IGMP Linux Kernel Settings

You can check the current settings like so: $ sysctl net.ipv4.igmp_max_memberships net.ipv4.igmp_max_memberships = 20 $ sysctl net.ipv4.igmp_max_msf net.ipv4.igmp_max_msf = 10 net.ipv4.igmp_max_memberships specifies the maximum number of multicast groups the host can subscribe to. net.ipv4.igmp_max_msf specifies the maximum number of multicast source filters the host will support. Dynamic Configuration To change the running configuration, use this command with your desired value: $ sysctl -w net.ipv4.igmp_max_memberships=NN $ sysctl -w net.ipv4.igmp_max_msf=NN You can confirm like so: