2 files changed, 16 insertions, 12 deletions
diff --git a/interface-definitions/include/interface/dhcpv6-options.xml.i b/interface-definitions/include/interface/dhcpv6-options.xml.i
index 5ca1d525f..cafa03be0 100644
--- a/interface-definitions/include/interface/dhcpv6-options.xml.i
+++ b/interface-definitions/include/interface/dhcpv6-options.xml.i
@@ -4,18 +4,7 @@
     <help>DHCPv6 client settings/options</help>
   </properties>
   <children>
-    <leafNode name="duid">
-      <properties>
-        <help>DHCP unique identifier (DUID) to be sent by dhcpv6 client</help>
-        <valueHelp>
-          <format>duid</format>
-          <description>DHCP unique identifier (DUID)</description>
-        </valueHelp>
-        <constraint>
-          <validator name="ipv6-duid"/>
-        </constraint>
-      </properties>
-    </leafNode>
+    #include <include/duid.xml.i>
     <leafNode name="parameters-only">
       <properties>
         <help>Acquire only config parameters, no address</help>
diff --git a/interface-definitions/include/interface/duid.xml.i b/interface-definitions/include/interface/duid.xml.i
new file mode 100644
index 000000000..4f8988dfa
--- /dev/null
+++ b/interface-definitions/include/interface/duid.xml.i
@@ -0,0 +1,15 @@
+<!-- include start from interface/duid.xml.i -->
+<leafNode name="duid">
+  <properties>
+    <help>DHCP unique identifier (DUID) to be sent by client</help>
+    <valueHelp>
+      <format>duid</format>
+      <description>DHCP unique identifier</description>
+    </valueHelp>
+    <constraint>
+      <regex>([0-9A-Fa-f]{2}:){,127}([0-9A-Fa-f]{2})</regex>
+    </constraint>
+    <constraintErrorMessage>Invalid DUID, must be in the format h[[:h]...]</constraintErrorMessage>
+  </properties>
+</leafNode>
+<!-- include end -->