Chained notifies

[Rodney Joffe]

Mark.Andrews at isc.org wrote:

> > In my configuration I have a bind 8 server (server A) established in a
> > dmz. I have a bind 8 server operating as a master in the open Internet
> > (server B). And I have a third bind 8 server behind a firewall in
> > rfc1918 address space (server C). I have a tunnel between server A and
> > server C, both of which function as slaves.
> >
> > A zone in Server B is modified. Server B sends a notify to Server A.
> > Server A, using tsig, performs a transfer from Server B. Having
> > completed the transfer, I need server A to send a notify for the changed
> > zone to Server C.
 
>         If C is a listed nameserver then it should just work provided
>         you have up to date versions.  Otherwise use notify-also on A.

Thanks for the response. However...

The issue as I see it is that if Server B sends a notify to Server A and
Server C, at approximately the same instant, and the zone is larger
than, lets say, a packet or two, then when Server A looks at Server C,
the serial will not yet have changed, because the zone is just starting
to transfer. How do I get Server C to notify server A, after it has the
new complete zone, even though it is a secondary as well?

Thanks again.

/rlj