UDP packet not forwarded by bridge

RouterOS General
1

I have a bridge to connect Wifi to LAN:

I am sending a UDP packet from a Wifi device to a multicast address. I think the fact that it’s a multicast address should make no difference because the bridge is layer 2, right?

I can see the packet on the Wifi interface:

I can see the packet on the bridge “interface”:

(That’s a different source port because I took the screenshots with a different packet.)

But I cannot see the packet on the LAN interface:

What can be the problem?

2

The only way I’m able to reproduce this behavior with exactly those symptoms is a bridge filter dropping either multicast in general or 01:00:5e:00:00:01 as dst-MAC address (which would correspond to your multicast group 239.0.0.1).

Are you sure there’s no bridge filter active?
-Chris