diff --git a/device-types/Cisco/ASR-9904.yaml b/device-types/Cisco/ASR-9904.yaml
index 8bd0f7f9c..e37e434f3 100644
--- a/device-types/Cisco/ASR-9904.yaml
+++ b/device-types/Cisco/ASR-9904.yaml
@@ -20,12 +20,16 @@ power-ports:
   - name: PS3
     type: iec-60320-c22
     maximum_draw: 3000
-device-bays:
+module-bays:
   - name: Slot 0
     label: LC 0
+    position: 0/0
   - name: Slot 1
+    position: 0/RP0
     label: RSP 0
   - name: Slot 2
     label: RSP 1
+    position: 0/RP1
   - name: Slot 3
     label: LC 1
+    position: 0/1
diff --git a/device-types/Cisco/ASR-9906.yaml b/device-types/Cisco/ASR-9906.yaml
index e54b33da8..f05b9ef49 100644
--- a/device-types/Cisco/ASR-9906.yaml
+++ b/device-types/Cisco/ASR-9906.yaml
@@ -26,16 +26,22 @@ power-ports:
   - name: PS5
     type: iec-60320-c22
     maximum_draw: 6000
-device-bays:
+module-bays:
   - name: Slot 0
+    position: 0/RP0
     label: RSP 0
   - name: Slot 1
     label: Line Card 0
+    position: 0/0/0
   - name: Slot 2
     label: Line Card 1
+    position: 0/1
   - name: Slot 3
     label: Line Card 2
+    position: 0/2
   - name: Slot 4
     label: Line Card 3
+    position: 0/3
   - name: Slot 5
     label: RSP 1
+    position: 0/RP1
diff --git a/device-types/Cisco/ASR-9910.yaml b/device-types/Cisco/ASR-9910.yaml
index dbd0ea381..6d5c15bba 100644
--- a/device-types/Cisco/ASR-9910.yaml
+++ b/device-types/Cisco/ASR-9910.yaml
@@ -44,24 +44,34 @@ power-ports:
   - name: PS11
     type: iec-60320-c22
     maximum_draw: 6000
-device-bays:
+module-bays:
   - name: Slot 0
     label: RSP 0
+    position: 0/RP0
   - name: Slot 1
     label: Line Card 0
+    position: 0/0
   - name: Slot 2
     label: Line Card 1
+    position: 0/1
   - name: Slot 3
     label: Line Card 2
+    position: 0/2
   - name: Slot 4
     label: Line Card 3
+    position: 0/3
   - name: Slot 5
     label: Line Card 4
+    position: 0/4
   - name: Slot 6
     label: Line Card 5
+    position: 0/5
   - name: Slot 7
     label: Line Card 6
+    position: 0/6
   - name: Slot 8
+    position: 0/7
     label: Line Card 7
   - name: Slot 9
     label: RSP 1
+    position: 0/RP1