Is there a known issue conerning the DAT functionality in batman-adv 2014.4.0?
I have got a problem with looping ARP packets / multiplication of ARP packets causing ARP storms in a setup with enabled DAT and BLA. My setup consists of 6 mesh nodes of which 3 are connected to the same backbone network. I connected a PC to the backbone which has an open ssh connection to one ot the mesh nodes not connected to the backbone network directly. Using arp -d to delete the ARP cache of the Windows PC forces the PC to send an ARP request to the mesh node used for the ssh session. I can then see multiple copies of that ARP request in the backbone in a wireshark recording and also multiple ARP replies from the mesh node. Sometimes also BLA gratuitous ARP telegrams seem to be looping, but it's easier to force this behaviour with regular ARPs (via arp -d on a PC). Non-ARP telegrams don't seem to be affected and except the waste of bandwith in the mesh and backbone I don't have problems with normal network communication in the mesh.
I could provide the mentioned wireshark recordings made in the backbone network with a switch using port mirroring if someone explains how to provide such a file to the mailing list (I guess simple attachments are not allowed?).
If I disable DAT, everything looks fine again, i.e. no duplicated ARP telegrams anymore (except for a few ARP replies from the mesh node which are received twice, which could be a race for claiming the device?)..
Regards, Andreas
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