diff --git a/mininet/net.py b/mininet/net.py
index 3685c247d79241447f91ebf20a783e64c88f2ca6..d07acfb7dbbeb57f92ef6b02b18c861c2ca60cb6 100755
--- a/mininet/net.py
+++ b/mininet/net.py
@@ -437,7 +437,7 @@ def _parseIperf(iperfOutput):
             raise Exception('could not parse iperf output')
 
     def iperf(self, hosts = None, l4_type = 'TCP', udp_bw = '10M',
-              verbose = True):
+              verbose = False):
         '''Run iperf between two hosts.
 
         @param hosts list of host DPIDs; if None, uses opposite hosts