My round-robin not behaving

[Mark_Andrews at isc.org]

> Experts,
> [BIND 8.2p1, Solaris 2.6]
> 
> I have:
> 	foo		IN	A	1.2.3.4
> 	foo		IN	A	5.6.7.8
> 
> I expect to see
> >foo
> Name:    foo.blat.com
> Addresses:  1.2.3.4, 5.6.7.8
> 
> >foo
> Name:    foo.blat.com
> Addresses:  5.6.7.8, 1.2.3.4
> 
> and back and forth, REGULARLY.  This is not the case.  I see 1-to-1, 2-to-2, 
> 2-to-3, 1-to-3 round-robin and the behavior is completely unpredictable.  Is 
> there a randomizing switch somewhere that I have overlooked?
> 
> QCT
> 
> 
> 

	BIND 8.2 onwards randomly picks the start of the cyclic response.
	This is statistically idential to the old behaviour. 

	Note: on BSD based boxes the random number generator used does not
	modify the LSB of the number returned.  BIND 8.2.2 codes around
	this misfeature.

	Mark
--
Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org