diff --git a/tunnel/default.go b/tunnel/default.go
index 860b6a96..2d012dff 100644
--- a/tunnel/default.go
+++ b/tunnel/default.go
@@ -856,6 +856,8 @@ func (t *tun) Dial(channel string, opts ...DialOption) (Session, error) {
 	t.RUnlock()
 
 	// discovered so set the link
+	// TODO: pick the link efficiently based 
+	// on link status and saturation.
 	if c.discovered {
 		// set the link
 		i := rand.Intn(len(links))