diff --git a/config-models/aether-4.x/files/yang/onf-aether-types.yang b/config-models/aether-4.x/files/yang/onf-aether-types.yang
index bbf3a5e..3672203 100755
--- a/config-models/aether-4.x/files/yang/onf-aether-types.yang
+++ b/config-models/aether-4.x/files/yang/onf-aether-types.yang
@@ -22,6 +22,12 @@
       }
   }
 
+  typedef burst {
+      type uint32 {
+      }
+      default 625000;
+  }
+
   typedef mcc {
       type string {
         pattern '[0-9]{3}';
diff --git a/config-models/aether-4.x/files/yang/onf-template.yang b/config-models/aether-4.x/files/yang/onf-template.yang
index 4be976f..334dc11 100755
--- a/config-models/aether-4.x/files/yang/onf-template.yang
+++ b/config-models/aether-4.x/files/yang/onf-template.yang
@@ -72,6 +72,18 @@
             units bps;
             description "Per-Slice MBR downlink data rate in bps";
           }
+
+          leaf uplink-burst-size {
+            type at:burst;
+            units bytes;
+            description "Per-Slice Uplink burst size";
+          }
+
+          leaf downlink-burst-size {
+            type at:burst;
+            units bytes;
+            description "Per-Slice Downlink burst size";
+          }
         }
       }
 
diff --git a/config-models/aether-4.x/files/yang/onf-vcs.yang b/config-models/aether-4.x/files/yang/onf-vcs.yang
index 9573a00..a0dbbff 100755
--- a/config-models/aether-4.x/files/yang/onf-vcs.yang
+++ b/config-models/aether-4.x/files/yang/onf-vcs.yang
@@ -166,6 +166,18 @@
             units bps;
             description "Per-Slice MBR downlink data rate in bps";
           }
+
+          leaf uplink-burst-size {
+            type at:burst;
+            units bytes;
+            description "Per-Slice Uplink burst size";
+          }
+
+          leaf downlink-burst-size {
+            type at:burst;
+            units bytes;
+            description "Per-Slice Downlink burst size";
+          }
         }
       }