Advise Requested regarding serial number for DDNS

[Kevin Darcy]

Barry Margolin wrote:

> In article <20000512105329.A3121 at dns.net>,
> Andras Salamon  <andras at dns.net> wrote:
> >On Thu, May 11, 2000 at 05:15:37PM -0700, Brian Keves - NCS UAI Contractor wrote:
> >> Each Dynamic Update seems to increment the serial number for the zone
> >> and I'm going to run out of serial numbers fast using the current
> >> strategy:
> >>
> >>                                 2000051100      ; Serial
> >> ;                               YYYYMMDDCC      ; Year, Month, Day, Count
> >>
> >> Is there a limit to the number of digits I can use for the serial number?
> >
> >Yes: it is a 32 bit integer.  If regarded as unsigned, the range is
> >0 to 2^32 - 1 =  4294967295.  If signed, then the range is -2^31 =
> >-2147483648 to 2^31 -1 = 2147483647.
>
> It's unsigned.
>
> But you can't run out, because it's allowed to wrap around.  You would only
> have a problem if more than 2 billion dynamic updates were performed
> between slave server refreshes.

See RFC 1982 for details.


- Kevin