diff --git a/pages/02.linux/15.dhcp-server-and-routing/default.en.md b/pages/02.linux/15.dhcp-server-and-routing/default.en.md
index f8ef699..4cdd6b3 100644
--- a/pages/02.linux/15.dhcp-server-and-routing/default.en.md
+++ b/pages/02.linux/15.dhcp-server-and-routing/default.en.md
@@ -2,6 +2,7 @@
 title: 'DHCP Server and Routing'
 ---
 
+[toc]
 ## Installation
 `# apt install isc-dhcp-server`