diff --git a/buildroot-external/rootfs-overlay/etc/sysctl.d/60-otbr-ip-forward.conf b/buildroot-external/rootfs-overlay/etc/sysctl.d/60-otbr-ip-forward.conf
new file mode 100644
index 000000000..ebddeaa66
--- /dev/null
+++ b/buildroot-external/rootfs-overlay/etc/sysctl.d/60-otbr-ip-forward.conf
@@ -0,0 +1 @@
+net.ipv6.conf.all.forwarding = 1