switching query-source address on timeout and exhaustion of available servers

[Mark Andrews]

> On 12 Nov 2007, at 22:59, Mark Andrews wrote:
> 
> > 	BIND 9.4 and server
> 
> doesn't that require that I know in advance what routing problems my  
> provider will have? I only discovered the latest because my alleged- 
> spam report showed senders that appeared genuine, and a further search  
> showed that their domain could not be resolved (MX or A). I have  
> anyway installed 9.4.1-P1 a few hours ago on my domain server, as a  
> test. Apart from a small bug, it seems fine.
> 
> Thanks
> 
> Giuliano

	There are plenty of configurations where you know you can
	only reach certain servers over particular links.

	For the general case you need your external routers changing
	RA's based on link status in IPv6 and/or you need to ensure
	that your route annoucements get advertised and/or you need
	to run a NAT.  The however is getting way out of scope for
	bind-users.

	In general this should all be left to the OS to sort out.
	That way *all* applications work.

	Mark
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org