MS Firmware 10.x multicast drops

TFreer
Comes here often

MS Firmware 10.x multicast drops

We have a PIM-SM network set up for informacast. After upgrading to 10.19 and 10.20 from the 9.x firmware, my endpoint devices do not receive the multicast traffic. doing packet captures I can see the multicast traffic go into the uplink interface of the meraki switch but it never reaches the client port the device is connected to. 

 

In the 9.x firmware I have IGMP Snooping disabled and Flood Multicast packets enabled for the whole network and this worked. Same settings in 10.x do not work. 

 

Has anyone else seen this issue?

3 REPLIES 3
PhilipDAth
Kind of a big deal

There have been a lot of changes in 10.x. What happens if you enable IGMP snooping in this code release?

I tried that. It helps my IP phones receive my MCast but it kills my IP speakers. If I turn it off again the speakers recive the MCast but not the phones. I have had this problem before with the speakers not supporting IGMP Snooping but as I said both speakers and phones worked with snooping off and flood on in the 9 firmware.

PhilipDAth
Kind of a big deal

It sounds like the speakers are not sending IGMP join requests.  Any chance there is a firmware upgrade for them?

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