diff --git a/gns3server/configs/iou_l2_base_startup-config.txt b/gns3server/configs/iou_l2_base_startup-config.txt
index 0ce9f3653..f5d6344e8 100644
--- a/gns3server/configs/iou_l2_base_startup-config.txt
+++ b/gns3server/configs/iou_l2_base_startup-config.txt
@@ -13,8 +13,7 @@ logging console discriminator EXCESS
 !
 no ip icmp rate-limit unreachable
 !
-! due to some bugs with IOU, try to change the following line to 'ip cef' if your routing does not work
-no ip cef
+ip cef
 no ip domain lookup
 !
 !
diff --git a/gns3server/configs/iou_l3_base_startup-config.txt b/gns3server/configs/iou_l3_base_startup-config.txt
index 2706875d7..8a25be616 100644
--- a/gns3server/configs/iou_l3_base_startup-config.txt
+++ b/gns3server/configs/iou_l3_base_startup-config.txt
@@ -12,8 +12,7 @@ no ip icmp rate-limit unreachable
 !         
 !
 !
-! due to some bugs with IOU, try to change the following line to 'ip cef' if your routing does not work
-no ip cef
+ip cef
 no ip domain lookup
 !
 !