain; charset="us-ascii"
> 
> Hi,
>  
> I have a question regarding PowerDNS and DNS Round Robin/Load Balancing.
> I noticed after adding 2 CNAME entries in a domain with the same
> hostname, neither would resolve to an address. 
> Does PowerDNS support the basic RoundRobin function?
  
I think, powerdns supports "basic RoundRobin", but IIRC is it not allowed
to have a CNAME RR and an additional other RR for the same Name ...

> eg.
>  
> vpn        IN        CNAME        host1.dyndns.org.
> vpn        IN        CNAME        host2.dyndns.org.

Here, you have more than one CNAME RR for the same name. Bind9 in default
configuration will also reject a zone, when these entries are part of the
zonefile (the error-message will be "CNAME and other DATA" or something
similar). If there is a CNAME RR for a name, there really shouldn't be
*any* *other* Record for this name (neither CNAME nor NS nor MX nor any
other Records: CNAME is an "alias" for another Name,all other records
for this host should be for the name, the CNAME RR points to).

bye,
	Juergen Ilse			(juergen at usenet-verwaltung.de)