From 915c6d4a60cb7402835caf83888406b4155b7d5a Mon Sep 17 00:00:00 2001
From: Brandon Heller <brandonh@stanford.edu>
Date: Thu, 15 Nov 2012 00:45:39 -0800
Subject: [PATCH] node: Use space, rather than comma, to separate controllers
 for OVS

Otherwise, OVS thinks the second controller is a parameter of the first, and
only creates one controller entry as seen in 'ovs-vsctl show'.
---
 mininet/node.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mininet/node.py b/mininet/node.py
index 2c3b0c8..7e0de3f 100644
--- a/mininet/node.py
+++ b/mininet/node.py
@@ -962,7 +962,7 @@ class OVSSwitch( Switch ):
             if not intf.IP():
                 self.attach( intf )
         # Add controllers
-        clist = ','.join( [ 'tcp:%s:%d' % ( c.IP(), c.port )
+        clist = ' '.join( [ 'tcp:%s:%d' % ( c.IP(), c.port )
                             for c in controllers ] )
         self.cmd( 'ovs-vsctl set-controller', self, clist )