diff --git a/cluster/ansible/README.md b/cluster/ansible/README.md
index d0b77ac4..96252e0b 100644
--- a/cluster/ansible/README.md
+++ b/cluster/ansible/README.md
@@ -4,6 +4,12 @@
 
 ## Pre-settings for each node
 
+### Enable br_netfilter module for Kernel
+
+We need enable br_netfilter module for each node's kernel.
+
+Using command `modprobe br_netfilter` on each nodes to enable it.
+
 ### Enable HugePage on node's kernel
 
 ```bash