Binding to non-local interfaces

Terry Burton tez at terryburton.co.uk
Fri Oct 22 17:35:26 UTC 2010


On Fri, Oct 22, 2010 at 5:46 PM, Michael Graff <mgraff at isc.org> wrote:
> On 2010-10-22 11:21 AM, Terry Burton wrote:
>> With the host-based examples that I have seen on Linux, VRRP runs
>> between a set of hosts on the same VLAN and executes ip addr add/del
>> with specified the virtual address parameters optionally followed by
>> running a script. Hence IP addresses may spontaneously appear.
>
> BIND does re-scan the local interfaces and will start listening on new
> ones if configured to listen on all interfaces.

Understood, but I believe that the rescan time is of the order of minutes.

> I'm not quite certain of the behavior if a listen-on interface is being
> added and removed dynamically.

listen-on appears to act as a filter on the available interfaces.

Perhaps a simpler solution would be an rndc rescan-interfaces
directive which provides immediate results whist avoiding the cost of
reloading the zones?



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