Hi Marek,
Do you have the multicast optimizations enabled ? 2014.3.0 still has a known bug causing these optimizations to harm multicast traffic. Either disable this feature or upgrade to something newer than 2014.3.0.
IThanks for your reply. Multicast optimizations are disabled, but we ha ve multicast related errors in the logs: br-mesh: Multicast hash table chain limit reached: bat0br-mesh: Cannot rehash multicast hash table, disabling snooping: bat0, 201, -22 Regardsbjo -- xmpp bjo@schafweide.org