diff --git a/roles/kea/templates/kea/kea-dhcp4.conf.j2 b/roles/kea/templates/kea/kea-dhcp4.conf.j2
index 0a0d71d..8f2da66 100644
--- a/roles/kea/templates/kea/kea-dhcp4.conf.j2
+++ b/roles/kea/templates/kea/kea-dhcp4.conf.j2
@@ -61,6 +61,46 @@
     "rebind-timer": 1800,
     "valid-lifetime": 3600,
 
+    "option-def": [
+        {
+            "code": 43,
+            "encapsulate": "sipdect",
+            "name": "vendor-encapsulated-options",
+            "space": "dhcp4",
+            "type": "empty"
+        },
+        {
+            "code": 10,
+            "name": "ommip1",
+            "space": "sipdect",
+            "type": "ipv4-address"
+        },
+        {
+            "code": 19,
+            "name": "ommip2",
+            "space": "sipdect",
+            "type": "ipv4-address"
+        },
+        {
+            "code": 14,
+            "name": "syslogip",
+            "space": "sipdect",
+            "type": "ipv4-address"
+        },
+        {
+            "code": 15,
+            "name": "syslogport",
+            "space": "sipdect",
+            "type": "int16"
+        },
+        {
+            "code": 224,
+            "name": "magic_str",
+            "space": "dhcp4",
+            "type": "string"
+        }
+    ],
+
     "option-data": [
         {
             "name": "domain-name-servers",
@@ -78,6 +118,36 @@
         }
     ],
 
+    "client-classes": [
+        {
+            "name": "voip-phone",
+            "option-data": [
+                {
+                    "name": "tftp-server-name",
+                    "data": "172.23.2.36"
+                }
+            ]
+        },
+
+        {
+            "name": "dect-rfp",
+            "option-data": [
+                {
+                    "name": "vendor-encapsulated-options"
+                },
+                {
+                    "data": "172.23.2.35",
+                    "name": "ommip1",
+                    "space": "sipdect"
+                },
+                {
+                    "data": "OpenMobilitySIP-DECT",
+                    "name": "magic_str"
+                }
+            ]
+        }
+    ],
+
     "subnet4": [
         {
             "subnet": "172.23.1.0/24",