diff --git a/buildroot-external/rootfs-overlay/etc/sysctl.d/20-network.conf b/buildroot-external/rootfs-overlay/etc/sysctl.d/20-network.conf
new file mode 100644
index 000000000..ada27ebe3
--- /dev/null
+++ b/buildroot-external/rootfs-overlay/etc/sysctl.d/20-network.conf
@@ -0,0 +1,3 @@
+# Since multicast is rather popular and we have many integrations running,
+# more than the default of 20 memberships might be required.
+net.ipv4.igmp_max_memberships = 1024