Hi,
Thank you for your help, as I did not subscribe to the mailing list, I did not get your reply. I subscribe to the mailing list now and I am writing a new email thread.
apologies, was not aware of that.
When modem at gateway (for WAN uplink) is down and loses internet connection (but batman-adv connections with clients are good and dhcp server works good), can batman-adv clients know that internet connection is lost and "roam" to another gateway with good internet connection?
Seems you are looking for this: https://www.open-mesh.org/projects/batman-adv/wiki/Gateways
Kind regards, Marek