diff --git a/docs/en/docs/Virtualization/environment-preparation.md b/docs/en/docs/Virtualization/environment-preparation.md
index b9c39a0897156e257aca2b00c1e628b2fb393ce5..93d59930cdbbd4b120b6013b0c2b576856b23d7b 100644
--- a/docs/en/docs/Virtualization/environment-preparation.md
+++ b/docs/en/docs/Virtualization/environment-preparation.md
@@ -245,6 +245,9 @@ The following describes how to set up an Open vSwitch layer-1 bridge br0.
     ```
 
 4. Assign an IP address to OVS bridge br0.
+    > ![](./public_sys-resources/icon-note.gif) **illustrate：**
+    > 
+    > If you use DHCP to set a dynamic IP address for br0, you need to clear the existing dynamic IP address. Run the dhclient -r command to clear the possible dynamic IP addresses.
     - If a DHCP server is available, set a dynamic IP address through the dhclient.
 
         ```shell