diff --git a/etc/tempest.conf.sample b/etc/tempest.conf.sample
index 70c791b..4a567e7 100644
--- a/etc/tempest.conf.sample
+++ b/etc/tempest.conf.sample
@@ -250,6 +250,19 @@
 # Should the tests ssh to instances? (boolean value)
 #run_ssh=false
 
+# Auth method used for authenticate to the instance. Valid
+# choices are: keypair, configured, adminpass. keypair: start
+# the servers with an ssh keypair. configured: use the
+# configured user and password. adminpass: use the injected
+# adminPass. disabled: avoid using ssh when it is an option.
+# (string value)
+#ssh_auth_method=keypair
+
+# How to connect to the instance? fixed: using the first ip
+# belongs the fixed network floating: creating and using a
+# floating ip (string value)
+#ssh_connect_method=fixed
+
 # User name used to authenticate to an instance. (string
 # value)
 #ssh_user=root
diff --git a/tempest/api/compute/base.py b/tempest/api/compute/base.py
index d1bda83..7a3798c 100644
--- a/tempest/api/compute/base.py
+++ b/tempest/api/compute/base.py
@@ -203,6 +203,13 @@
             LOG.warn("Unable to delete volume '%s' since it was not found. "
                      "Maybe it was already deleted?" % volume_id)
 
+    @classmethod
+    def prepare_instance_network(cls):
+        if (CONF.compute.ssh_auth_method != 'disabled' and
+                CONF.compute.ssh_connect_method == 'floating'):
+            cls.set_network_resources(network=True, subnet=True, router=True,
+                                      dhcp=True)
+
 
 class BaseV2ComputeTest(BaseComputeTest):
 
diff --git a/tempest/api/compute/servers/test_create_server.py b/tempest/api/compute/servers/test_create_server.py
index f0a8c8d..9d6a1c1 100644
--- a/tempest/api/compute/servers/test_create_server.py
+++ b/tempest/api/compute/servers/test_create_server.py
@@ -32,6 +32,7 @@
 
     @classmethod
     def setUpClass(cls):
+        cls.prepare_instance_network()
         super(ServersTestJSON, cls).setUpClass()
         cls.meta = {'hello': 'world'}
         cls.accessIPv4 = '1.1.1.1'
@@ -114,6 +115,7 @@
 
     @classmethod
     def setUpClass(cls):
+        cls.prepare_instance_network()
         super(ServersWithSpecificFlavorTestJSON, cls).setUpClass()
         cls.meta = {'hello': 'world'}
         cls.accessIPv4 = '1.1.1.1'
diff --git a/tempest/api/compute/servers/test_server_actions.py b/tempest/api/compute/servers/test_server_actions.py
index cc2d1ee..1f2bca9 100644
--- a/tempest/api/compute/servers/test_server_actions.py
+++ b/tempest/api/compute/servers/test_server_actions.py
@@ -44,6 +44,7 @@
 
     @classmethod
     def setUpClass(cls):
+        cls.prepare_instance_network()
         super(ServerActionsTestJSON, cls).setUpClass()
         cls.client = cls.servers_client
         cls.server_id = cls.rebuild_server(None)
diff --git a/tempest/api/compute/v3/servers/test_attach_volume.py b/tempest/api/compute/v3/servers/test_attach_volume.py
index 28d8517..e994c7f 100644
--- a/tempest/api/compute/v3/servers/test_attach_volume.py
+++ b/tempest/api/compute/v3/servers/test_attach_volume.py
@@ -33,6 +33,7 @@
 
     @classmethod
     def setUpClass(cls):
+        cls.prepare_instance_network()
         super(AttachVolumeV3Test, cls).setUpClass()
         cls.device = CONF.compute.volume_device_name
         if not CONF.service_available.cinder:
diff --git a/tempest/api/compute/v3/servers/test_create_server.py b/tempest/api/compute/v3/servers/test_create_server.py
index 80c40a2..68b4b9d 100644
--- a/tempest/api/compute/v3/servers/test_create_server.py
+++ b/tempest/api/compute/v3/servers/test_create_server.py
@@ -32,6 +32,7 @@
 
     @classmethod
     def setUpClass(cls):
+        cls.prepare_instance_network()
         super(ServersV3Test, cls).setUpClass()
         cls.meta = {'hello': 'world'}
         cls.accessIPv4 = '1.1.1.1'
@@ -115,6 +116,7 @@
 
     @classmethod
     def setUpClass(cls):
+        cls.prepare_instance_network()
         super(ServersWithSpecificFlavorV3Test, cls).setUpClass()
         cls.meta = {'hello': 'world'}
         cls.accessIPv4 = '1.1.1.1'
diff --git a/tempest/api/compute/v3/servers/test_server_actions.py b/tempest/api/compute/v3/servers/test_server_actions.py
index c377c30..b6764a5 100644
--- a/tempest/api/compute/v3/servers/test_server_actions.py
+++ b/tempest/api/compute/v3/servers/test_server_actions.py
@@ -41,6 +41,7 @@
 
     @classmethod
     def setUpClass(cls):
+        cls.prepare_instance_network()
         super(ServerActionsV3Test, cls).setUpClass()
         cls.client = cls.servers_client
         cls.server_id = cls.rebuild_server(None)
diff --git a/tempest/api/compute/volumes/test_attach_volume.py b/tempest/api/compute/volumes/test_attach_volume.py
index ab9d144..4585912 100644
--- a/tempest/api/compute/volumes/test_attach_volume.py
+++ b/tempest/api/compute/volumes/test_attach_volume.py
@@ -33,6 +33,7 @@
 
     @classmethod
     def setUpClass(cls):
+        cls.prepare_instance_network()
         super(AttachVolumeTestJSON, cls).setUpClass()
         cls.device = CONF.compute.volume_device_name
         if not CONF.service_available.cinder:
diff --git a/tempest/config.py b/tempest/config.py
index b9fe572..7084768 100644
--- a/tempest/config.py
+++ b/tempest/config.py
@@ -159,6 +159,19 @@
     cfg.BoolOpt('run_ssh',
                 default=False,
                 help="Should the tests ssh to instances?"),
+    cfg.StrOpt('ssh_auth_method',
+               default='keypair',
+               help="Auth method used for authenticate to the instance. "
+                    "Valid choices are: keypair, configured, adminpass. "
+                    "keypair: start the servers with an ssh keypair. "
+                    "configured: use the configured user and password. "
+                    "adminpass: use the injected adminPass. "
+                    "disabled: avoid using ssh when it is an option."),
+    cfg.StrOpt('ssh_connect_method',
+               default='fixed',
+               help="How to connect to the instance? "
+                    "fixed: using the first ip belongs the fixed network "
+                    "floating: creating and using a floating ip"),
     cfg.StrOpt('ssh_user',
                default='root',
                help="User name used to authenticate to an instance."),