diff --git a/files/apts/trema b/files/apts/trema
new file mode 100644
index 0000000000..e33ccd3004
--- /dev/null
+++ b/files/apts/trema
@@ -0,0 +1,15 @@
+# Trema
+gcc
+make
+ruby1.8
+rubygems1.8
+ruby1.8-dev
+libpcap-dev
+libsqlite3-dev
+
+# Sliceable Switch
+sqlite3
+libdbi-perl
+libdbd-sqlite3-perl
+apache2
+libjson-perl
diff --git a/lib/quantum_plugins/nec b/lib/quantum_plugins/nec
new file mode 100644
index 0000000000..f61f50bba5
--- /dev/null
+++ b/lib/quantum_plugins/nec
@@ -0,0 +1,122 @@
+# Quantum NEC OpenFlow plugin
+# ---------------------------
+
+# Save trace setting
+MY_XTRACE=$(set +o | grep xtrace)
+set +o xtrace
+
+# Configuration parameters
+OFC_HOST=${OFC_HOST:-127.0.0.1}
+OFC_PORT=${OFC_PORT:-8888}
+
+OFC_API_HOST=${OFC_API_HOST:-$OFC_HOST}
+OFC_API_PORT=${OFC_API_PORT:-$OFC_PORT}
+OFC_OFP_HOST=${OFC_OFP_HOST:-$OFC_HOST}
+OFC_OFP_PORT=${OFC_OFP_PORT:-6633}
+OFC_DRIVER=${OFC_DRIVER:-trema}
+OFC_RETRY_MAX=${OFC_RETRY_MAX:-0}
+OFC_RETRY_INTERVAL=${OFC_RETRY_INTERVAL:-1}
+
+OVS_BRIDGE=${OVS_BRIDGE:-br-int}
+
+# Main logic
+# ---------------------------
+
+source $TOP_DIR/lib/quantum_plugins/ovs_base
+
+function quantum_plugin_create_nova_conf() {
+    _quantum_ovs_base_configure_nova_vif_driver
+}
+
+function quantum_plugin_install_agent_packages() {
+    # SKIP_OVS_INSTALL is useful when we want to use Open vSwitch whose
+    # version is different from the version provided by the distribution.
+    if [[ "$SKIP_OVS_INSTALL" = "True" ]]; then
+        echo "You need to install Open vSwitch manually."
+        return
+    fi
+    _quantum_ovs_base_install_agent_packages
+}
+
+function quantum_plugin_configure_common() {
+    Q_PLUGIN_CONF_PATH=etc/quantum/plugins/nec
+    Q_PLUGIN_CONF_FILENAME=nec.ini
+    Q_DB_NAME="quantum_nec"
+    Q_PLUGIN_CLASS="quantum.plugins.nec.nec_plugin.NECPluginV2"
+}
+
+function quantum_plugin_configure_debug_command() {
+    _quantum_ovs_base_configure_debug_command
+}
+
+function quantum_plugin_configure_dhcp_agent() {
+    :
+}
+
+function quantum_plugin_configure_l3_agent() {
+    _quantum_ovs_base_configure_l3_agent
+}
+
+function quantum_plugin_configure_plugin_agent() {
+    if [[ "$SKIP_OVS_BRIDGE_SETUP" = "True" ]]; then
+        return
+    fi
+    # Set up integration bridge
+    _quantum_ovs_base_setup_bridge $OVS_BRIDGE
+    sudo ovs-vsctl --no-wait set-controller $OVS_BRIDGE tcp:$OFC_OFP_HOST:$OFC_OFP_PORT
+    # Generate datapath ID from HOST_IP
+    local dpid=$(printf "0x%07d%03d%03d%03d\n" ${HOST_IP//./ })
+    sudo ovs-vsctl --no-wait set Bridge $OVS_BRIDGE other-config:datapath-id=$dpid
+    sudo ovs-vsctl --no-wait set-fail-mode $OVS_BRIDGE secure
+    if [ -n "$OVS_INTERFACE" ]; then
+        sudo ovs-vsctl --no-wait -- --may-exist add-port $OVS_BRIDGE $OVS_INTERFACE
+    fi
+    _quantum_setup_ovs_tunnels $OVS_BRIDGE
+    AGENT_BINARY="$QUANTUM_DIR/bin/quantum-nec-agent"
+
+    _quantum_ovs_base_configure_firewall_driver
+}
+
+function quantum_plugin_configure_service() {
+    iniset $QUANTUM_CONF DEFAULT api_extensions_path quantum/plugins/nec/extensions/
+    iniset /$Q_PLUGIN_CONF_FILE OFC host $OFC_API_HOST
+    iniset /$Q_PLUGIN_CONF_FILE OFC port $OFC_API_PORT
+    iniset /$Q_PLUGIN_CONF_FILE OFC driver $OFC_DRIVER
+    iniset /$Q_PLUGIN_CONF_FILE OFC api_retry_max OFC_RETRY_MAX
+    iniset /$Q_PLUGIN_CONF_FILE OFC api_retry_interval OFC_RETRY_INTERVAL
+}
+
+function quantum_plugin_setup_interface_driver() {
+    local conf_file=$1
+    iniset $conf_file DEFAULT interface_driver quantum.agent.linux.interface.OVSInterfaceDriver
+    iniset $conf_file DEFAULT ovs_use_veth True
+}
+
+# Utility functions
+# ---------------------------
+
+# Setup OVS tunnel manually
+function _quantum_setup_ovs_tunnels() {
+    local bridge=$1
+    local id=0
+    GRE_LOCAL_IP=${GRE_LOCAL_IP:-$HOST_IP}
+    if [ -n "$GRE_REMOTE_IPS" ]; then
+         for ip in ${GRE_REMOTE_IPS//:/ }
+         do
+             if [[ "$ip" == "$GRE_LOCAL_IP" ]]; then
+                 continue
+             fi
+             sudo ovs-vsctl --no-wait add-port $bridge gre$id -- \
+                 set Interface gre$id type=gre options:remote_ip=$ip
+             id=`expr $id + 1`
+         done
+    fi
+}
+
+function has_quantum_plugin_security_group() {
+    # 0 means True here
+    return 0
+}
+
+# Restore xtrace
+$MY_XTRACE
diff --git a/lib/quantum_thirdparty/trema b/lib/quantum_thirdparty/trema
new file mode 100644
index 0000000000..09dc46bd83
--- /dev/null
+++ b/lib/quantum_thirdparty/trema
@@ -0,0 +1,113 @@
+# Trema Sliceable Switch
+# ----------------------
+
+# Trema is a Full-Stack OpenFlow Framework in Ruby and C
+# https://github.com/trema/trema
+#
+# Trema Sliceable Switch is an OpenFlow controller which provides
+# virtual layer-2 network slices.
+# https://github.com/trema/apps/wiki
+
+# Trema Sliceable Switch (OpenFlow Controller)
+TREMA_APPS_REPO=${TREMA_APPS_REPO:-https://github.com/trema/apps.git}
+TREMA_APPS_BRANCH=${TREMA_APPS_BRANCH:-master}
+
+# Save trace setting
+MY_XTRACE=$(set +o | grep xtrace)
+set +o xtrace
+
+TREMA_DIR=${TREMA_DIR:-$DEST/trema}
+TREMA_SS_DIR="$TREMA_DIR/apps/sliceable_switch"
+
+TREMA_DATA_DIR=${TREMA_DATA_DIR:-$DATA_DIR/trema}
+TREMA_SS_ETC_DIR=$TREMA_DATA_DIR/sliceable_switch/etc
+TREMA_SS_DB_DIR=$TREMA_DATA_DIR/sliceable_switch/db
+TREMA_SS_SCRIPT_DIR=$TREMA_DATA_DIR/sliceable_switch/script
+TREMA_TMP_DIR=$TREMA_DATA_DIR/trema
+
+TREMA_LOG_LEVEL=${TREMA_LOG_LEVEL:-info}
+
+TREMA_SS_CONFIG=$TREMA_SS_ETC_DIR/sliceable.conf
+TREMA_SS_APACHE_CONFIG=/etc/apache2/sites-available/sliceable_switch
+
+# configure_trema - Set config files, create data dirs, etc
+function configure_trema() {
+    # prepare dir
+    for d in $TREMA_SS_ETC_DIR $TREMA_SS_DB_DIR $TREMA_SS_SCRIPT_DIR; do
+        sudo mkdir -p $d
+        sudo chown -R `whoami` $d
+    done
+    sudo mkdir -p $TREMA_TMP_DIR
+}
+
+# init_trema - Initialize databases, etc.
+function init_trema() {
+    local _pwd=$(pwd)
+
+    # Initialize databases for Sliceable Switch
+    cd $TREMA_SS_DIR
+    rm -f filter.db slice.db
+    ./create_tables.sh
+    mv filter.db slice.db $TREMA_SS_DB_DIR
+    # Make sure that apache cgi has write access to the databases
+    sudo chown -R www-data.www-data $TREMA_SS_DB_DIR
+    cd $_pwd
+
+    # Setup HTTP Server for sliceable_switch
+    cp $TREMA_SS_DIR/{Slice.pm,Filter.pm,config.cgi} $TREMA_SS_SCRIPT_DIR
+    sed -i -e "s|/home/sliceable_switch/db|$TREMA_SS_DB_DIR|" \
+        $TREMA_SS_SCRIPT_DIR/config.cgi
+
+    sudo cp $TREMA_SS_DIR/apache/sliceable_switch $TREMA_SS_APACHE_CONFIG
+    sudo sed -i -e "s|/home/sliceable_switch/script|$TREMA_SS_SCRIPT_DIR|" \
+        $TREMA_SS_APACHE_CONFIG
+    sudo a2enmod rewrite actions
+    sudo a2ensite sliceable_switch
+
+    cp $TREMA_SS_DIR/sliceable_switch_null.conf $TREMA_SS_CONFIG
+    sed -i -e "s|^\$apps_dir.*$|\$apps_dir = \"$TREMA_DIR/apps\"|" \
+           -e "s|^\$db_dir.*$|\$db_dir = \"$TREMA_SS_DB_DIR\"|" \
+           $TREMA_SS_CONFIG
+}
+
+function gem_install() {
+    [[ "$OFFLINE" = "True" ]] && return
+    [ -n "$RUBYGEMS_CMD" ] || get_gem_command
+
+    local pkg=$1
+    $RUBYGEMS_CMD list | grep "^${pkg} " && return
+    sudo $RUBYGEMS_CMD install $pkg
+}
+
+function get_gem_command() {
+    # Trema requires ruby 1.8, so gem1.8 is checked first
+    RUBYGEMS_CMD=$(which gem1.8 || which gem)
+    if [ -z "$RUBYGEMS_CMD" ]; then
+        echo "Warning: ruby gems command not found."
+    fi
+}
+
+function install_trema() {
+    # Trema
+    gem_install trema
+    # Sliceable Switch
+    git_clone $TREMA_APPS_REPO $TREMA_DIR/apps $TREMA_APPS_BRANCH
+    make -C $TREMA_DIR/apps/topology
+    make -C $TREMA_DIR/apps/flow_manager
+    make -C $TREMA_DIR/apps/sliceable_switch
+}
+
+function start_trema() {
+    # APACHE_NAME is defined in init_horizon (in lib/horizon)
+    restart_service $APACHE_NAME
+
+    sudo LOGGING_LEVEL=$TREMA_LOG_LEVEL TREMA_TMP=$TREMA_TMP_DIR \
+        trema run -d -c $TREMA_SS_CONFIG
+}
+
+function stop_trema() {
+    sudo TREMA_TMP=$TREMA_TMP_DIR trema killall
+}
+
+# Restore xtrace
+$MY_XTRACE