Zone serial number on DDNS - how is it handled?

[Mark.Andrews at nominum.com]

> 
> Hi,
> 
> Does anyone have any knowledge on how zone serial numbers work on
> Dynamic DNS? We have non-dynamic BIND 8.2.2 servers running using the
> YYYYMMDD## serial number format. When a dynamic update is done, what
> happens to the serial number? Is it incremented by 1? Likewise when an
> update is performed using NSUPDATE, how is the serial number changed?

	They are incremented by one by the server, unless you update the
	SOA record with a bigger serial number jump.
> 
> If the existing serial number is incremented by a DDNS or NSUPDATE
> update, is there any way we can reset our serial numbers to a plain old
> zero when we start allowing dynamic updates?

	This sentence makes no sense.  You have to allow updates to
	occur first.  There is no need to reset serial numbers.

	Mark
> 
> Thanks for any guidance you can lend!
> 
> Ray
> 
> 
--
Mark Andrews, Nominum Inc.
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at nominum.com