DDNS, Notify and IXFR
mohta at necom830.hpcl.titech.ac.jp
Sun Aug 15 21:51:49 UTC 1999
> > The issues Kevin raised are not the fault of the IXFR protocol.
Thank you. It's a problem between DDNS and NOTIFY.
> > They are due to interactions between BIND's implementations of
> > deferred serial number update, NOTIFY, and IXFR. Changing the
> > implementation, for example by rate-limiting NOTIFY generation, should
> > solve the problem.
> notify is supposed to be rate-limited (its rfc recommends this, anyway).
> some parts of bind (like after the master has reloaded) have a delay,
> but other parts don't, and neither part rate-limits. 8.2.2 will fix this.
If update is done 4 times a second, it is likely that reference to
the updated and unupdated data is referenced a lot more frequently.
Instead, we can simply conclude that we can increment serial number as
frequently as we want, for which purpose, UDP IXFR is specified.
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