diff -Nur a/system-linux.c netifd-2015-12-16/system-linux.c
--- a/system-linux.c	2019-03-21 17:40:26.293950378 -0700
+++ netifd-2015-12-16/system-linux.c	2019-03-21 17:40:43.161949878 -0700
@@ -483,9 +483,6 @@
 	if (dev->type != &simple_device_type)
 		return;
 
-	if (add && system_if_force_external(dev->ifname))
-		return;
-
 	device_set_present(dev, add);
 }