multicast_mode appears to block avahi traffic
Not sure if this is a batman-adv issue or a kernel, avahi, or openwrt issue...
I've been running OpenWrt r40555 on a handful of ar71xx routers all connected with batman-adv. Avahi has been working great across the mesh, until I updated the firmware on the routers to Barrier-Breaker 14.07.rc2 (r42087). Everything works as expected, except for the forwarding of avahi packets. Avahi now works within the space of a single router but not across the batman-adv mesh.
Batman-adv on the latest rev of OpenWrt has been updated to 2014.2.0 and introduces "multicast_mode" for the first time on OpenWrt. When I disable multicast_mode in batman-adv, my avahi traffic across the mesh works again. With the new multicast_mode enabled (batman-adv's default), avahi does not work across the mesh. It looks as though multicast_mode is blocking the receipt of mdns responses, not the sending of mdns queries.
Updated by Linus Lüssing over 7 years ago
Like Marek said, please upgrade to 2014.4.0 and let us know whether that helps. For instance just copy the feeds.conf.default to feeds.conf and remove the ";for-14.07" in the line for the routing feed in a recent barrier breaker.
Sorry for replying so late, must have missed this ticket back then.
Updated by Bill Richardson about 7 years ago
Yes, I do believe it is working now.
Following your instructions above, I have the following.
Barrier Breaker r44952
batman-adv multicast_mode enabled
mdns is crossing the batman-adv mesh with multicast_mode enabled, as expected. Looking forward to experimenting with the optimizations. Thanks Marek Lindner and @Linus!