Updates to the ES model to allow the configuration of an ES-import ro…

…ute target (#1109)

* Add a new leaf "es-import-route-target" to the Ethernet Segment config
  model to allow the explicit configuration of an ES-import route target
  as per RFC7432 Section 7.6

release/models/ethernet-segments/openconfig-ethernet-segments.yang

@@ -8,6 +8,7 @@ module openconfig-ethernet-segments {
 
   import openconfig-extensions { prefix oc-ext; }
   import openconfig-interfaces { prefix oc-if; }
+  import openconfig-yang-types { prefix oc-yang-types; }
   import openconfig-evpn-types { prefix oc-evpn-types; }
 
   // meta
@@ -23,7 +24,13 @@ module openconfig-ethernet-segments {
      The ethernet segments are used in EVPN services are
      defined for the whole device";
 
-  oc-ext:openconfig-version "0.1.0";
+  oc-ext:openconfig-version "0.2.0";
+
+  revision "2024-09-06" {
+    description
+      "Added ability to configure an explicit es-import-route-target for an ES";
+    reference "0.2.0";
+  }
 
   revision "2021-06-28" {
    description
@@ -199,6 +206,17 @@ grouping evpn-ethernet-segment-df-config {
         "RFC 7432: BGP MPLS-Based Ethernet VPN";
     }
 
+    leaf es-import-route-target {
+      type oc-yang-types:mac-address;
+      description
+        "Received ES routes with an ES-Import extended community set to this value
+        are imported into this ethernet segment.  When configured by a user, the
+        es-import-route-target will be used, otherwise the system automatically
+        derives the value used by following the procedures in RFC 7432 Section 7.6.";
+      reference
+        "RFC 7432: BGP MPLS-Based Ethernet VPN Section 7.6";
+    }
+
     uses oc-if:interface-ref-common;
   }
 
@@ -247,4 +265,4 @@ grouping evpn-ethernet-segment-df-config {
 
   uses evpn-ethernet-segment-top;
 
-}
+}