diff --git a/Design.md b/Design.md
new file mode 100644
index 0000000..d4a7fda
--- /dev/null
+++ b/Design.md
@@ -0,0 +1,2 @@
+-  VSC8662 MAC interface dual port signals (Port 0 and Port1) RX/TX is connected on MSS SGMII
+Bank 5 (ref: (user manual)[https://ww1.microchip.com/downloads/aemDocuments/documents/FPGA/ProductDocuments/UserGuides/microchip_polarfire_soc_fpga_icicle_kit_user_guide_vb.pdf])