Carp questions

[Trond Endrestøl]

On Thu, 11 Oct 2018 07:25-0400, Mark Saad wrote:

> I am running into two carp questions I can’t easily find an answer 
> too . Before I go off and try to break stuff I figured i’de ask if 
> anyone has tried this and has any pointers .
> 
> Issue one : adding more user defined bits to the custom carp Mac . 
> So this is not all that common but in some cases you can have two 
> pairs of carp servers with overlapping vhids that eventually cause 
> trouble with each other.  Has anyone tried this ? I am ok with 
> random-ish mac’s like how crossbow does this on illumos .

Maybe someone else can answer this.

> Issue two: one way carp fail over . For example node a and b are 
> carp partners . Node a crashes node b takes over but there is no 
> automatic fail back when node a recovers . I can’t find a way to do 
> this in 11.x . I am stumped anyone have any built into magic for 
> this ?

I run doubly DHCP servers using CARP, and I have 
net.inet.carp.preempt=1 in /etc/sysctl.conf on the master only.

-- 
Trond.