[dns-operations] Experience with DDNS (RFC 2136)

Wolfgang Nagele wnagele at ripe.net
Fri Oct 7 18:22:15 UTC 2011

Hi Simon,

I don't think that Jan-Piet was referring to DDNS to update slaves in his original mail. For us, we only use DDNS to "edit" our zones - fan-out is done via IXFR/AXFR.


On Oct 7, 2011, at 17:08, Simon Munton wrote:

> In the case of a master server updating slaves, its much more common to use NOTIFY+IXFR. I would have thought that D/DNS would have niche uses, for example where there are multiple sources of updates to a zone (e.g. PCs reporting their LAN IP Address) or where you only want to update individual records (e.g. DynDNS scenario - very similar to the LAN example).
> But for updating slaves, I would have thought D/DNS has no advantage over NOTIFY+IXFR, but N+I has the advantage of being more tolerant of interruptions to the connectivity and has the ability to fall back to AXFR for recovery scenarios.
> That said, I would imagine that for sending updates from the registry database to the master in the first place D/DNS would probably be used.

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