Updating bind serial numbers automatically
Slave name servers will load this new data sometime within the time interval defined in the SOA record for refreshing their data.
The way that always works with all versions is to purge your slaves of any knowledge of the old serial number.
The next modification that day would change the serial number to 1997011501. It also has the advantage of leaving you an indication in the zone data file of when you last incremented the serial number.
What do you do if the serial number on one of your zones accidentally becomes very large and you want to change it back to a more reasonable value?
However, even when you use a tool, it is critical to know what goes on when the files are updated, so we'll start with the manual method.
After creating your zone data files initially, it should be fairly apparent what you need to change when you add a new host.
The reload induces the name server to refresh all of its slave zones.