[dns-wg] Analysis of NSD

Jay Daley <td at nominet.org.uk>:

> As it happens we use probing not NOTIFY since it gives a greater level of 
> control over the number of secondaries being updated at once (and the 

NOTIFY already specifies precautions against a 'rush', although implementations
may differ and depending on the size of the zone 'at once' may have different
meanings.

> bandwidth) and the order in which they are updated.  This does rely on 
> strict calculations of the timings of changes and probes but that is 
> fairly easy to do.

How about sending the NOTIFY messages out of band instead of relying upon
retry (and not refresh?)? There's a little 'DoS' potential, though.

-Peter