L2 multicast, where to place igmp querier

[backhausenm]

Hi,

question to igmp and querier in a L2 network. Assuming snooping is enabled on all switches.
Querier sends query to 224.0.0.1 which is forwarded out all ports by switches by default.
Receiver answers with host membership report to the group beeing reportet.

Question:
How does switch1 sees host membership report from receiver to send mc traffic to switch3?
 

sender --- switch1 --- switch3 (querier)
                                        |

                                        |
receiver --- switch2 -----

Thanks,

Matthias

[Jaime Valencia]

This is Video Over IP, please move to a relevant area.