diff --git a/config-models/aether-4.x/files/aether-4.0.0.tree b/config-models/aether-4.x/files/aether-4.0.0.tree
index e47bf9f..b1414c3 100644
--- a/config-models/aether-4.x/files/aether-4.0.0.tree
+++ b/config-models/aether-4.x/files/aether-4.0.0.tree
@@ -104,8 +104,10 @@
         +--rw sd?                 at:sd
         +--rw slice
         |  +--rw mbr
-        |     +--rw uplink?     at:bitrate
-        |     +--rw downlink?   at:bitrate
+        |     +--rw uplink?                at:bitrate
+        |     +--rw downlink?              at:bitrate
+        |     +--rw uplink-burst-size?     at:burst
+        |     +--rw downlink-burst-size?   at:burst
         +--rw default-behavior    at:behavior
         +--rw description?        at:description
 
@@ -153,5 +155,7 @@
         +--rw sd                  at:sd
         +--rw slice
            +--rw mbr
-              +--rw uplink?     at:bitrate
-              +--rw downlink?   at:bitrate
+              +--rw uplink?                at:bitrate
+              +--rw downlink?              at:bitrate
+              +--rw uplink-burst-size?     at:burst
+              +--rw downlink-burst-size?   at:burst
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";
+          }
         }
       }