diff --git a/device-types/Extreme/BR-SLX-9540-48S-AC.yaml b/device-types/Extreme/BR-SLX-9540-48S-AC.yaml
new file mode 100644
index 000000000..fba18ce35
--- /dev/null
+++ b/device-types/Extreme/BR-SLX-9540-48S-AC.yaml
@@ -0,0 +1,129 @@
+manufacturer: Extreme
+model: BR-SLX-9540-48S
+slug: br-slx-9540-48s
+part_number: BR-SLX-9540-48S
+u_height: 1
+is_full_depth: false
+comments: ''
+console-ports:
+  - name: Console
+    type: rj-45
+power-ports:
+  - name: PS1
+    type: iec-60320-c14
+    maximum_draw: 647
+  - name: PS2
+    type: iec-60320-c14
+    maximum_draw: 647
+interfaces:
+  - name: Ethernet 0/1
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/2
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/3
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/4
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/5
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/6
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/7
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/8
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/9
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/10
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/11
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/12
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/13
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/14
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/15
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/16
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/17
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/18
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/19
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/20
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/21
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/22
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/23
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/24
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/25
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/26
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/27
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/28
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/29
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/30
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/31
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/32
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/33
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/34
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/35
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/36
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/37
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/38
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/39
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/40
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/41
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/42
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/43
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/44
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/45
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/46
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/47
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/48
+    type: 10gbase-x-sfpp
+  - name: Ethernet 0/49
+    type: 100gbase-x-qsfp28
+  - name: Ethernet 0/50
+    type: 100gbase-x-qsfp28
+  - name: Ethernet 0/51
+    type: 100gbase-x-qsfp28
+  - name: Ethernet 0/52
+    type: 100gbase-x-qsfp28
+  - name: Ethernet 0/53
+    type: 100gbase-x-qsfp28
+  - name: Ethernet 0/54
+    type: 100gbase-x-qsfp28
+  - name: Management0
+    type: 1000base-t
+    mgmt_only: true