diff --git a/ocs/diag_note.md b/ocs/diag_note.md
index 1d91fea..2e07874 100644
--- a/ocs/diag_note.md
+++ b/ocs/diag_note.md
@@ -1,3 +1,6 @@
+0. 根据需求对节点执行power cycle
+    ipmitool power cycle
+
 0. 设置topo
     python3 ocsdiag.py -i 10.57.216.95,10.57.216.96,10.57.216.97,10.57.216.98 -e 2,4,6,8 -c topo-config -p 32