diff --git a/defaults/main.yml b/defaults/main.yml
index 7d440214..1b0f2f2b 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -104,6 +104,7 @@ openstack_kernel_options:
   - { key: 'net.bridge.bridge-nf-call-ip6tables', value: 1 }
   - { key: 'net.bridge.bridge-nf-call-iptables', value: 1 }
   - { key: 'net.bridge.bridge-nf-call-arptables', value: 1 }
+  - { key: 'net.ipv4.igmp_max_memberships', value: 1024 }
   - { key: 'net.ipv4.neigh.default.gc_thresh1', value: "{{ set_gc_val | int // 2 }}" }
   - { key: 'net.ipv4.neigh.default.gc_thresh2', value: "{{ set_gc_val | int }}" }
   - { key: 'net.ipv4.neigh.default.gc_thresh3', value: "{{ set_gc_val | int * 2 }}" }