Different Serial in Bind 8 and 9

MJ php at cyberia.net.sa
Tue Mar 22 12:27:43 UTC 2005

Ok I have read some articles. Since I have control on my Secondary DNS
server so I am doing this by first changing the serial number in primary
and then deleting all zone files on the secondary to force it reload
with correct serial numbers. Now I am getting following warning

WARNING: new serial number < old (2005032201 < 2851040847)

I assume that it is only information that the new serial is less than
the old one but it should not have any other impact, right? Please let
me know if there is some thing dangerous in this as I have around 600


-----Original Message-----
From: bind-users-bounce at isc.org [mailto:bind-users-bounce at isc.org] On
Behalf Of Gregory Hicks
Sent: Monday, March 21, 2005 9:39 PM
To: php at cyberia.net.sa
Cc: bind-users at isc.org
Subject: Re: Different Serial in Bind 8 and 9

> From: "MJ" <php at cyberia.net.sa>
> To: <bind-users at isc.org>
> Subject: Different Serial in Bind 8 and 9
> Date: Mon, 21 Mar 2005 21:00:30 +0300
> Hi,
> My primary name server is Bind 8.2. I installed a new machine as
> secondary name server with bind 9.3.1. One thing I have noticed that
> this new secondary DNS have downloaded all the zone files but the
> is different than what it is in the primary. For example on primary
> server one zone file has serial "20030322166" but on the secondary
> server same zone file has "2850452982" and also it is not getting the
> updates from the master server, whenever there is an increment in the
> serial of master, it does effect the secondary.


Your serial number "over-flowed" - as in the number is too large.  The
serial number computations are performed using 32 bit arithmetic. 

Your serial has 11 digits.  I would limit the serial to YYYYMMDDXX (10
digits).  This gives you up to 100 updates per day (00-99).

There are multiple discussions in the list archives on how to recover
from this.  (In other words, I don't know how to do so right off the
top of my head.)

Gregory Hicks

> Any help will be highly appreciated.
> MJ

Gregory Hicks                        | Principal Systems Engineer
Cadence Design Systems               | Direct:   408.576.3609
555 River Oaks Pkwy M/S 6B1          | Fax:      408.894.3400
San Jose, CA 95134                   | Internet: ghicks at cadence.com

I am perfectly capable of learning from my mistakes.  I will surely
learn a great deal today.

"A democracy is a sheep and two wolves deciding on what to have for
lunch.  Freedom is a well armed sheep contesting the results of the
decision." - Benjamin Franklin

"The best we can hope for concerning the people at large is that they
be properly armed." --Alexander Hamilton

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