diff --git a/Fabric/Utilities/acctonUseDpctl/nat.py b/Fabric/Utilities/acctonUseDpctl/nat.py
new file mode 100755
index 0000000..04f267a
--- /dev/null
+++ b/Fabric/Utilities/acctonUseDpctl/nat.py
@@ -0,0 +1,400 @@
+
+# Copyright 2017-present Open Networking 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.
+
+
+import logging
+import oftest.base_tests as base_tests
+from oftest import config
+from oftest.testutils import *
+from util import *
+from accton_util import convertIP4toStr as toIpV4Str
+from accton_util import convertMACtoStr as toMacStr
+
+
+class dnat(base_tests.SimpleDataPlane):
+    """
+    [DNAT]
+      DNAT (inbound)
+
+    Inject  eth 1/3 DA000000000200, SA000000000201, Tag 200, SIP 200.0.0.1, DIP 100.0.0.01, Sport 2828, Dport 5000
+    Output  eth 1/1 DA000000000101, SA000000000100, Tag 100, SIP 200.0.0.1, DIP 10.0.0.01, Sport 2828, Dport 2000
+
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=10,cmd=add,prio=101 in_port=3,vlan_vid=0x10c8/0x1fff goto:20
+    ./dpctl tcp:192.168.1.1:6633 group-mod cmd=add,type=ind,group=0x640001 group=any,port=any,weight=0 output=1
+    ./dpctl tcp:192.168.1.1:6633 group-mod cmd=add,type=ind,group=0x23000001 group=any,port=any,weight=0 set_field=eth_src=00:00:00:00:01:00,set_field=eth_dst=00:00:00:00:01:01,set_field=vlan_vid=100,group=0x640001
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=20,cmd=add,prio=201 vlan_vid=200/0xfff,eth_dst=00:00:00:00:02:00,eth_type=0x0800 goto:28
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=28,cmd=add,prio=281 eth_type=0x800,ip_dst=100.0.0.1,ip_proto=6,tcp_dst=5000 write:set_field=ip_dst:10.0.0.1,set_field=tcp_dst:2000,group=0x23000001 goto:60
+    """
+    def runTest(self):
+        delete_all_flows(self.controller)
+        delete_all_groups(self.controller)
+
+        test_ports = sorted(config["port_map"].keys())
+
+        input_port = test_ports[0]
+        output_port = test_ports[1]
+
+        apply_dpctl_mod(self, config, "meter-mod cmd=del,meter=0xffffffff")
+        apply_dpctl_mod(self, config, "flow-mod table=10,cmd=add,prio=101 in_port="+str(input_port)+",vlan_vid=0x10c8/0x1fff goto:20")
+        apply_dpctl_mod(self, config, "group-mod cmd=add,type=ind,group=0x64000"+str(output_port)+" group=any,port=any,weight=0 output="+str(output_port))
+        apply_dpctl_mod(self, config, "group-mod cmd=add,type=ind,group=0x23000001 group=any,port=any,weight=0 set_field=eth_src=00:00:00:00:01:00,set_field=eth_dst=00:00:00:00:01:01,set_field=vlan_vid=100,group=0x64000"+str(output_port))
+        apply_dpctl_mod(self, config, "flow-mod table=20,cmd=add,prio=201 vlan_vid=200/0xfff,eth_dst=00:00:00:00:02:00,eth_type=0x0800 goto:28")
+        apply_dpctl_mod(self, config, "flow-mod table=28,cmd=add,prio=281 eth_type=0x800,ip_dst=100.0.0.1,ip_proto=6,tcp_dst=5000 write:set_field=ip_dst:10.0.0.1,set_field=tcp_dst:2000,group=0x23000001 goto:60")
+
+        input_pkt = simple_packet(
+                '00 00 00 00 02 00 00 00 00 00 02 01 81 00 00 c8 '
+                '08 00 45 00 00 2a 04 d2 00 00 7f 06 0a fa c8 00 '
+                '00 01 64 00 00 01 0b 0c 13 88 00 01 f7 fa 00 00 '
+                '00 00 50 00 04 00 69 50 00 00 00 00')
+
+        output_pkt = simple_packet(
+                '00 00 00 00 01 01 00 00 00 00 01 00 81 00 00 64 '
+                '08 00 45 00 00 2a 04 d2 00 00 7e 06 65 fa c8 00 '
+                '00 01 0a 00 00 01 0b 0c 07 d0 00 01 f7 fa 00 00 '
+                '00 00 50 00 04 00 cf 08 00 00 00 00')
+
+        self.dataplane.send(input_port, str(input_pkt))
+        verify_packet(self, str(output_pkt), output_port)
+
+
+class dnat_vrf(base_tests.SimpleDataPlane):
+    """
+    [DNAT VRF]
+      DNAT (inbound) with specified VRF
+
+    Inject  eth 1/3 DA000000000200, SA000000000201, Tag 200, SIP 200.0.0.1, DIP 100.0.0.01, Sport 2828, Dport 5000
+    Output  eth 1/1 DA000000000101, SA000000000100, Tag 100, SIP 200.0.0.1, DIP 10.0.0.01, Sport 2828, Dport 2000
+
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=10,cmd=add,prio=101 in_port=3,vlan_vid=0x10c8/0x1fff goto:20 apply:set_field=ofdpa_vrf:3
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=10,cmd=add,prio=101 in_port=1,vlan_vid=0x1064/0x1fff goto:20 apply:set_field=ofdpa_vrf:3
+    ./dpctl tcp:192.168.1.1:6633 group-mod cmd=add,type=ind,group=0x640001 group=any,port=any,weight=0 output=1
+    ./dpctl tcp:192.168.1.1:6633 group-mod cmd=add,type=ind,group=0x23000001 group=any,port=any,weight=0 set_field=eth_src=00:00:00:00:01:00,set_field=eth_dst=00:00:00:00:01:01,set_field=vlan_vid=100,group=0x640001
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=20,cmd=add,prio=201 vlan_vid=200/0xfff,eth_dst=00:00:00:00:02:00,eth_type=0x0800 goto:28
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=28,cmd=add,prio=281 eth_type=0x800,ip_dst=100.0.0.1,ip_proto=6,tcp_dst=5000,ofdpa_vrf=3 write:set_field=ip_dst:10.0.0.1,set_field=tcp_dst:2000,group=0x23000001 goto:60
+    """
+    def runTest(self):
+        delete_all_flows(self.controller)
+        delete_all_groups(self.controller)
+
+        test_ports = sorted(config["port_map"].keys())
+
+        input_port = test_ports[0]
+        output_port = test_ports[1]
+
+        apply_dpctl_mod(self, config, "meter-mod cmd=del,meter=0xffffffff")
+        apply_dpctl_mod(self, config, "flow-mod table=10,cmd=add,prio=101 in_port="+str(input_port)+",vlan_vid=0x10c8/0x1fff goto:20 apply:set_field=ofdpa_vrf:3")
+        apply_dpctl_mod(self, config, "flow-mod table=10,cmd=add,prio=101 in_port="+str(output_port)+",vlan_vid=0x1064/0x1fff goto:20 apply:set_field=ofdpa_vrf:3")
+        apply_dpctl_mod(self, config, "group-mod cmd=add,type=ind,group=0x64000"+str(output_port)+" group=any,port=any,weight=0 output="+str(output_port))
+        apply_dpctl_mod(self, config, "group-mod cmd=add,type=ind,group=0x23000001 group=any,port=any,weight=0 set_field=eth_src=00:00:00:00:01:00,set_field=eth_dst=00:00:00:00:01:01,set_field=vlan_vid=100,group=0x64000"+str(output_port))
+        apply_dpctl_mod(self, config, "flow-mod table=20,cmd=add,prio=201 vlan_vid=200/0xfff,eth_dst=00:00:00:00:02:00,eth_type=0x0800 goto:28")
+        apply_dpctl_mod(self, config, "flow-mod table=28,cmd=add,prio=281 eth_type=0x800,ip_dst=100.0.0.1,ip_proto=6,tcp_dst=5000,ofdpa_vrf=3 write:set_field=ip_dst:10.0.0.1,set_field=tcp_dst:2000,group=0x23000001 goto:60")
+
+        input_pkt = simple_packet(
+                '00 00 00 00 02 00 00 00 00 00 02 01 81 00 00 c8 '
+                '08 00 45 00 00 2a 04 d2 00 00 7f 06 0a fa c8 00 '
+                '00 01 64 00 00 01 0b 0c 13 88 00 01 f7 fa 00 00 '
+                '00 00 50 00 04 00 69 50 00 00 00 00')
+
+        output_pkt = simple_packet(
+                '00 00 00 00 01 01 00 00 00 00 01 00 81 00 00 64 '
+                '08 00 45 00 00 2a 04 d2 00 00 7e 06 65 fa c8 00 '
+                '00 01 0a 00 00 01 0b 0c 07 d0 00 01 f7 fa 00 00 '
+                '00 00 50 00 04 00 cf 08 00 00 00 00')
+
+        self.dataplane.send(input_port, str(input_pkt))
+        verify_packet(self, str(output_pkt), output_port)
+
+"""
+currently this case will fail, due to packet rx SRC IP problem
+"""
+class dnat_ecmp(base_tests.SimpleDataPlane):
+    """
+    [DNAT ECMP]
+      DNAT (inbound) with ECMP
+
+    Inject  eth 1/3 DA000000000200, SA000000000201, Tag 200, SIP 200.0.0.1, DIP 100.0.0.01, Sport 2828, Dport 5000 [increase SIP]
+    Output  eth 1/1 DA000000000101, SA000000000100, Tag 100, SIP 200.0.0.X, DIP 10.0.0.01, Sport 2828, Dport 2000
+    Output  eth 1/5 DA000005224466, SA000005223355, Tag 2, SIP 200.0.0.X, DIP 10.0.0.01, Sport 2828, Dport 2000
+
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=10,cmd=add,prio=101 in_port=3,vlan_vid=0x10c8/0x1fff goto:20
+    ./dpctl tcp:192.168.1.1:6633 group-mod cmd=add,type=ind,group=0x640001 group=any,port=any,weight=0 output=1
+    ./dpctl tcp:192.168.1.1:6633 group-mod cmd=add,type=ind,group=0x23000001 group=any,port=any,weight=0 set_field=eth_src=00:00:00:00:01:00,set_field=eth_dst=00:00:00:00:01:01,set_field=vlan_vid=100,group=0x640001
+    ./dpctl tcp:192.168.1.1:6633 group-mod cmd=add,type=ind,group=0x20005 group=any,port=any,weight=0 output=5
+    ./dpctl tcp:192.168.1.1:6633 group-mod cmd=add,type=ind,group=0x23000005 group=any,port=any,weight=0 set_field=eth_src=00:00:05:22:33:55,set_field=eth_dst=00:00:05:22:44:66,set_field=vlan_vid=2,group=0x20005
+    ./dpctl tcp:192.168.1.1:6633 group-mod cmd=add,type=sel,group=0x71000001 group=any,port=any,weight=0 group=0x23000001 group=any,port=any,weight=0 group=0x23000005
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=20,cmd=add,prio=201 vlan_vid=200/0xfff,eth_dst=00:00:00:00:02:00,eth_type=0x0800 goto:28
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=28,cmd=add,prio=281 eth_type=0x800,ip_dst=100.0.0.1,ip_proto=6,tcp_dst=5000 write:set_field=ip_dst:10.0.0.1,set_field=tcp_dst:2000,group=0x71000001 goto:60
+    """
+    def runTest(self):
+        delete_all_flows(self.controller)
+        delete_all_groups(self.controller)
+
+        test_ports = sorted(config["port_map"].keys())
+
+        input_port = test_ports[0]
+        output_port = test_ports[1]
+        output_port2 = test_ports[2]
+
+        apply_dpctl_mod(self, config, "meter-mod cmd=del,meter=0xffffffff")
+        apply_dpctl_mod(self, config, "flow-mod table=10,cmd=add,prio=101 in_port="+str(input_port)+",vlan_vid=0x10c8/0x1fff goto:20 apply:set_field=ofdpa_vrf:3")
+        apply_dpctl_mod(self, config, "group-mod cmd=add,type=ind,group=0x64000"+str(output_port)+" group=any,port=any,weight=0 output="+str(output_port))
+        apply_dpctl_mod(self, config, "group-mod cmd=add,type=ind,group=0x23000001 group=any,port=any,weight=0 set_field=eth_src=00:00:00:00:01:00,set_field=eth_dst=00:00:00:00:01:01,set_field=vlan_vid=100,group=0x64000"+str(output_port))
+        apply_dpctl_mod(self, config, "group-mod cmd=add,type=ind,group=0x2000"+str(output_port2)+" group=any,port=any,weight=0 output="+str(output_port2))
+        apply_dpctl_mod(self, config, "group-mod cmd=add,type=ind,group=0x23000005 group=any,port=any,weight=0 set_field=eth_src=00:00:05:22:33:55,set_field=eth_dst=00:00:05:22:44:66,set_field=vlan_vid=2,group=0x2000"+str(output_port2))
+        apply_dpctl_mod(self, config, "group-mod cmd=add,type=sel,group=0x71000001 group=any,port=any,weight=0 group=0x23000001 group=any,port=any,weight=0 group=0x23000005")
+        apply_dpctl_mod(self, config, "flow-mod table=20,cmd=add,prio=201 vlan_vid=200/0xfff,eth_dst=00:00:00:00:02:00,eth_type=0x0800 goto:28")
+        apply_dpctl_mod(self, config, "flow-mod table=28,cmd=add,prio=281 eth_type=0x800,ip_dst=100.0.0.1,ip_proto=6,tcp_dst=5000 write:set_field=ip_dst:10.0.0.1,set_field=tcp_dst:2000,group=0x71000001 goto:60")
+
+        #increased SIP
+        input_pkt = simple_packet(
+                '00 00 00 00 02 00 00 00 00 00 02 01 81 00 00 c8 '
+                '08 00 45 00 00 2a 04 d2 00 00 7f 06 0a fa c8 00 '
+                '00 01 64 00 00 01 0b 0c 13 88 00 01 f7 fa 00 00 '
+                '00 00 50 00 04 00 69 50 00 00 00 00')
+
+        #random SIP
+        output_pkt = simple_packet(
+                '00 00 00 00 01 01 00 00 00 00 01 00 81 00 00 64 '
+                '08 00 45 00 00 2a 04 d2 00 00 7e 06 65 ee c8 00 '
+                '00 0d 0a 00 00 01 0b 0c 07 d0 00 01 f7 fa 00 00 '
+                '00 00 50 00 04 00 ce fc 00 00 00 00')
+
+        #random SIP
+        output_pkt2 = simple_packet(
+                '00 00 05 22 44 66 00 00 05 22 33 55 81 00 00 02 '
+                '08 00 45 00 00 2a 04 d2 00 00 7e 06 65 ef c8 00 '
+                '00 0c 0a 00 00 01 0b 0c 07 d0 00 01 f7 fa 00 00 '
+                '00 00 50 00 04 00 ce fd 00 00 00 00')
+
+        self.dataplane.send(input_port, str(input_pkt))
+        verify_packet(self, str(output_pkt), output_port)
+        self.dataplane.send(input_port, str(input_pkt))
+        verify_packet(self, str(output_pkt2), output_port2)
+
+
+class dnat_decap_mpls(base_tests.SimpleDataPlane):
+    """
+    [Decap MPLS label and DNAT]
+      Decap MPLS label and DNAT
+
+    Inject  eth 1/3 Tag 12, SA000000112233, DA000000000111, MPLS 0x1234, SIP 200.0.0.1, DIP 100.0.0.1
+    Output  eth 1/1 DA000000000101, SA000000000100, Tag 100, SIP 200.0.0.1, DIP 10.0.0.01
+
+    ./dpctl tcp:192.168.1.1:6633 group-mod cmd=add,type=ind,group=0x640001 group=any,port=any,weight=0 output=1
+    ./dpctl tcp:192.168.1.1:6633 group-mod cmd=add,type=ind,group=0x23000001 group=any,port=any,weight=0 set_field=eth_src=00:00:00:00:01:00,set_field=eth_dst=00:00:00:00:01:01,set_field=vlan_vid=100,group=0x640001
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=10,cmd=add,prio=101 in_port=3,vlan_vid=0x100c/0x1fff apply:set_field=ofdpa_vrf:1 goto:20
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=20,cmd=add,prio=201 vlan_vid=12/0xfff,eth_dst=00:00:00:00:01:11,eth_type=0x8847 goto:24
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=24,cmd=add,prio=204 eth_type=0x8847,mpls_label=0x1234,mpls_bos=1,ofdpa_mpls_data_first_nibble=4 apply:mpls_dec,pop_mpls=0x0800,set_field=ofdpa_vrf:1 goto:30
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=28,cmd=add,prio=281 eth_type=0x800,ip_dst=100.0.0.1,ofdpa_vrf=1 write:set_field=ip_dst:10.0.0.1,group=0x23000001 goto:60
+    """
+    def runTest(self):
+        delete_all_flows(self.controller)
+        delete_all_groups(self.controller)
+
+        test_ports = sorted(config["port_map"].keys())
+
+        input_port = test_ports[0]
+        output_port = test_ports[1]
+
+        apply_dpctl_mod(self, config, "meter-mod cmd=del,meter=0xffffffff")
+        apply_dpctl_mod(self, config, "group-mod cmd=add,type=ind,group=0x64000"+str(output_port)+" group=any,port=any,weight=0 output="+str(output_port))
+        apply_dpctl_mod(self, config, "group-mod cmd=add,type=ind,group=0x23000001 group=any,port=any,weight=0 set_field=eth_src=00:00:00:00:01:00,set_field=eth_dst=00:00:00:00:01:01,set_field=vlan_vid=100,group=0x64000"+str(output_port))
+        apply_dpctl_mod(self, config, "flow-mod table=10,cmd=add,prio=101 in_port="+str(input_port)+",vlan_vid=0x100c/0x1fff apply:set_field=ofdpa_vrf:1 goto:20")
+        apply_dpctl_mod(self, config, "flow-mod table=20,cmd=add,prio=201 vlan_vid=12/0xfff,eth_dst=00:00:00:00:01:11,eth_type=0x8847 goto:24")
+        apply_dpctl_mod(self, config, "flow-mod table=24,cmd=add,prio=204 eth_type=0x8847,mpls_label=0x1234,mpls_bos=1,ofdpa_mpls_data_first_nibble=4 apply:mpls_dec,pop_mpls=0x0800,set_field=ofdpa_vrf:1 goto:30")
+        apply_dpctl_mod(self, config, "flow-mod table=28,cmd=add,prio=281 eth_type=0x800,ip_dst=100.0.0.1,ofdpa_vrf=1 write:set_field=ip_dst:10.0.0.1,group=0x23000001 goto:60")
+
+        input_pkt = simple_packet(
+                '00 00 00 00 01 11 00 00 00 11 22 33 81 00 00 0c '
+                '88 47 01 23 41 3f 45 00 00 26 00 00 00 00 3f 00 '
+                '4f d6 c8 00 00 01 64 00 00 01 00 01 02 03 04 05 '
+                '06 07 08 09 0a 0b 0c 0d 0e 0f 10 11 12 13 14 15 '
+                '16 17 18 19')
+
+        output_pkt = simple_packet(
+                '00 00 00 00 01 01 00 00 00 00 01 00 81 00 00 64 '
+                '08 00 45 00 00 26 00 00 00 00 3e 00 aa d6 c8 00 '
+                '00 01 0a 00 00 01 00 01 02 03 04 05 06 07 08 09 '
+                '0a 0b 0c 0d 0e 0f 10 11 12 13 14 15 16 17 18 19')
+
+        self.dataplane.send(input_port, str(input_pkt))
+        verify_packet(self, str(output_pkt), output_port)
+
+
+class snat(base_tests.SimpleDataPlane):
+    """
+    [SNAT]
+      SNAT (outbound)
+
+    Inject  eth 1/1 DA000000000100, SA000000000101, Tag 100, SIP 10.0.0.1, DIP 200.0.0.01, Sport 2000, Dport 2828
+    Output  eth 1/3 DA000000000200, SA000000000201, Tag 200, SIP 100.0.0.1, DIP 200.0.0.01, Sport 5000, Dport 2828
+
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=10,cmd=add,prio=101 in_port=1,vlan_vid=0x1064/0x1fff goto:20
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=20,cmd=add,prio=201 vlan_vid=100/0xfff,eth_dst=00:00:00:00:01:00,eth_type=0x0800 goto:29
+    ./dpctl tcp:192.168.1.1:6633 group-mod cmd=add,type=ind,group=0xC80003 group=any,port=any,weight=0 output=3
+    ./dpctl tcp:192.168.1.1:6633 group-mod cmd=add,type=ind,group=0x22000002 group=any,port=any,weight=0 set_field=eth_src=00:00:00:00:02:00,set_field=eth_dst=00:00:00:00:02:01,set_field=vlan_vid=200,group=0xC80003
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=29,cmd=add,prio=291 eth_type=0x800,ip_src=10.0.0.1,ip_proto=6,tcp_src=2000 write:set_field=ip_src:100.0.0.1,set_field=tcp_src:5000 goto:30
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=30,cmd=add,prio=301 eth_type=0x0800,ip_dst=200.0.0.1/255.255.255.0 write:group=0x22000002 goto:60
+    """
+    def runTest(self):
+        delete_all_flows(self.controller)
+        delete_all_groups(self.controller)
+
+        test_ports = sorted(config["port_map"].keys())
+
+        input_port = test_ports[0]
+        output_port = test_ports[1]
+
+        apply_dpctl_mod(self, config, "meter-mod cmd=del,meter=0xffffffff")
+        apply_dpctl_mod(self, config, "flow-mod table=10,cmd=add,prio=101 in_port="+str(input_port)+",vlan_vid=0x1064/0x1fff goto:20")
+        apply_dpctl_mod(self, config, "flow-mod table=20,cmd=add,prio=201 vlan_vid=100/0xfff,eth_dst=00:00:00:00:01:00,eth_type=0x0800 goto:29")
+        apply_dpctl_mod(self, config, "group-mod cmd=add,type=ind,group=0xC8000"+str(output_port)+" group=any,port=any,weight=0 output="+str(output_port))
+        apply_dpctl_mod(self, config, "group-mod cmd=add,type=ind,group=0x22000002 group=any,port=any,weight=0 set_field=eth_src=00:00:00:00:02:00,set_field=eth_dst=00:00:00:00:02:01,set_field=vlan_vid=200,group=0xC8000"+str(output_port))
+        apply_dpctl_mod(self, config, "flow-mod table=29,cmd=add,prio=291 eth_type=0x800,ip_src=10.0.0.1,ip_proto=6,tcp_src=2000 write:set_field=ip_src:100.0.0.1,set_field=tcp_src:5000 goto:30")
+        apply_dpctl_mod(self, config, "flow-mod table=30,cmd=add,prio=301 eth_type=0x0800,ip_dst=200.0.0.1/255.255.255.0 write:group=0x22000002 goto:60")
+
+        input_pkt = simple_packet(
+                '00 00 00 00 01 00 00 00 00 00 02 00 81 00 00 64 '
+                '08 00 45 00 00 2e 04 d2 00 00 7f 06 64 f6 0a 00 '
+                '00 01 c8 00 00 01 07 d0 0b 0c 00 01 f7 fa 00 00 '
+                '00 00 50 00 04 00 cf 04 00 00 00 00 00 00 00 00')
+
+        output_pkt = simple_packet(
+                '00 00 00 00 02 01 00 00 00 00 02 00 81 00 00 c8 '
+                '08 00 45 00 00 2e 04 d2 00 00 7e 06 0b f6 64 00 '
+                '00 01 c8 00 00 01 13 88 0b 0c 00 01 f7 fa 00 00 '
+                '00 00 50 00 04 00 69 4c 00 00 00 00 00 00 00 00')
+
+        self.dataplane.send(input_port, str(input_pkt))
+        verify_packet(self, str(output_pkt), output_port)
+
+
+class snat_vrf(base_tests.SimpleDataPlane):
+    """
+    [SNAT VRF]
+      SNAT (outbound) with specified VRF
+
+    Inject  eth 1/1 DA000000000100, SA000000000101, Tag 100, SIP 10.0.0.1, DIP 200.0.0.01, Sport 2000, Dport 2828
+    Output  eth 1/3 DA000000000200, SA000000000201, Tag 200, SIP 100.0.0.1, DIP 200.0.0.01, Sport 5000, Dport 2828
+
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=10,cmd=add,prio=101 in_port=1,vlan_vid=0x1064/0x1fff goto:20 apply:set_field=ofdpa_vrf:3
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=10,cmd=add,prio=101 in_port=1,vlan_vid=0x10c8/0x1fff goto:20 apply:set_field=ofdpa_vrf:3
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=20,cmd=add,prio=201 vlan_vid=100/0xfff,eth_dst=00:00:00:00:01:00,eth_type=0x0800 goto:29
+    ./dpctl tcp:192.168.1.1:6633 group-mod cmd=add,type=ind,group=0xC80003 group=any,port=any,weight=0 output=3
+    ./dpctl tcp:192.168.1.1:6633 group-mod cmd=add,type=ind,group=0x22000002 group=any,port=any,weight=0 set_field=eth_src=00:00:00:00:02:00,set_field=eth_dst=00:00:00:00:02:01,set_field=vlan_vid=200,group=0xC80003
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=29,cmd=add,prio=291 eth_type=0x800,ip_src=10.0.0.1,ip_proto=6,tcp_src=2000,ofdpa_vrf=3 write:set_field=ip_src:100.0.0.1,set_field=tcp_src:5000 goto:30
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=30,cmd=add,prio=301 eth_type=0x0800,ip_dst=200.0.0.1/255.255.255.0,ofdpa_vrf=3 write:group=0x22000002 goto:60
+    """
+    def runTest(self):
+        delete_all_flows(self.controller)
+        delete_all_groups(self.controller)
+
+        test_ports = sorted(config["port_map"].keys())
+
+        input_port = test_ports[0]
+        output_port = test_ports[1]
+
+        apply_dpctl_mod(self, config, "meter-mod cmd=del,meter=0xffffffff")
+        apply_dpctl_mod(self, config, "flow-mod table=10,cmd=add,prio=101 in_port="+str(input_port)+",vlan_vid=0x1064/0x1fff goto:20 apply:set_field=ofdpa_vrf:3")
+        apply_dpctl_mod(self, config, "flow-mod table=10,cmd=add,prio=101 in_port="+str(input_port)+",vlan_vid=0x10c8/0x1fff goto:20 apply:set_field=ofdpa_vrf:3")
+        apply_dpctl_mod(self, config, "flow-mod table=20,cmd=add,prio=201 vlan_vid=100/0xfff,eth_dst=00:00:00:00:01:00,eth_type=0x0800 goto:29")
+        apply_dpctl_mod(self, config, "group-mod cmd=add,type=ind,group=0xC8000"+str(output_port)+" group=any,port=any,weight=0 output="+str(output_port))
+        apply_dpctl_mod(self, config, "group-mod cmd=add,type=ind,group=0x22000002 group=any,port=any,weight=0 set_field=eth_src=00:00:00:00:02:00,set_field=eth_dst=00:00:00:00:02:01,set_field=vlan_vid=200,group=0xC8000"+str(output_port))
+        apply_dpctl_mod(self, config, "flow-mod table=29,cmd=add,prio=291 eth_type=0x800,ip_src=10.0.0.1,ip_proto=6,tcp_src=2000,ofdpa_vrf=3 write:set_field=ip_src:100.0.0.1,set_field=tcp_src:5000 goto:30")
+        apply_dpctl_mod(self, config, "flow-mod table=30,cmd=add,prio=301 eth_type=0x0800,ip_dst=200.0.0.1/255.255.255.0,ofdpa_vrf=3 write:group=0x22000002 goto:60")
+
+        input_pkt = simple_packet(
+                '00 00 00 00 01 00 00 00 00 00 02 00 81 00 00 64 '
+                '08 00 45 00 00 2e 04 d2 00 00 7f 06 64 f6 0a 00 '
+                '00 01 c8 00 00 01 07 d0 0b 0c 00 01 f7 fa 00 00 '
+                '00 00 50 00 04 00 cf 04 00 00 00 00 00 00 00 00')
+
+        output_pkt = simple_packet(
+                '00 00 00 00 02 01 00 00 00 00 02 00 81 00 00 c8 '
+                '08 00 45 00 00 2e 04 d2 00 00 7e 06 0b f6 64 00 '
+                '00 01 c8 00 00 01 13 88 0b 0c 00 01 f7 fa 00 00 '
+                '00 00 50 00 04 00 69 4c 00 00 00 00 00 00 00 00')
+
+        self.dataplane.send(input_port, str(input_pkt))
+        verify_packet(self, str(output_pkt), output_port)
+
+"""
+currently this case will fail, due to packet rx src IP problem
+"""
+class snat_ecmp(base_tests.SimpleDataPlane):
+    """
+    [SNAT ECMP]
+      SNAT (outbound) with ECMP
+
+    Inject  eth 1/1 DA000000000100, SA000000000101, Tag 100, SIP 10.0.0.1, DIP 200.0.0.01, Sport 2000, Dport 2828 [increase DIP]
+    Output  eth 1/3 DA000000000200, SA000000000201, Tag 200, SIP 100.0.0.1, DIP 200.0.0.X, Sport 5000, Dport 2828
+    Output  eth 1/5 DA000000000500, SA000000000501, Tag 5, SIP 100.0.0.1, DIP 200.0.0.X, Sport 5000, Dport 2828
+
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=10,cmd=add,prio=101 in_port=1,vlan_vid=0x1064/0x1fff goto:20
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=20,cmd=add,prio=201 vlan_vid=100/0xfff,eth_dst=00:00:00:00:01:00,eth_type=0x0800 goto:29
+    ./dpctl tcp:192.168.1.1:6633 group-mod cmd=add,type=ind,group=0xC80003 group=any,port=any,weight=0 output=3
+    ./dpctl tcp:192.168.1.1:6633 group-mod cmd=add,type=ind,group=0x22000002 group=any,port=any,weight=0 set_field=eth_src=00:00:00:00:02:00,set_field=eth_dst=00:00:00:00:02:01,set_field=vlan_vid=200,group=0xC80003
+    ./dpctl tcp:192.168.1.1:6633 group-mod cmd=add,type=ind,group=0x50005 group=any,port=any,weight=0 output=5
+    ./dpctl tcp:192.168.1.1:6633 group-mod cmd=add,type=ind,group=0x22000005 group=any,port=any,weight=0 set_field=eth_src=00:00:00:00:05:00,set_field=eth_dst=00:00:00:00:05:01,set_field=vlan_vid=5,group=0x50005
+    ./dpctl tcp:192.168.1.1:6633 group-mod cmd=add,type=sel,group=0x71000001 group=any,port=any,weight=0 group=0x22000002 group=any,port=any,weight=0 group=0x22000005
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=29,cmd=add,prio=291 eth_type=0x800,ip_src=10.0.0.1,ip_proto=6,tcp_src=2000 write:set_field=ip_src:100.0.0.1,set_field=tcp_src:5000 goto:30
+    ./dpctl tcp:192.168.1.1:6633 flow-mod table=30,cmd=add,prio=301 eth_type=0x0800,ip_dst=200.0.0.1/255.255.255.0 write:group=0x71000001 goto:60
+    """
+    def runTest(self):
+        delete_all_flows(self.controller)
+        delete_all_groups(self.controller)
+
+        test_ports = sorted(config["port_map"].keys())
+
+        input_port = test_ports[0]
+        output_port = test_ports[1]
+        output_port2 = test_ports[2]
+
+        apply_dpctl_mod(self, config, "meter-mod cmd=del,meter=0xffffffff")
+        apply_dpctl_mod(self, config, "flow-mod table=10,cmd=add,prio=101 in_port="+str(input_port)+",vlan_vid=0x1064/0x1fff goto:20")
+        apply_dpctl_mod(self, config, "flow-mod table=20,cmd=add,prio=201 vlan_vid=100/0xfff,eth_dst=00:00:00:00:01:00,eth_type=0x0800 goto:29")
+        apply_dpctl_mod(self, config, "group-mod cmd=add,type=ind,group=0xC8000"+str(output_port)+" group=any,port=any,weight=0 output="+str(output_port))
+        apply_dpctl_mod(self, config, "group-mod cmd=add,type=ind,group=0x22000002 group=any,port=any,weight=0 set_field=eth_src=00:00:00:00:02:00,set_field=eth_dst=00:00:00:00:02:01,set_field=vlan_vid=200,group=0xC8000"+str(output_port))
+        apply_dpctl_mod(self, config, "group-mod cmd=add,type=ind,group=0x5000"+str(output_port2)+" group=any,port=any,weight=0 output="+str(output_port2))
+        apply_dpctl_mod(self, config, "group-mod cmd=add,type=ind,group=0x22000005 group=any,port=any,weight=0 set_field=eth_src=00:00:00:00:05:00,set_field=eth_dst=00:00:00:00:05:01,set_field=vlan_vid=5,group=0x5000"+str(output_port))
+        apply_dpctl_mod(self, config, "group-mod cmd=add,type=sel,group=0x71000001 group=any,port=any,weight=0 group=0x22000002 group=any,port=any,weight=0 group=0x22000005")
+        apply_dpctl_mod(self, config, "flow-mod table=29,cmd=add,prio=291 eth_type=0x800,ip_src=10.0.0.1,ip_proto=6,tcp_src=2000 write:set_field=ip_src:100.0.0.1,set_field=tcp_src:5000 goto:30")
+        apply_dpctl_mod(self, config, "flow-mod table=30,cmd=add,prio=301 eth_type=0x0800,ip_dst=200.0.0.1/255.255.255.0 write:group=0x71000001 goto:60")
+
+        #increased DIP
+        input_pkt = simple_packet(
+                '00 00 00 00 01 00 00 00 00 00 02 00 81 00 00 64 '
+                '08 00 45 00 00 2e 04 d2 00 00 7f 06 64 f6 0a 00 '
+                '00 01 c8 00 00 01 07 d0 0b 0c 00 01 f7 fa 00 00 '
+                '00 00 50 00 04 00 cf 04 00 00 00 00 00 00 00 00')
+
+        #rnadom DIP
+        output_pkt = simple_packet(
+                '00 00 00 00 02 01 00 00 00 00 02 00 81 00 00 c8 '
+                '08 00 45 00 00 2e 04 d2 00 00 7e 06 0b e8 64 00 '
+                '00 01 c8 00 00 0f 13 88 0b 0c 00 01 f7 fa 00 00 '
+                '00 00 50 00 04 00 69 3e 00 00 00 00 00 00 00 00')
+
+        #rnadom DIP
+        output_pkt2 = simple_packet(
+                '00 00 00 00 05 01 00 00 00 00 05 00 81 00 00 05 '
+                '08 00 45 00 00 2e 04 d2 00 00 7e 06 0b f4 64 00 '
+                '00 01 c8 00 00 03 13 88 0b 0c 00 01 f7 fa 00 00 '
+                '00 00 50 00 04 00 69 4a 00 00 00 00 00 00 00 00')
+
+        self.dataplane.send(input_port, str(input_pkt))
+        verify_packet(self, str(output_pkt), output_port)
+        self.dataplane.send(input_port, str(input_pkt))
+        verify_packet(self, str(output_pkt2), output_port2)