[dns-operations] Recommended zone serial number format for over 100 changes / day

Colm MacCárthaigh colm at stdlib.net
Mon Apr 4 03:44:41 UTC 2016

On Sat, Apr 2, 2016 at 1:42 PM, Andrew Sullivan <ajs at anvilwalrusden.com>

> If I as the slave reject the unknown RRTYPE at that point, then I have
> to fail the zone transfer.  Now, the zone is broken compared to what
> the zone administrator wanted in two ways.

Not quite, it's out of date - but not broken. That's much better. Imagine
accepting a DNAME but not occluding - it would be terrible to serve it.
Much better to refuse the transfer, use the stale version of the zone, and
let an administrator decide what's best.

> On the slave, the zone is not up to date and will eventually fail because
> of
> the inability to transfer.

It needn't.

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