diff --git a/cocotb/hw_itl.py b/cocotb/hw_itl.py
index 54ef8cb..62a92eb 100644
--- a/cocotb/hw_itl.py
+++ b/cocotb/hw_itl.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import cocotb
 from cocotb.triggers import *
@@ -14,6 +14,13 @@ import os
 import asyncio
 import fcntl
 
+'''
+# Set up virtual device using
+sudo ip link add virt0 type dummy
+sudo ip link set up virt0
+sudo ip addr add 192.168.2.10/24 dev virt0
+'''
+
 class MacDevReceiver():
 	def __init__(self, dut, eth_tx, eth_rx, dev):
 		self.dut = dut
@@ -28,7 +35,7 @@ class MacDevReceiver():
 		ETH_P_ALL=3
 		self.macdev=socket.socket(socket.AF_PACKET, socket.SOCK_RAW, socket.htons(ETH_P_ALL))
 		self.macdev.bind((dev, 0))
-		fcntl.fcntl(self.macdev, fcntl.F_SETFL, os.O_NONBLOCK)
+		fcntl.fcntl(self.macdev, fcntl.F_SETFL, os.O_NONBLOCK) # Not the best way to poll, but I couldn't get asyncio to play nicely with threading...
 
 	async def main(self):
 		ETH_HEAD = b'\x55\x55\x55\x55\xD5'