Expired Zone "Recovery" Process

[colin.kopp at gmail.com]

Assume a master name server goes away and the slave name server
eventually expires the zone.

When the master name server comes back up does it send a NOTIFY to
each of the slaves?

 If yes - what does the slave do given that the zone has
 expired?  Does it ignore the NOTIFY because it has no
 knowledge of the zone (effectively the slave has deleted
 all knowledge it had of the the zone) or does it
 accept the NOTIFY and action it?

 If no - then presumably one would have to do an reload of
 the zone or a restart of the slave to pick up its
 "authoritativeness" (;-)) again.  Is that a fair statement?


I check a number of newsgroups for an answer and looked at an
older version of the "DNS and Bind" book but couldn't find
an answer to this.  If there is a reference on this somewhere
I would appreciate it.

Thanks in advance.

Cheers

./CK