diff --git a/p4app/controller.py b/p4app/controller.py
index 0c2b7fc..e20a4d0 100644
--- a/p4app/controller.py
+++ b/p4app/controller.py
@@ -28,7 +28,7 @@ class L2Controller(object):
         self.modes = ['base']
 
         # Network / egress
-        self.v6_mask = "/64"
+        self.v6_mask = "64"
 
         self.v6_routes = {}
         self.v6_routes[None] = []
@@ -36,7 +36,7 @@ class L2Controller(object):
         self.v6_routes['base'].append({ "net": "2001:db8:61::", "port": "1"})
         self.v6_routes['base'].append({ "net": "2001:db8:62::", "port": "2"})
 
-        self.v4_mask = "/24"
+        self.v4_mask = "24"
         self.v4_routes = {}
         self.v4_routes[None] = []
         self.v4_routes['base'] = []