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+# DHCP
+
+## Installation dhcp 
+
+    apt-get instal isc-dhcp-server
+    
+---------
+
+### Configuration dhcpd.conf
+
+#### atteindre fichier de configuration : 
+
+    cd /etc/dhcp
+    nano dhcpd.conf
+
+#### dhcpd.conf : 
+
+# dhcpd.conf
+
+    option domain-name "networkandco.org";
+
+    default-lease-time 600;
+    max-lease-time 7200;
+    allow booting;
+    allow bootp;
+
+
+    ddns-update-style none;
+
+
+    server-identifier 192.168.40.150;
+    authoritative;
+    ddns-update-style interim;
+
+
+#VLAN 2 
+
+    subnet 192.168.40.0 netmask 255.255.255.0 {
+        range  dynamic-bootp 192.168.40.20 192.168.40.100;
+        option routers 192.168.40.254;
+        option subnet-mask 255.255.255.0;
+        option domain-name "networkandco.org";
+        option domain-name-servers 192.168.40.151;
+    }
+
+#VLAN 3 
+
+    subnet 192.168.50.0 netmask 255.255.255.0 {
+        range  dynamic-bootp 192.168.50.20 192.168.50.100;
+        option routers 192.168.50.254;
+        option subnet-mask 255.255.255.0;
+        option domain-name "networkandco.org";
+    }
+
+#VLAN 4 
+
+    subnet 192.168.60.0 netmask 255.255.255.0 {
+        range  dynamic-bootp 192.168.60.20 192.168.60.100;
+        option routers 192.168.60.254;
+        option subnet-mask 255.255.255.0;
+        option domain-name "networkandco.org";
+        option domain-name-servers 192.168.40.151;
+    }
+
+--------
+
+    key "dhcp-update-key" {
+        algorithm hmac-md5;
+        secret "7R1U767pLKhR+O/0hF11TfeNmoVpVU+lfLnL3GhvWpI=";
+    }
+
+    zone networkandco.org {
+        primary 192.168.40.151;
+        key "dhcp-update-key";
+    }
+
+    zone 40.168.192.in-addr-arpa {
+        primary 192.168.40.151;
+        key "rndc-key";
+    }
+
+### TIPS !
+
+    Ne pas oublier chmod sur les fichiers config dhcp/dns
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