CARP demotion counter

[Julien Cigar]

On Thu, Dec 10, 2015 at 08:27:56PM +0100, Terje Elde wrote:
> 
> > On 10 Dec 2015, at 20:00, Emmanuel Vadot <manu at bidouilliste.com> wrote:
> > 
> > You need net.inet.carp.preempt=1 for MASTER returning to MASTER after a BACKUP state.
> 
> If all things are otherwise equal, I've come to favor having redundant equipment not be designated master/slave, but rather "router 1" and "router 2" etc, where possible. 
> 
> It reduced "oh, the other is just backup"-impulses, promotes caring equally for either box, and reduces the idea of failover and fallback being separate things. 
> 
> Also removes "we need to fail back to the master" as a thing to do after a failover, while the equality makes it easier to do changes as a matter of routine. 

You're right, fundamentally I don't have any problem which box is the
MASTER or the BACKUP as long as the CARP failover is done properly
(which is the case). 

It's just that I would like to understand why the demotion counter is 
greater than 0 at boot and why the MASTER doesn't return when the cable
is re-plugged (which is the expected behavior I think) :)

> 
> Terje
> 
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Julien Cigar
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