I've always been a huge supporter of Meraki, but I haven't been able to get a DM NVX system working reliably. I have IGMP snooping turned on and flood control on, however once I patch in a decoder and the multicast traffic starts hitting my network it takes it completely down (not just in it's VLAN, but it ramps the CPU of my MX up to 100% and packet loss hits 100%). I did get one encoder and decoder working perfectly for about a week then just out of the blue, it started ramping up the CPU again and haven't gotten it to work since (no network config, firmware, DM NVX firmware or config had been changed).
I took to Reddit to see if there was any solution for Meraki and DM NVX and basically was just met with, it is a known issue and you can't use DM NVX on a Meraki network... which since I'm rocking a Meraki full stack, isn't really an option for me.
Reddit Link: https://www.reddit.com/r/crestron/comments/jcl2p8/dm_nvx_with_meraki_switches/