Stop setting promisc on bridge

 * With hairpin mode the old workaround is now broken
 * Fixes bug 956474

Change-Id: Ib06baa5292ad59138041b2c641673a96263b5ff8

nova/network/linux_net.py

@@ -562,12 +562,6 @@ def initialize_gateway_device(dev, network_ref):
         _execute('ip', '-f', 'inet6', 'addr',
                      'change', network_ref['cidr_v6'],
                      'dev', dev, run_as_root=True)
-    # NOTE(vish): If the public interface is the same as the
-    #             bridge, then the bridge has to be in promiscuous
-    #             to forward packets properly.
-    if(FLAGS.public_interface == dev):
-        _execute('ip', 'link', 'set',
-                     'dev', dev, 'promisc', 'on', run_as_root=True)
 
 
 def get_dhcp_leases(context, network_ref):

nova/tests/test_linux_net.py

@@ -504,7 +504,6 @@ def test_initialize_gateway_moves_wrong_ip(self):
              'brd', '192.168.0.255', 'scope', 'global', 'dev', 'eth0'),
             ('ip', '-f', 'inet6', 'addr', 'change',
              '2001:db8::/64', 'dev', 'eth0'),
-            ('ip', 'link', 'set', 'dev', 'eth0', 'promisc', 'on'),
         ]
         self._test_initialize_gateway(existing, expected)
 
@@ -530,7 +529,6 @@ def test_initialize_gateway_resets_route(self):
             ('route', 'add', 'default', 'gw', '192.68.0.1'),
             ('ip', '-f', 'inet6', 'addr', 'change',
              '2001:db8::/64', 'dev', 'eth0'),
-            ('ip', 'link', 'set', 'dev', 'eth0', 'promisc', 'on'),
         ]
         self._test_initialize_gateway(existing, expected, routes)
 
@@ -546,7 +544,6 @@ def test_initialize_gateway_no_move_right_ip(self):
             ('ip', 'addr', 'show', 'dev', 'eth0', 'scope', 'global'),
             ('ip', '-f', 'inet6', 'addr', 'change',
              '2001:db8::/64', 'dev', 'eth0'),
-            ('ip', 'link', 'set', 'dev', 'eth0', 'promisc', 'on'),
         ]
         self._test_initialize_gateway(existing, expected)
 
@@ -563,6 +560,5 @@ def test_initialize_gateway_add_if_blank(self):
              'brd', '192.168.1.255', 'dev', 'eth0'),
             ('ip', '-f', 'inet6', 'addr', 'change',
              '2001:db8::/64', 'dev', 'eth0'),
-            ('ip', 'link', 'set', 'dev', 'eth0', 'promisc', 'on'),
         ]
         self._test_initialize_gateway(existing, expected)