diff --git a/neutron_tempest_plugin/common/__init__.py b/neutron_tempest_plugin/common/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/neutron_tempest_plugin/common/__init__.py
diff --git a/neutron_tempest_plugin/common/constants.py b/neutron_tempest_plugin/common/constants.py
new file mode 100644
index 0000000..4ad780d
--- /dev/null
+++ b/neutron_tempest_plugin/common/constants.py
@@ -0,0 +1,177 @@
+# Copyright (c) 2012 OpenStack Foundation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from neutron_lib import constants as lib_constants
+
+
+ROUTER_PORT_OWNERS = lib_constants.ROUTER_INTERFACE_OWNERS_SNAT + \
+    (lib_constants.DEVICE_OWNER_ROUTER_GW,)
+
+ROUTER_STATUS_ACTIVE = 'ACTIVE'
+ROUTER_STATUS_ERROR = 'ERROR'
+
+DEVICE_ID_RESERVED_DHCP_PORT = "reserved_dhcp_port"
+
+HA_ROUTER_STATE_KEY = '_ha_state'
+METERING_LABEL_KEY = '_metering_labels'
+FLOATINGIP_AGENT_INTF_KEY = '_floatingip_agent_interfaces'
+SNAT_ROUTER_INTF_KEY = '_snat_router_interfaces'
+DVR_SNAT_BOUND = 'dvr_snat_bound'
+L3_AGENT_MODE_DVR_NO_EXTERNAL = 'dvr_no_external'
+
+HA_NETWORK_NAME = 'HA network tenant %s'
+HA_SUBNET_NAME = 'HA subnet tenant %s'
+HA_PORT_NAME = 'HA port tenant %s'
+HA_ROUTER_STATE_ACTIVE = 'active'
+HA_ROUTER_STATE_STANDBY = 'standby'
+
+PAGINATION_INFINITE = 'infinite'
+
+SORT_DIRECTION_ASC = 'asc'
+SORT_DIRECTION_DESC = 'desc'
+
+ETHERTYPE_NAME_ARP = 'arp'
+ETHERTYPE_ARP = 0x0806
+ETHERTYPE_IP = 0x0800
+ETHERTYPE_IPV6 = 0x86DD
+
+IP_PROTOCOL_NAME_ALIASES = {lib_constants.PROTO_NAME_IPV6_ICMP_LEGACY:
+                            lib_constants.PROTO_NAME_IPV6_ICMP}
+
+VALID_DSCP_MARKS = [0, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34,
+                    36, 38, 40, 46, 48, 56]
+
+IP_PROTOCOL_NUM_TO_NAME_MAP = {
+    str(v): k for k, v in lib_constants.IP_PROTOCOL_MAP.items()}
+
+# When using iptables-save we specify '-p {proto} -m {module}',
+# but sometimes those values are not identical.  This is a map
+# of known protocols that require a '-m {module}', along with
+# the module name that should be used.
+IPTABLES_PROTOCOL_MAP = {lib_constants.PROTO_NAME_DCCP: 'dccp',
+                         lib_constants.PROTO_NAME_ICMP: 'icmp',
+                         lib_constants.PROTO_NAME_IPV6_ICMP: 'icmp6',
+                         lib_constants.PROTO_NAME_SCTP: 'sctp',
+                         lib_constants.PROTO_NAME_TCP: 'tcp',
+                         lib_constants.PROTO_NAME_UDP: 'udp'}
+
+# Special provisional prefix for IPv6 Prefix Delegation
+PROVISIONAL_IPV6_PD_PREFIX = '::/64'
+
+# Timeout in seconds for getting an IPv6 LLA
+LLA_TASK_TIMEOUT = 40
+
+# length of all device prefixes (e.g. qvo, tap, qvb)
+LINUX_DEV_PREFIX_LEN = 3
+# must be shorter than linux IFNAMSIZ (which is 16)
+LINUX_DEV_LEN = 14
+
+# Possible prefixes to partial port IDs in interface names used by the OVS,
+# Linux Bridge, and IVS VIF drivers in Nova and the neutron agents. See the
+# 'get_ovs_interfaceid' method in Nova (nova/virt/libvirt/vif.py) for details.
+INTERFACE_PREFIXES = (lib_constants.TAP_DEVICE_PREFIX,
+                      lib_constants.VETH_DEVICE_PREFIX,
+                      lib_constants.SNAT_INT_DEV_PREFIX)
+
+ATTRIBUTES_TO_UPDATE = 'attributes_to_update'
+
+# Maximum value integer can take in MySQL and PostgreSQL
+# In SQLite integer can be stored in 1, 2, 3, 4, 6, or 8 bytes,
+# but here it will be limited by this value for consistency.
+DB_INTEGER_MAX_VALUE = 2 ** 31 - 1
+
+# TODO(amuller): Re-define the RPC namespaces once Oslo messaging supports
+# Targets with multiple namespaces. Neutron will then implement callbacks
+# for its RPC clients in order to support rolling upgrades.
+
+# RPC Interface for agents to call DHCP API implemented on the plugin side
+RPC_NAMESPACE_DHCP_PLUGIN = None
+# RPC interface for the metadata service to get info from the plugin side
+RPC_NAMESPACE_METADATA = None
+# RPC interface for agent to plugin security group API
+RPC_NAMESPACE_SECGROUP = None
+# RPC interface for agent to plugin DVR api
+RPC_NAMESPACE_DVR = None
+# RPC interface for reporting state back to the plugin
+RPC_NAMESPACE_STATE = None
+# RPC interface for agent to plugin resources API
+RPC_NAMESPACE_RESOURCES = None
+
+# Default network MTU value when not configured
+DEFAULT_NETWORK_MTU = 1500
+IPV6_MIN_MTU = 1280
+
+ROUTER_MARK_MASK = "0xffff"
+
+# Agent states as detected by server, used to reply on agent's state report
+# agent has just been registered
+AGENT_NEW = 'new'
+# agent is alive
+AGENT_ALIVE = 'alive'
+# agent has just returned to alive after being dead
+AGENT_REVIVED = 'revived'
+
+INGRESS_DIRECTION = 'ingress'
+EGRESS_DIRECTION = 'egress'
+
+VALID_DIRECTIONS = (INGRESS_DIRECTION, EGRESS_DIRECTION)
+VALID_ETHERTYPES = (lib_constants.IPv4, lib_constants.IPv6)
+
+IP_ALLOWED_VERSIONS = [lib_constants.IP_VERSION_4, lib_constants.IP_VERSION_6]
+
+PORT_RANGE_MIN = 1
+PORT_RANGE_MAX = 65535
+
+# Configuration values for accept_ra sysctl, copied from linux kernel
+# networking (netdev) tree, file Documentation/networking/ip-sysctl.txt
+#
+# Possible values are:
+#         0 Do not accept Router Advertisements.
+#         1 Accept Router Advertisements if forwarding is disabled.
+#         2 Overrule forwarding behaviour. Accept Router Advertisements
+#           even if forwarding is enabled.
+ACCEPT_RA_DISABLED = 0
+ACCEPT_RA_WITHOUT_FORWARDING = 1
+ACCEPT_RA_WITH_FORWARDING = 2
+
+# Some components communicate using private address ranges, define
+# them all here. These address ranges should not cause any issues
+# even if they overlap since they are used in disjoint namespaces,
+# but for now they are unique.
+# We define the metadata cidr since it falls in the range.
+PRIVATE_CIDR_RANGE = '169.254.0.0/16'
+DVR_FIP_LL_CIDR = '169.254.64.0/18'
+L3_HA_NET_CIDR = '169.254.192.0/18'
+METADATA_CIDR = '169.254.169.254/32'
+
+# The only defined IpamAllocation status at this stage is 'ALLOCATED'.
+# More states will be available in the future - e.g.: RECYCLABLE
+IPAM_ALLOCATION_STATUS_ALLOCATED = 'ALLOCATED'
+
+VALID_IPAM_ALLOCATION_STATUSES = (IPAM_ALLOCATION_STATUS_ALLOCATED,)
+
+# Port binding states for Live Migration
+PORT_BINDING_STATUS_ACTIVE = 'ACTIVE'
+PORT_BINDING_STATUS_INACTIVE = 'INACTIVE'
+PORT_BINDING_STATUSES = (PORT_BINDING_STATUS_ACTIVE,
+                         PORT_BINDING_STATUS_INACTIVE)
+
+VALID_FLOATINGIP_STATUS = (lib_constants.FLOATINGIP_STATUS_ACTIVE,
+                           lib_constants.FLOATINGIP_STATUS_DOWN,
+                           lib_constants.FLOATINGIP_STATUS_ERROR)
+
+# Possible types of values (e.g. in QoS rule types)
+VALUES_TYPE_CHOICES = "choices"
+VALUES_TYPE_RANGE = "range"
diff --git a/neutron_tempest_plugin/common/qos_consts.py b/neutron_tempest_plugin/common/qos_consts.py
new file mode 100644
index 0000000..e4a14cf
--- /dev/null
+++ b/neutron_tempest_plugin/common/qos_consts.py
@@ -0,0 +1,56 @@
+# Copyright (c) 2015 Red Hat Inc.
+# All rights reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+RULE_TYPE_BANDWIDTH_LIMIT = 'bandwidth_limit'
+RULE_TYPE_DSCP_MARKING = 'dscp_marking'
+RULE_TYPE_MINIMUM_BANDWIDTH = 'minimum_bandwidth'
+VALID_RULE_TYPES = [RULE_TYPE_BANDWIDTH_LIMIT,
+                    RULE_TYPE_DSCP_MARKING,
+                    RULE_TYPE_MINIMUM_BANDWIDTH,
+                    ]
+
+# Names of rules' attributes
+MAX_KBPS = "max_kbps"
+MAX_BURST = "max_burst_kbps"
+MIN_KBPS = "min_kbps"
+DIRECTION = "direction"
+DSCP_MARK = "dscp_mark"
+
+QOS_POLICY_ID = 'qos_policy_id'
+
+QOS_PLUGIN = 'qos_plugin'
+
+# NOTE(slaweq): Value used to calculate burst value for egress bandwidth limit
+# if burst is not given by user. In such case burst value will be calculated
+# as 80% of bw_limit to ensure that at least limits for TCP traffic will work
+# fine.
+DEFAULT_BURST_RATE = 0.8
+
+# Method names for QoSDriver
+PRECOMMIT_POSTFIX = '_precommit'
+CREATE_POLICY = 'create_policy'
+CREATE_POLICY_PRECOMMIT = CREATE_POLICY + PRECOMMIT_POSTFIX
+UPDATE_POLICY = 'update_policy'
+UPDATE_POLICY_PRECOMMIT = UPDATE_POLICY + PRECOMMIT_POSTFIX
+DELETE_POLICY = 'delete_policy'
+DELETE_POLICY_PRECOMMIT = DELETE_POLICY + PRECOMMIT_POSTFIX
+
+QOS_CALL_METHODS = (
+    CREATE_POLICY,
+    CREATE_POLICY_PRECOMMIT,
+    UPDATE_POLICY,
+    UPDATE_POLICY_PRECOMMIT,
+    DELETE_POLICY,
+    DELETE_POLICY_PRECOMMIT, )
diff --git a/neutron_tempest_plugin/common/ssh.py b/neutron_tempest_plugin/common/ssh.py
new file mode 100644
index 0000000..b919b65
--- /dev/null
+++ b/neutron_tempest_plugin/common/ssh.py
@@ -0,0 +1,24 @@
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from tempest.lib.common import ssh
+
+from neutron_tempest_plugin import config
+
+
+class Client(ssh.Client):
+    def __init__(self, *args, **kwargs):
+        if 'timeout' not in kwargs:
+            kwargs['timeout'] = config.CONF.validation.ssh_timeout
+        super(Client, self).__init__(*args, **kwargs)
diff --git a/neutron_tempest_plugin/common/tempest_fixtures.py b/neutron_tempest_plugin/common/tempest_fixtures.py
new file mode 100644
index 0000000..d416857
--- /dev/null
+++ b/neutron_tempest_plugin/common/tempest_fixtures.py
@@ -0,0 +1,21 @@
+# Copyright 2013 IBM Corp.
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from oslo_concurrency.fixture import lockutils
+
+
+class LockFixture(lockutils.LockFixture):
+    def __init__(self, name):
+        super(LockFixture, self).__init__(name, 'tempest-')
diff --git a/neutron_tempest_plugin/common/utils.py b/neutron_tempest_plugin/common/utils.py
new file mode 100644
index 0000000..ecccd18
--- /dev/null
+++ b/neutron_tempest_plugin/common/utils.py
@@ -0,0 +1,72 @@
+# Copyright 2011, VMware, Inc.
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+#
+# Borrowed from nova code base, more utilities will be added/borrowed as and
+# when needed.
+
+"""Utilities and helper functions."""
+
+import eventlet
+import threading
+import time
+
+
+class classproperty(object):
+    def __init__(self, f):
+        self.func = f
+
+    def __get__(self, obj, owner):
+        return self.func(owner)
+
+
+class WaitTimeout(Exception):
+    """Default exception coming from wait_until_true() function."""
+
+
+class LockWithTimer(object):
+    def __init__(self, threshold):
+        self._threshold = threshold
+        self.timestamp = 0
+        self._lock = threading.Lock()
+
+    def acquire(self):
+        return self._lock.acquire(False)
+
+    def release(self):
+        return self._lock.release()
+
+    def time_to_wait(self):
+        return self.timestamp - time.time() + self._threshold
+
+
+def wait_until_true(predicate, timeout=60, sleep=1, exception=None):
+    """
+    Wait until callable predicate is evaluated as True
+    :param predicate: Callable deciding whether waiting should continue.
+    Best practice is to instantiate predicate with functools.partial()
+    :param timeout: Timeout in seconds how long should function wait.
+    :param sleep: Polling interval for results in seconds.
+    :param exception: Exception instance to raise on timeout. If None is passed
+                      (default) then WaitTimeout exception is raised.
+    """
+    try:
+        with eventlet.Timeout(timeout):
+            while not predicate():
+                eventlet.sleep(sleep)
+    except eventlet.Timeout:
+        if exception is not None:
+            #pylint: disable=raising-bad-type
+            raise exception
+        raise WaitTimeout("Timed out after %d seconds" % timeout)