diff --git a/docs/en_US/guide/lxd_custom.md b/docs/en_US/guide/lxd_custom.md
index 61bec32916..55a428e7f5 100644
--- a/docs/en_US/guide/lxd_custom.md
+++ b/docs/en_US/guide/lxd_custom.md
@@ -24,7 +24,7 @@ Here are the platforms that are currently running in 2023 that offer IPV6 subnet
 
 The free platform only solves the problem that IPV6 is not available, it does not provide premium IPV6 bandwidth.
 
-If you need premium bandwidth, please build your own tunnel.
+If you need high quality bandwidth, please build your own tunnel. When both ifupdown and ifupdown2 are available, try ifupdown first to see if it can be installed successfully, otherwise install ifupdown2.
 
 ## Initial environment modifications
 
diff --git a/docs/guide/lxd_custom.md b/docs/guide/lxd_custom.md
index a3c8000cba..ee889c6b9c 100644
--- a/docs/guide/lxd_custom.md
+++ b/docs/guide/lxd_custom.md
@@ -24,7 +24,7 @@ outline: deep
 
 免费的平台只解决IPV6有没有的问题，不提供优质的IPV6带宽。
 
-如需优质的带宽，请自建隧道。
+如需优质的带宽，请自建隧道，当ifupdown和ifupdown2都可时，先尝试ifupdown是否可安装成功，否则就安装ifupdown2.
 
 ## 初始环境修改