>>>>> "David" == David Botham writes:

David> By default named will send notifies to all name servers
David> listed in the NS RR set for a given zone, except for the
David> name server listed in the dname field of the SOA RR,
David> regardless of whether named loaded the zone as a master or
David> slave. This behavior is driven by RFC 1996.

David> You probably don't want the slave(s) sending the notify.

Nope. Switching this off can be harmful. Suppose Slave A has lost
connectivity to the master server but could have received a NOTIFY and
done a zone transfer from Slave B. Would it be better for A to hand
out stale data for the zone or retrieve an up-to-date version from B?
Leaving NOTIFY switched on -- BIND's default behaviour -- is harmless.