Hi, On Wed, Mar 24, 2021 at 12:16:16PM -0000, oytunyapar(a)hotmail.com wrote: When there is just a single neighbor on the interface a node received the packet on that batman-adv avoids sending it back automatically. E.g. this case here: https://www.open-mesh.org/projects/batman-adv/wiki/Broadcast#IIII-Single-Ne… If there are multiple neighbors on the receiving interface then batman-adv assumes that other neighbors might potentially not have received the packet from the original sender. And will therefore rebroadcast on the incoming interface, too. If you are 100% sure that all other neighbors received it from the original sender then there is this old patch which isn't upstream though (including the discussion with why it was rejetected for upstream): https://patchwork.open-mesh.org/project/b.a.t.m.a.n./patch/1380030033-11533… Regards, Linus