diff --git a/tools/regression/netipx/README b/tools/regression/netipx/README
new file mode 100644
index 000000000000..a1a07a4e7855
--- /dev/null
+++ b/tools/regression/netipx/README
@@ -0,0 +1,11 @@
+These regression tests assume that the kernel is compiled with support for
+netipx:
+
+	options IPX
+
+In addition, the loopback interface should be configured with the address
+0xbebe.1:
+
+	ifconfig lo0 ipx 0xbebe.1
+
+$FreeBSD$