diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..4945f78
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "external/verilog-ethernet"]
+	path = external/verilog-ethernet
+	url = https://github.com/alexforencich/verilog-ethernet.git
diff --git a/external/verilog-ethernet b/external/verilog-ethernet
new file mode 160000
index 0000000..77320a9
--- /dev/null
+++ b/external/verilog-ethernet
@@ -0,0 +1 @@
+Subproject commit 77320a9471d19c7dd383914bc049e02d9f4f1ffb