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New Member

MultiCast - Sennheiser LSP 500 in combination with cisco WLC´s


we´re trying to get a Sennheiser LSP 500 Active loudspeaker with WLAN support, up and running in our network. ( (handbook: 

the loudspeakers are controllable over an iPAD. the Manual mentions that it uses multicast to connect the iPAD and the box, the standard multicast address is: port 1234

Even If I connect the ipad and the box with the same wireless network, and have nothing fancy configured - the device´s won´t connect to each other. 

does anybody got an idea how this setup might work? 


WLC 5508, running code

3502i AP´s

Both the box and the iPad are connected to the SAME SSID and are pingable. 

thanks alot for your insight! 

Everyone's tags (1)
New Member

If you do not have multicast

If you do not have multicast support enabled\configured on your WLAN controller likely this is where your issue is. You will need to configure multicast to use this even if the devices are in the same VLAN.

The wireless multicast traffic will not behave like standard multicast traffic in a L2 network where the switch will either use IGMP snooping to forward multicast streams to "listening ports" or flood the traffic if IGMP snooping is not enabled.

To fix the issue, enable multicast support on your controller – it’s actually only a few steps for a basic setup, the only caveat may be the multicast distribution part of it – this is how the controller gets the multicast traffic to the Aps. You can do unicast mode or multicast mode. Without getting into too many details check out the link below from Cisco on how to enable support for apple bonjour service which requires multicast support and has the steps you need and explanations to follow.

You should be able to grab the bits and pieces you need for your setup from that doc – in essence:

  • Enable multicast globally
  • Enable IGMP snooping
  • Enable the controller to send multicast traffic to the Aps

There is a Cisco live presentation on this as well to get the basics covered.