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IGMP Snooping Ubiquiti Unifi

IGMP Snooping Ubiquiti Unifi

Recently I had some legacy hardware applications that required a multicast heartbeat back to clients on the same wifi network. These were specialized tools from GM that technicians used to connect to vehicles for diagnostics back to GM. GM calls them the MDI (Multiple Diagnostic Interface).

 

I had a problem using Ubiquiti Unifi controller stable (2.4.6 at the time of writing). Apparently, it doesnt allow IGMP Snooping to be disabled (or at least I could not for the life of me figure it out). I did find a little FAQ from the admins that shows the process of doing this, although this is not terribly documented anywhere clearly.

 

First.
You need to be running the BETA version of the controller (puts you up into v3.x[3.1.9 at the time of writing])
I was running stable v.2, so I did this on my Ubuntu box (dont worry, Ubiquiti is nice enough to save settings):

sudo apt-get remove unifi
sudo apt-get update
sudo apt-get install unifi-beta

Second.
You use vi to create a file in the [UniFi base]/data/sites/the_site called config.properties.

vi /usr/lib/unifi/data/sites/default/config.properties

config.igmpsnoop_enabled.[ssid]=false

Third.
You reboot that server, and enjoy multicast.

sudo reboot

References:
Unifi Beta FAQ
Unifi Beta Install (link to other blog who was kind enough to post the notes.. since they are tough enough to find digging through forums.)