Servers loading zones with lower serials

[Todd Snyder]

This was a slave server hitting a master.  Both were hitting the same
master in this case.

Cheers,

Todd. 

-----Original Message-----
From: bind-users-bounces at lists.isc.org
[mailto:bind-users-bounces at lists.isc.org] On Behalf Of Barry Margolin
Sent: Wednesday, March 25, 2009 8:45 PM
To: comp-protocols-dns-bind at isc.org
Subject: Re: Servers loading zones with lower serials

In article <gqaoi6$1j7t$1 at sf1.isc.org>, "Todd Snyder" <tsnyder at rim.com>
wrote:

> Good day,
> 
> I saw some strange behaviour from BIND and am trying to understand it.
> 
> In one of the labs, someone mucked up a DNS change and made the serial

> lower than the previous version.
> 
> Some of the nameservers complained:
> 
> Mar 23 15:07:24 ns1001 named[5913]: zone 5.1.10.in-addr.arpa/IN: 
> serial number (2008030900) received from master 10.1.1.1#53 < ours 
> (2008062600)
> 
> But some others just went ahead and loaded the zone anyways.

Were they masters or slaves?  Serial number checking is only done by
slaves when checking whether they need to perform a zone transfer from
the master.

--
Barry Margolin, barmar at alum.mit.edu
Arlington, MA
*** PLEASE don't copy me on replies, I'll read them in the group ***
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