diff --git a/src/test/subscriber/generate_portmap.py b/src/test/subscriber/generate_portmap.py
new file mode 100644
index 0000000..b399010
--- /dev/null
+++ b/src/test/subscriber/generate_portmap.py
@@ -0,0 +1,18 @@
+#!/usr/bin/env python
+##Generate a port map for 100 subscribers based on veth pairs
+import sys
+header = '''###This file is auto-generated. Do not EDIT###'''
+def generate_port_map(num = 100):
+    print("g_subscriber_port_map = {}")
+    print("g_subscriber_reverse_port_map = {}")
+    for i in xrange(1, num+1):
+        intf = 'veth' + str(2*i-2)
+        print("g_subscriber_port_map[%d]='%s'" %(i, intf))
+        print("g_subscriber_reverse_port_map['%s']=%d" %(intf, i))
+
+if __name__ == '__main__':
+    num = 100
+    if len(sys.argv) > 1:
+        num = int(sys.argv[1])
+    print(header)
+    generate_port_map(num)