Hello Julien and Daniel,
Thank you for your clarifications.
I will be using this scenario for setting up an HA configuration with two kamailios in different machines, a replicated DB and two IPs that can jump between machines. I think i'll fix this with a script that will periodically check IPs in the host and only add add to dispatcher destinations URIs with sockets that belong to the host. That way i won't be dependent on the probing (we have some peers who don't accept probing) to see if the IP belongs to the machine and i won't have problems at the time Kamailio chooses a destination.
What do you think?