dns based loadbalancing/failover

Sun Oct 7 10:34:26 UTC 2001

On Sat, Oct 06, 2001 at 08:32:19PM -0700, Paul Vixie wrote:

> > But the main question is, if this is "broken.", please elaborate what
> > exactly "breaks."
> 
> I take it that unless I can point to some specific situation in which some
> specific application or user community is negatively impacted by this,
> you'll go on assuming that this deviant behaviour is merely an exercise in
> creativity.

The way to go about this is to see if breaking existing practice will break
current implementations and plausible future implementations.

> If that's not the case, though, consider that a correct implementation of
> DNS would be within its rights to take note of the "same serial number but
> incoherent answers" condition and declare the zone unreachable.  I'm not

Would be pretty silly, and overstepping the robustness principle.

> DNS is about fact, not value -- it's about mechanism, not policy.
> 
> No matter how you slice it, intentionally incoherent DNS zones are "broken."

So by your logic, by making sure that the serial numbers never match, we
would 'unbreak' the situation? Seems like a step in the wrong direction.

Regards,

bert

-- 
http://www.PowerDNS.com          Versatile DNS Software & Services
Trilab                                 The Technology People
Netherlabs BV / Rent-a-Nerd.nl           - Nerd Available -
'SYN! .. SYN|ACK! .. ACK!' - the mating call of the internet