Changing... serial number back in the past.

Kevin Darcy kcd at
Thu Oct 5 21:24:53 UTC 2006

aad wrote:
> On 10/5/06, Dawn Connelly <dawn at> wrote:
>> You'll need to delete the copy of the zone file on the slave servers. Otherwise
>> they will not pull over the correct serial number.  Remove, reload, and you are
>> all set.
> Or, if you don't want to have to stop the slave servers, you could
> simply set the serial number to 0 on the master server and wait for
> all the slaves to pick it up. Then, reset the serial on the master to
> the desired value.
Bad advice. Unless the slaves see the master's serial number as "higher" 
than their own, they'll never transfer the zone. One could wait for that 
replication indefinitely.

Read RFC 1982 to see how serial number arithmetic really works. A 
"reset" is possible, but setting the serial to 0 isn't always the way to 
accomplish it.

                                 - Kevin

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