diff --git a/ntp/schemas/client.yaml b/ntp/schemas/client.yaml
index cf43ae2..373ea81 100644
--- a/ntp/schemas/client.yaml
+++ b/ntp/schemas/client.yaml
@@ -40,6 +40,12 @@
     patternProperties:
       "^[0-9]*$":
         $ref: "#/definitions/_ntp:common:stratum"
+  interface:
+    description: |
+      Set of interface parameters.
+    type: object
+    items:
+      $ref: "#/definitions/_ntp:common:interface"
   auth:
     description: |
      Support of ntp auth.
@@ -93,3 +99,14 @@
         type: string
       trustedkey:
         type: boolean
+  _ntp:common:interface:
+    description: |
+      Define exactly one interface action and its value
+    type: object
+    additionalProperties: false
+    required: [action, value]
+    properties:
+      action:
+        type: string
+      value:
+        type: string
diff --git a/ntp/schemas/server.yaml b/ntp/schemas/server.yaml
index 0ae5b8e..416f69d 100644
--- a/ntp/schemas/server.yaml
+++ b/ntp/schemas/server.yaml
@@ -59,6 +59,12 @@
     patternProperties:
       "^[0-9]*$":
         $ref: "#/definitions/_ntp:common:stratum"
+  interface:
+    description: |
+      Set of interface parameters.
+    type: object
+    items:
+      $ref: "#/definitions/_ntp:common:interface"
   auth:
     description: |
      Support of ntp auth.
@@ -168,4 +174,14 @@
         type: string
       trustedkey:
         type: boolean
-
+  _ntp:common:interface:
+    description: |
+      Define exactly one interface action and its value
+    type: object
+    additionalProperties: false
+    required: [action, value]
+    properties:
+      action:
+        type: string
+      value:
+        type: string
diff --git a/tests/pillar/client.sls b/tests/pillar/client.sls
index fd770b7..a313c5f 100644
--- a/tests/pillar/client.sls
+++ b/tests/pillar/client.sls
@@ -5,3 +5,7 @@
     strata:
     - ntp.cesnet.cz
     - pool.ntp.org
+    interface:
+      test:
+        action: action
+        value: value
diff --git a/tests/pillar/server.sls b/tests/pillar/server.sls
index b623e0c..08713b4 100644
--- a/tests/pillar/server.sls
+++ b/tests/pillar/server.sls
@@ -17,3 +17,7 @@
     strata:
     - ntp.cesnet.cz
     - pool.ntp.org
+    interface:
+      test:
+        action: action
+        value: value
\ No newline at end of file