diff --git a/release/models/ethernet-segments/openconfig-ethernet-segments.yang b/release/models/ethernet-segments/openconfig-ethernet-segments.yang
index e0b395c65..0d490661f 100644
--- a/release/models/ethernet-segments/openconfig-ethernet-segments.yang
+++ b/release/models/ethernet-segments/openconfig-ethernet-segments.yang
@@ -210,7 +210,9 @@ grouping evpn-ethernet-segment-df-config {
       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";
+        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";
     }