diff --git a/devstack/local.conf.node_1.sample b/devstack/local.conf.node_1.sample
index 76b86605..b719732f 100644
--- a/devstack/local.conf.node_1.sample
+++ b/devstack/local.conf.node_1.sample
@@ -2,16 +2,17 @@
 # Sample DevStack local.conf.
 #
 # This sample file is intended to be used for your typical Tricircle DevStack
-# multi-node environment. As this file configures, DevStack will setup two
-# regions, one top region running Tricircle services, Keystone, Glance, Nova
-# API gateway, Cinder API gateway and Neutron with Tricircle plugin; and one
-# bottom region running original Nova, Cinder and Neutron.
+# multi-node environment. This file has the configuration values for DevStack
+# to result in Central Neutron service and Tricircle Admin API service
+# registered in CentralRegion, and local Neutron service and remaining
+# services(e. g. Nova, Cinder, etc.) will be placed in RegionOne, but Keystone
+# will be registered in RegionOne and is shared by services in all the
+# regions.
 #
 # This file works with local.conf.node_2.sample to help you build a two-node
-# three-region Tricircle environment. Keystone and Glance in top region are
-# shared by services in all the regions.
+# three-region Tricircle environment(Central Region, RegionOne and RegionTwo).
 #
-# Some options needs to be change to adapt to your environment, see README.md
+# Some options need to be changed to adapt to your environment, see README.rst
 # for detail.
 #
 
@@ -22,61 +23,20 @@ RABBIT_PASSWORD=password
 SERVICE_PASSWORD=password
 SERVICE_TOKEN=password
 ADMIN_PASSWORD=password
-LOGFILE=/opt/stack/logs/stack.sh.log
-VERBOSE=True
-LOG_COLOR=True
-SCREEN_LOGDIR=/opt/stack/logs
-FIXED_RANGE=10.0.0.0/24
-NETWORK_GATEWAY=10.0.0.1
-FIXED_NETWORK_SIZE=256
-FLOATING_RANGE=10.100.100.160/24
-Q_FLOATING_ALLOCATION_POOL=start=10.100.100.160,end=10.100.100.192
-
-PUBLIC_NETWORK_GATEWAY=10.100.100.3
-
-Q_USE_SECGROUP=False
-LIBVIRT_FIREWALL_DRIVER=nova.virt.firewall.NoopFirewallDriver
-NEUTRON_CREATE_INITIAL_NETWORKS=False
-Q_USE_PROVIDERNET_FOR_PUBLIC=True
 
 HOST_IP=10.250.201.24
-Q_ML2_PLUGIN_VLAN_TYPE_OPTIONS=(network_vlan_ranges=bridge:2001:3000)
-OVS_BRIDGE_MAPPINGS=bridge:br-bridge
 
-Q_ENABLE_TRICIRCLE=True
+Q_ML2_PLUGIN_VLAN_TYPE_OPTIONS=(network_vlan_ranges=bridge:2001:3000)
+OVS_BRIDGE_MAPPINGS=bridge:br-vlan
+
+# Specify Central Region name
+# CENTRAL_REGION_NAME=CentralRegion
+
+# Specify port for central Neutron server
+# TRICIRCLE_NEUTRON_PORT=20001
+
+TRICIRCLE_START_SERVICES=True
 enable_plugin tricircle https://github.com/openstack/tricircle/
 
-# Use Neutron instead of nova-network
-disable_service n-net
-enable_service q-svc
-enable_service q-dhcp
-enable_service q-agt
-enable_service q-l3
-
-enable_service c-api
-enable_service c-vol
-enable_service c-sch
-
-disable_service n-obj
-disable_service c-bak
 disable_service tempest
 disable_service horizon
-
-CENTRAL_REGION_NAME=CentralRegion
-TRICIRCLE_NEUTRON_PORT=20001
-
-[[post-config|$NEUTRON_CONF]]
-
-[DEFAULT]
-core_plugin=tricircle.network.local_plugin.TricirclePlugin
-
-[client]
-admin_username=admin
-admin_password=$ADMIN_PASSWORD
-admin_tenant=demo
-auto_refresh_endpoint=True
-top_region_name=$CENTRAL_REGION_NAME
-
-[tricircle]
-real_core_plugin=neutron.plugins.ml2.plugin.Ml2Plugin
-central_neutron_url=http://127.0.0.1:$TRICIRCLE_NEUTRON_PORT
diff --git a/devstack/local.conf.node_2.sample b/devstack/local.conf.node_2.sample
index 50826876..075e1aa8 100644
--- a/devstack/local.conf.node_2.sample
+++ b/devstack/local.conf.node_2.sample
@@ -2,14 +2,16 @@
 # Sample DevStack local.conf.
 #
 # This sample file is intended to be used for your typical Tricircle DevStack
-# multi-node environment. As this file configures, DevStack will setup one
-# bottom region running original Nova, Cinder and Neutron.
+# multi-node environment. As this file has configuration values for DevStack
+# to result in RegionTwo running original Nova, Cinder and Neutron, and
+# the local Neutron will be configured with Tricircle Local Neutron Plugin
+# to work with central Neutron with Tricircle Central Neutron Plugin.
 #
 # This file works with local.conf.node_1.sample to help you build a two-node
-# three-region Tricircle environment. Keystone and Glance in top region are
-# shared by services in all the regions.
+# three-region environment(CentralRegion, RegionOne and RegionTwo). Keystone in
+# RegionOne is shared by services in all the regions.
 #
-# Some options needs to be change to adapt to your environment, see README.md
+# Some options need to be changed to adapt to your environment, see README.rst
 # for detail.
 #
 
@@ -20,22 +22,6 @@ RABBIT_PASSWORD=password
 SERVICE_PASSWORD=password
 SERVICE_TOKEN=password
 ADMIN_PASSWORD=password
-LOGFILE=/opt/stack/logs/stack.sh.log
-VERBOSE=True
-LOG_COLOR=True
-SCREEN_LOGDIR=/opt/stack/logs
-FIXED_RANGE=10.0.0.0/24
-NETWORK_GATEWAY=10.0.0.1
-FIXED_NETWORK_SIZE=256
-FLOATING_RANGE=10.100.100.160/24
-Q_FLOATING_ALLOCATION_POOL=start=10.100.100.160,end=10.100.100.192
-
-PUBLIC_NETWORK_GATEWAY=10.100.100.3
-
-Q_USE_SECGROUP=False
-LIBVIRT_FIREWALL_DRIVER=nova.virt.firewall.NoopFirewallDriver
-NEUTRON_CREATE_INITIAL_NETWORKS=False
-Q_USE_PROVIDERNET_FOR_PUBLIC=True
 
 HOST_IP=10.250.201.25
 REGION_NAME=RegionTwo
@@ -45,41 +31,16 @@ KEYSTONE_SERVICE_HOST=10.250.201.24
 KEYSTONE_AUTH_HOST=10.250.201.24
 
 Q_ML2_PLUGIN_VLAN_TYPE_OPTIONS=(network_vlan_ranges=bridge:2001:3000,extern:3001:4000)
-OVS_BRIDGE_MAPPINGS=bridge:br-bridge,extern:br-ext
+OVS_BRIDGE_MAPPINGS=bridge:br-vlan,extern:br-ext
 
-# Use Neutron instead of nova-network
-disable_service n-net
-enable_service q-svc
-enable_service q-dhcp
-enable_service q-agt
-enable_service q-l3
+# Specify Central Region name
+# CENTRAL_REGION_NAME=CentralRegion
 
-enable_service c-api
-enable_service c-vol
-enable_service c-sch
+# Specify port for central Neutron server
+# TRICIRCLE_NEUTRON_PORT=20001
+
+TRICIRCLE_START_SERVICES=False
+enable_plugin tricircle https://github.com/openstack/tricircle/
 
-disable_service n-obj
-disable_service c-bak
 disable_service tempest
 disable_service horizon
-
-CENTRAL_REGION_NAME=CentralRegion
-TRICIRCLE_NEUTRON_PORT=20001
-
-[[post-config|$NEUTRON_CONF]]
-
-[DEFAULT]
-core_plugin=tricircle.network.local_plugin.TricirclePlugin
-service_plugins=tricircle.network.local_l3_plugin.TricircleL3Plugin
-
-[client]
-admin_username=admin
-admin_password=$ADMIN_PASSWORD
-admin_tenant=demo
-auto_refresh_endpoint=True
-top_region_name=$CENTRAL_REGION_NAME
-
-[tricircle]
-real_core_plugin=neutron.plugins.ml2.plugin.Ml2Plugin
-# change the ip to the ip of the machine hosting central Neutron server
-central_neutron_url=http://10.250.201.24:$TRICIRCLE_NEUTRON_PORT
diff --git a/devstack/plugin.sh b/devstack/plugin.sh
index 5c6deb0b..bb65f9ca 100644
--- a/devstack/plugin.sh
+++ b/devstack/plugin.sh
@@ -54,6 +54,59 @@ function init_common_tricircle_conf {
     iniset $conf_file oslo_concurrency lock_path $TRICIRCLE_STATE_PATH/lock
 }
 
+# common config-file configuration for local Neutron(s)
+function init_local_neutron_conf {
+
+    iniset $NEUTRON_CONF DEFAULT core_plugin tricircle.network.local_plugin.TricirclePlugin
+    iniset $NEUTRON_CONF DEFAULT service_plugins tricircle.network.local_l3_plugin.TricircleL3Plugin
+
+    iniset $NEUTRON_CONF client admin_username admin
+    iniset $NEUTRON_CONF client admin_password $ADMIN_PASSWORD
+    iniset $NEUTRON_CONF client admin_tenant demo
+    iniset $NEUTRON_CONF client auto_refresh_endpoint True
+    iniset $NEUTRON_CONF client top_pod_name $CENTRAL_REGION_NAME
+
+    iniset $NEUTRON_CONF tricircle real_core_plugin neutron.plugins.ml2.plugin.Ml2Plugin
+    iniset $NEUTRON_CONF tricircle central_neutron_url http://$KEYSTONE_SERVICE_HOST:$TRICIRCLE_NEUTRON_PORT
+}
+
+# Set the environment variables for local Neutron(s)
+function init_local_neutron_variables {
+
+    export Q_USE_PROVIDERNET_FOR_PUBLIC=True
+
+    Q_ML2_PLUGIN_VLAN_TYPE_OPTIONS=${Q_ML2_PLUGIN_VLAN_TYPE_OPTIONS:-}
+    # if VLAN options were not set in local.conf, use default VLAN bridge
+    # and VLAN options
+    if [ "$Q_ML2_PLUGIN_VLAN_TYPE_OPTIONS" == "" ]; then
+
+        export TRICIRCLE_ADD_DEFAULT_BRIDGES=True
+
+        local vlan_option="bridge:$TRICIRCLE_DEFAULT_VLAN_RANGE"
+        local ext_option="extern:$TRICIRCLE_DEFAULT_EXT_RANGE"
+        local vlan_ranges=(network_vlan_ranges=$vlan_option)
+        if [ "$TRICIRCLE_START_SERVICES" == "False" ]; then
+            vlan_ranges=(network_vlan_ranges=$vlan_option,$ext_option)
+        fi
+        Q_ML2_PLUGIN_VLAN_TYPE_OPTIONS=$vlan_ranges
+
+        local vlan_mapping="bridge:$TRICIRCLE_DEFAULT_VLAN_BRIDGE"
+        local ext_mapping="extern:$TRICIRCLE_DEFAULT_EXT_BRIDGE"
+        OVS_BRIDGE_MAPPINGS=$vlan_mapping
+        if [ "$TRICIRCLE_START_SERVICES" == "False" ]; then
+            OVS_BRIDGE_MAPPINGS=$vlan_mapping,$ext_mapping
+        fi
+    fi
+}
+
+function add_default_bridges {
+
+    if [ "$TRICIRCLE_ADD_DEFAULT_BRIDGES" == "True" ]; then
+        _neutron_ovs_base_add_bridge $TRICIRCLE_DEFAULT_VLAN_BRIDGE
+        _neutron_ovs_base_add_bridge $TRICIRCLE_DEFAULT_EXT_BRIDGE
+    fi
+}
+
 function configure_tricircle_api {
 
     if is_service_enabled t-api ; then
@@ -132,61 +185,77 @@ function start_central_neutron_server {
     run_process q-svc$server_index "$NEUTRON_BIN_DIR/neutron-server --config-file $NEUTRON_CONF.$server_index --config-file /$Q_PLUGIN_CONF_FILE"
 }
 
+# if the plugin is enabled to run, that means the Tricircle is enabled
+# by default, so no need to judge the variable Q_ENABLE_TRICIRCLE
 
-if [[ "$Q_ENABLE_TRICIRCLE" == "True" ]]; then
-    if [[ "$1" == "stack" && "$2" == "pre-install" ]]; then
-        echo summary "Tricircle pre-install"
-    elif [[ "$1" == "stack" && "$2" == "install" ]]; then
-        echo_summary "Installing Tricircle"
-    elif [[ "$1" == "stack" && "$2" == "post-config" ]]; then
-        echo_summary "Configuring Tricircle"
-        export NEUTRON_CREATE_INITIAL_NETWORKS=False
-        sudo install -d -o $STACK_USER -m 755 $TRICIRCLE_CONF_DIR
+if [[ "$1" == "stack" && "$2" == "pre-install" ]]; then
+    echo_summary "Tricircle pre-install"
 
+    # init_local_neutron_variables before installation
+    init_local_neutron_variables
+
+elif [[ "$1" == "stack" && "$2" == "install" ]]; then
+    echo_summary "Installing Tricircle"
+elif [[ "$1" == "stack" && "$2" == "post-config" ]]; then
+
+    echo_summary "Configuring Tricircle"
+    export NEUTRON_CREATE_INITIAL_NETWORKS=False
+    sudo install -d -o $STACK_USER -m 755 $TRICIRCLE_CONF_DIR
+
+    if [[ "$TRICIRCLE_START_SERVICES" == "True" ]]; then
         enable_service t-api t-job
-
         configure_tricircle_api
         configure_tricircle_xjob
+    fi
 
-        echo export PYTHONPATH=\$PYTHONPATH:$TRICIRCLE_DIR >> $RC_DIR/.localrc.auto
+    echo export PYTHONPATH=\$PYTHONPATH:$TRICIRCLE_DIR >> $RC_DIR/.localrc.auto
 
-        setup_package $TRICIRCLE_DIR -e
+    setup_package $TRICIRCLE_DIR -e
 
+    if [[ "$TRICIRCLE_START_SERVICES" == "True" ]]; then
         recreate_database tricircle
         tricircle-db-manage "$TRICIRCLE_API_CONF"
 
         if is_service_enabled q-svc ; then
             start_central_neutron_server $CENTRAL_REGION_NAME $TRICIRCLE_NEUTRON_PORT
         fi
-
-    elif [[ "$1" == "stack" && "$2" == "extra" ]]; then
-        echo_summary "Initializing Tricircle Service"
-
-        if is_service_enabled t-api; then
-
-            create_tricircle_accounts
-
-            run_process t-api "tricircle-api --config-file $TRICIRCLE_API_CONF"
-        fi
-
-        if is_service_enabled t-job; then
-
-            run_process t-job "tricircle-xjob --config-file $TRICIRCLE_XJOB_CONF"
-        fi
     fi
 
-    if [[ "$1" == "unstack" ]]; then
+    # update the local neutron.conf after the central Neutron has started
+    init_local_neutron_conf
 
-        if is_service_enabled t-api; then
-           stop_process t-api
-        fi
+    # add default bridges br-vlan, br-ext if needed, ovs-vsctl
+    # is just being installed before this stage
+    add_default_bridges
 
-        if is_service_enabled t-job; then
-           stop_process t-job
-        fi
+elif [[ "$1" == "stack" && "$2" == "extra" ]]; then
+    echo_summary "Initializing Tricircle Service"
 
-        if is_service_enabled q-svc0; then
-           stop_process q-svc0
-        fi
+    if is_service_enabled t-api; then
+
+        create_tricircle_accounts
+
+        run_process t-api "tricircle-api --config-file $TRICIRCLE_API_CONF"
+
+    fi
+
+    if is_service_enabled t-job; then
+
+        run_process t-job "tricircle-xjob --config-file $TRICIRCLE_XJOB_CONF"
+    fi
+fi
+
+if [[ "$1" == "unstack" ]]; then
+
+    if is_service_enabled t-api; then
+       stop_process t-api
+    fi
+
+    if is_service_enabled t-job; then
+       stop_process t-job
+    fi
+
+    if is_service_enabled q-svc0; then
+       stop_process q-svc0
     fi
 fi
diff --git a/devstack/settings b/devstack/settings
index cbdec2ca..305f5b97 100644
--- a/devstack/settings
+++ b/devstack/settings
@@ -6,6 +6,15 @@ TRICIRCLE_BRANCH=${TRICIRCLE_BRANCH:-master}
 # common variables
 CENTRAL_REGION_NAME=${CENTRAL_REGION_NAME:-CentralRegion}
 TRICIRCLE_NEUTRON_PORT=${TRICIRCLE_NEUTRON_PORT:-20001}
+TRICIRCLE_START_SERVICES=${TRICIRCLE_START_SERVICES:-True}
+
+# these default settings are used for devstack based gate/check jobs
+TRICIRCLE_DEFAULT_VLAN_BRIDGE=${TRICIRCLE_DEFAULT_VLAN_BRIDGE:-br-vlan}
+TRICIRCLE_DEFAULT_VLAN_RANGE=${TRICIRCLE_DEFAULT_VLAN_RANGE:-101:150}
+TRICIRCLE_DEFAULT_EXT_BRIDGE=${TRICIRCLE_DEFAULT_EXT_BRIDGE:-br-ext}
+TRICIRCLE_DEFAULT_EXT_RANGE=${TRICIRCLE_DEFAULT_EXT_RANGE:-151:200}
+TRICIRCLE_ADD_DEFAULT_BRIDGES=${TRICIRCLE_ADD_DEFAULT_BRIDGES:-False}
+
 TRICIRCLE_CONF_DIR=${TRICIRCLE_CONF_DIR:-/etc/tricircle}
 TRICIRCLE_STATE_PATH=${TRICIRCLE_STATE_PATH:-/var/lib/tricircle}
 
diff --git a/doc/source/multi-pod-installation-devstack.rst b/doc/source/multi-pod-installation-devstack.rst
index f30aa7d4..e5949fed 100644
--- a/doc/source/multi-pod-installation-devstack.rst
+++ b/doc/source/multi-pod-installation-devstack.rst
@@ -83,7 +83,8 @@ for installing DevStack in virtual machine.
 Setup
 ^^^^^
 
-In pod1 in node1,
+In pod1 in node1 for Tricircle service, central Neutron and OpenStack
+RegionOne,
 
 - 1 Install DevStack. Please refer to
   `DevStack document <http://docs.openstack.org/developer/devstack/>`_
@@ -108,22 +109,22 @@ In pod1 in node1,
       Q_ML2_PLUGIN_VLAN_TYPE_OPTIONS=(network_vlan_ranges=bridge:2001:3000)
 
   - the format of OVS_BRIDGE_MAPPINGS is <physical network name>:<ovs bridge name>,
-    you can change these names, but remember to adapt your change to the commands
-    showed in this guide::
+    you can change these names, but remember to adapt your change to the
+    commands showed in this guide::
 
-      OVS_BRIDGE_MAPPINGS=bridge:br-bridge
+      OVS_BRIDGE_MAPPINGS=bridge:br-vlan
 
-  - set Q_USE_PROVIDERNET_FOR_PUBLIC to True(it's False by default) if you would
-    like to try l3 north-south networking::
+  - set TRICIRCLE_START_SERVICES to True to install the Tricircle service and
+    central Neutron in node1::
 
-      Q_USE_PROVIDERNET_FOR_PUBLIC=True
+      TRICIRCLE_START_SERVICES=True
 
 - 4 Create OVS bridge and attach the VLAN network interface to it ::
 
-    sudo ovs-vsctl add-br br-bridge
-    sudo ovs-vsctl add-port br-bridge eth1
+    sudo ovs-vsctl add-br br-vlan
+    sudo ovs-vsctl add-port br-vlan eth1
 
-  br-bridge is the OVS bridge name you configure on OVS_PHYSICAL_BRIDGE, eth1 is
+  br-vlan is the OVS bridge name you configure on OVS_PHYSICAL_BRIDGE, eth1 is
   the device name of your VLAN network interface
 
 - 5 Run DevStack. In DevStack folder, run ::
@@ -132,7 +133,7 @@ In pod1 in node1,
 
 - 6 After DevStack successfully starts, begin to setup node2.
 
-In pod2 in node2,
+In pod2 in node2 for OpenStack RegionTwo,
 
 - 1 Install DevStack. Please refer to
   `DevStack document <http://docs.openstack.org/developer/devstack/>`_
@@ -168,16 +169,12 @@ In pod2 in node2,
     you can change these names, but remember to adapt your change to the commands
     showed in this guide::
 
-      OVS_BRIDGE_MAPPINGS=bridge:br-bridge,extern:br-ext
+      OVS_BRIDGE_MAPPINGS=bridge:br-vlan,extern:br-ext
 
-  - set Q_USE_PROVIDERNET_FOR_PUBLIC to True(it's False by default) if you would
-    like to try l3 north-south networking::
+  - set TRICIRCLE_START_SERVICES to False(it's True by default) so Tricircle
+    services and central Neutron will not be started in node2::
 
-      Q_USE_PROVIDERNET_FOR_PUBLIC=True
-
-  - change the ip in central_neutron_url to management interface ip of node1::
-
-      central_neutron_url=http://10.250.201.24:$TRICIRCLE_NEUTRON_PORT
+      TRICIRCLE_START_SERVICES=False
 
   In this guide, we define two physical networks in node2, one is "bridge" for
   bridge network, the other one is "extern" for external network. If you do not
@@ -188,29 +185,20 @@ In pod2 in node2,
 
 - 4 Create OVS bridge and attach the VLAN network interface to it ::
 
-    sudo ovs-vsctl add-br br-bridge
-    sudo ovs-vsctl add-port br-bridge eth1
+    sudo ovs-vsctl add-br br-vlan
+    sudo ovs-vsctl add-port br-vlan eth1
     sudo ovs-vsctl add-br br-ext
     sudo ovs-vsctl add-port br-ext eth2
 
-  br-bridge and br-ext are the OVS bridge names you configure on
+  br-vlan and br-ext are the OVS bridge names you configure on
   OVS_PHYSICAL_BRIDGE, eth1 and eth2 are the device names of your VLAN network
   interfaces, for the "bridge" network and the external network.
 
-- 5 In /opt/stack folder (create this folder if it does not exist), then run ::
-
-    git clone https://github.com/openstack/tricircle
-
-- 6 After the Tricircle source code is cloned, install Tricircle manually ::
-
-    cd tricircle/
-    sudo pip install -e .
-
-- 7 Run DevStack. In DevStack folder, run ::
+- 5 Run DevStack. In DevStack folder, run ::
 
     ./stack.sh
 
-- 8 After DevStack successfully starts, the setup is finished.
+- 6 After DevStack successfully starts, the setup is finished.
 
 How to play
 ^^^^^^^^^^^