diff --git a/test_plans/index.rst b/test_plans/index.rst
index f8118d14..35143fb2 100644
--- a/test_plans/index.rst
+++ b/test_plans/index.rst
@@ -114,6 +114,7 @@ The following are the test plans for the DPDK DTS automated test system.
     l2fwd_test_plan
     l2tp_esp_coverage_test_plan
     l3fwd_test_plan
+    l3fwd_func_test_plan
     l3fwdacl_test_plan
     large_vf_test_plan
     link_flowctrl_test_plan
diff --git a/test_plans/l3fwd_func_test_plan.rst b/test_plans/l3fwd_func_test_plan.rst
new file mode 100644
index 00000000..e69e44a5
--- /dev/null
+++ b/test_plans/l3fwd_func_test_plan.rst
@@ -0,0 +1,237 @@
+.. SPDX-License-Identifier: BSD-3-Clause
+   Copyright 2022 Intel Corporation
+
+==========================
+L3fwd Functional test plan
+==========================
+
+Description
+===========
+
+The L3fwd application is a simple example of packet processing using
+DPDK to demonstrate usage of poll and event mode packet I/O mechanism.
+The application performs L3 forwarding. For more, please consult
+`Data Plane Development Kit L3 Forwarding Sample Application
+<https://doc.dpdk.org/guides/sample_app_ug/l3_forward.html>`_.
+
+Prerequisites
+=============
+Topology
+--------
+It requires at least 1 port connected traffic generator::
+
+	Port0 --- TG0
+
+2 ports is better::
+
+	Port0 --- TG0
+	Port1 --- TG1
+
+
+Hardware
+--------
+This suite focus on l3fwd application, so any standard Ethernet Network Adapter is qualified.
+
+Software
+--------
+* dpdk l3fwd application
+* scapy to send packets from traffic generator, which is usually another Ethernet Network Adapter.
+
+General Set Up
+--------------
+Here assume that 0000:18:00.0 and 0000:18:00.1 are DUT ports, and ens785f0 and ens785f1 are tester interfaces.
+
+#. Build DPDK and l3fwd application::
+
+   <dpdk dir># meson -Dexamples=l3fwd <dpdk build dir>
+   <dpdk dir># ninja -C <dpdk build dir>
+
+#. Get the DUT ports and tester interfaces::
+
+    <dpdk dir># ./usertools/dpdk-devbind.py -s
+    0000:18:00.0 'Ethernet Controller E810-C for QSFP 1592' if=ens785f0 drv=ice unused=vfio-pci
+    0000:18:00.1 'Ethernet Controller E810-C for QSFP 1592' if=ens785f1 drv=ice unused=vfio-pci
+
+#. Bind the DUT ports to vfio-pci::
+
+    <dpdk dir># ./usertools/dpdk-devbind.py -b vfio-pci 0000:18:00.0 0000:18:00.1
+    0000:18:00.0 'Ethernet Controller E810-C for QSFP 1592' drv=vfio-pci unused=ice
+    0000:18:00.1 'Ethernet Controller E810-C for QSFP 1592' drv=vfio-pci unused=ice
+
+
+Test Case
+=========
+
+The l3fwd application has a number of command line options, here list the key options will be tested::
+
+    ./dpdk-l3fwd [EAL options] -- -p PORTMASK
+                             --rule_ipv4=FILE
+                             --rule_ipv6=FILE
+                             [-P]
+                             [--lookup LOOKUP_METHOD]
+                             --config(port,queue,lcore)[,(port,queue,lcore)]
+                             [--rx-queue-size NPKTS]
+                             [--tx-queue-size NPKTS]
+                             ...
+
+Go through every options is not efficiency, therefore 3 combinations are created to make sure every key options are tested.
+
+.. table::
+
+   +-------------+--------------------+-------------+--------------+-------------+---------------+
+   | Port number | Rx queues per port | Rule source | Lookup       | Promise     | Queue size    |
+   +=============+====================+=============+==============+=============+===============+
+   |     1       |   1                | default     | default(lpm) | default(on) | default(1024) |
+   +-------------+--------------------+-------------+--------------+-------------+---------------+
+   |     1       |   4                | file        | em           |     enable  | 2048          |
+   +-------------+--------------------+-------------+--------------+-------------+---------------+
+   |     2       |   4                | file        | em           |     enable  | 2048          |
+   +-------------+--------------------+-------------+--------------+-------------+---------------+
+
+The table shows:
+
+* No. 1 covers most default options with least port, it only requires 1 port.
+* No. 2 covers the other situations against to default, it also requires 1 port.
+* No. 3 is almost same as No.2 except it requires 2 ports.
+
+.. note::
+
+    * If there is only 1 port, choose test case 1 and 2 to test.
+    * If there are 2 ports, choose test case 1 and 3 to test.
+
+Packet pattern:
+
+* IPv4::
+
+	[Ether(dst="<dtsmac>", src="<srcmac>")/IP(src="1.2.3.4",dst="<match>")/Raw("x"*80)]
+
+* IPv6::
+
+	[Ether(dst="<dtsmac>", src="<srcmac>")/IPv6(src="fe80::b696:91ff:fe9f:64b9",dst="<match>")/Raw("x"*80)]
+
+.. note::
+
+	20 packets with increased src_ip are used in every examination.
+
+
+Test Case 1: 1 port 1 queue with default setting
+------------------------------------------------
+
+#. Launch l3fwd::
+
+   ./<build_dir>/examples/dpdk-l3fwd -l <lcore> -n 4 -- -p 0x1 --config="(0,0,<lcore>)"
+   ./build/examples/dpdk-l3fwd -l 1 -n 4 -- -p 0x1 --config="(0,0,1)" --eth-dest=0,b4:96:91:9f:64:b9
+
+   Here list some output logs which helps you understand l3fwd.
+
+   *  The DUT port is 0000:18:00.0::
+
+         EAL: Probe PCI driver: net_ice (8086:1592) device: 0000:18:00.0 (socket 0)
+
+   *  The lookup method is lpm and use default table. DUT mac address is 40:A6:B7:7B:3F:00, the egress packets dst mac is 02:00:00:00:00:00::
+
+         Neither LPM, EM, or FIB selected, defaulting to LPM
+         L3FWD: Missing 1 or more rule files, using default instead
+
+   *  Every port creates 1 rx queue and 1 tx queue::
+
+         Creating queues: nb_rxq=1 nb_txq=1
+         Address:40:A6:B7:7B:3F:00, Destination:02:00:00:00:00:00
+
+   *  Route rules::
+
+         LPM: Adding route 198.18.0.0 / 24 (0) [0000:18:00.0]
+         LPM: Adding route 2001:200:: / 64 (0) [0000:18:00.0]
+
+   *  RX PATH "AVX2 OFFLOAD Vector Rx" is used::
+
+         ice_set_rx_function(): Using AVX2 OFFLOAD Vector Rx (port 0)
+
+   *  lcore 1 is used to polling port 0 rx queue 0::
+
+         L3FWD:  -- lcoreid=1 portid=0 rxqueueid=0
+
+   *  Link status, Packets sending to DUT have to wait port `link up`::
+
+         Port 0 Link up at 100 Gbps FDX Autoneg
+
+#. run tcpdump to capture packets on tester interface::
+
+    tcpdump -i <TG interface> -vvv -Q in -e
+    tcpdump -i ens2f0 -vvv -Q in -e
+
+#. TG send both 20 ipv4 and ipv6 packets which match the route table::
+
+   >>> sendp([Ether(dst="<matched mac>", src="<src mac>")/IP(src="<src ip>",dst="<198.168.0.x>")/Raw("x"*80)], iface="<tester tx port interface>")
+   >>> sendp([Ether(dst="<matched mac>", src="<src mac>")/IPv6(src="<src ip>",dst="<2001:200::x>")/Raw("x"*80)], iface="<tester tx port interface>")
+
+   >>> sendp([Ether(dst="40:A6:B7:7B:3F:00", src="b4:96:91:9f:64:b9")/IP(src="1.2.3.4",dst="198.168.0.1")/Raw("x"*80)], iface="ens2f0")
+   >>> sendp([Ether(dst="40:A6:B7:7B:3F:00", src="b4:96:91:9f:64:b9")/IPv6(src="fe80::b696:91ff:fe9f:64b9",dst="2001:200::")/Raw("x"*80)], iface="ens2f0")
+
+#. Check if the packets forwarded to TG, get the packets informartion from tcpdump output::
+
+    07:44:32.770005 40:a6:b7:7b:3f:00 (oui Unknown) > 02:00:00:00:00:00 (oui Unknown), ethertype IPv4 (0x0800), length 114: (tos 0x0, ttl 63, id 1, offset 0, flags [none], proto Options (0), length 100)
+        1.2.3.4 > 198.168.0.1:  hopopt 80
+    07:53:08.206002 40:a6:b7:7b:3f:00 (oui Unknown) > 02:00:00:00:00:00 (oui Unknown), ethertype IPv6 (0x86dd), length 134: (hlim 64, next-header unknown (59) payload length: 80) test > 2001:200::: no next header
+
+   `Pass Criteria`: Both the IPv4 and IPv6 packets are matched with the the transmitted packets.
+
+Test Case 2: 1 port 4 queue with non-default setting
+----------------------------------------------------
+
+#. Launch l3fwd::
+
+   ./<build_dir>/examples/dpdk-l3fwd -l <lcore0,lcore1> -n 4 -- -p 0x1 --config="(0,0,<lcore0>),(0,1,<lcore0>),(0,2,<lcore1>),(0,3,<lcore1>)" -P --rule_ipv4="./examples/l3fwd/em_default_v4.cfg" --rule_ipv6="./examples/l3fwd/em_default_v6.cfg" --lookup=em --rx-queue-size=2048 --tx-queue-size=2048
+   ./build/examples/dpdk-l3fwd -l 1,2 -n 4 -- -p 0x1 --config="(0,0,1),(0,1,1),(0,2,2),(0,3,2)" -P --rule_ipv4="./examples/l3fwd/em_default_v4.cfg" --rule_ipv6="./examples/l3fwd/em_default_v6.cfg" --lookup=em --rx-queue-size=2048 --tx-queue-size=2048 --parse-ptype
+
+   "--parse-ptype" is optional, add it if DUT do not support to parse RTE_PTYPE_L3_IPV4_EXT and RTE_PTYPE_L3_IPV6_EXT.
+
+   *  Route rules::
+
+         EM: Adding route 198.18.0.0, 198.18.0.1, 9, 9, 17 (0) [0000:18:00.0]
+
+#. run tcpdump to capture packets on tester interface::
+
+    tcpdump -i <TG interface> -vvv -Q in -e
+    tcpdump -i ens2f0 -vvv -Q in -e
+
+#. TG send both ipv4 and ipv6 packets which match the route table and distributed to all queues::
+
+   >>> sendp([Ether(dst="<unmatched mac>", src="<src mac>")/IP(src="<src ip>",dst="<198.168.0.x>")/Raw("x"*80)], iface="<tester tx port interface>")
+   >>> sendp([Ether(dst="<unmatched mac>", src="<src mac>")/IPv6(src="<src ip>",dst="<match table>")/Raw("x"*80)], iface="<tester tx port interface>")
+
+#. Check if the packets forwarded to TG, get the packets informartion from tcpdump output::
+
+    07:44:32.770005 40:a6:b7:7b:3f:00 (oui Unknown) > 02:00:00:00:00:00 (oui Unknown), ethertype IPv4 (0x0800), length 114: (tos 0x0, ttl 63, id 1, offset 0, flags [none], proto Options (0), length 100)
+        1.2.3.4 > 198.168.0.1:  hopopt 80
+    07:53:08.206002 40:a6:b7:7b:3f:00 (oui Unknown) > 02:00:00:00:00:00 (oui Unknown), ethertype IPv6 (0x86dd), length 134: (hlim 64, next-header unknown (59) payload length: 80) test > 2001:200::: no next header
+
+   `Pass Criteria`: Both the IPv4 and IPv6 packets are matched with the the transmitted packets.
+
+
+Test Case 3: 2 ports 4 queues with non-default setting
+------------------------------------------------------
+
+#. Launch l3fwd::
+
+    ./<build_dir>/examples/dpdk-l3fwd -l <lcore0,lcore1> -n 4 -- -p 0x3 --config="(0,0,<lcore0>),(0,1,<lcore0>),(0,2,<lcore1>, ,(0,3,<lcore1>),(1,0,<lcore0>),(1,1,<lcore0>),(1,2,<lcore1>, ,(1,3,<lcore1>)" -P --rule_ipv4="rule_ipv4.cfg" --rule_ipv6="rule_ipv6.cfg" --lookup=em --rx-queue-size=2048 --tx-queue-size=2048
+
+#. run tcpdump to capture packets on tester interfaces::
+
+    tcpdump -i <tester tx Port0 interface> -vvv -Q in -e
+    tcpdump -i <tester tx Port1 interface> -vvv -Q in -e
+
+#. All TG 2 ports send both ipv4 and ipv6 packets which match the route table and distributed to all queues::
+
+   >>> sendp([Ether(dst="<unmatched mac>", src="<src mac>")/IP(src="<src ip>",dst="<198.168.0.x>")/Raw("x"*80)], iface="<tester tx Port0 interface>")
+   >>> sendp([Ether(dst="<unmatched mac>", src="<src mac>")/IPv6(src="<src ip>",dst="<match table>")/Raw("x"*80)], iface="<tester tx port0 interface>")
+   >>> sendp([Ether(dst="<unmatched mac>", src="<src mac>")/IP(src="<src ip>",dst="<198.168.0.x>")/Raw("x"*80)], iface="<tester tx Port1 interface>")
+   >>> sendp([Ether(dst="<unmatched mac>", src="<src mac>")/IPv6(src="<src ip>",dst="<match table>")/Raw("x"*80)], iface="<tester tx port1 interface>")
+
+#. Check if the packets forwarded to TG, run tcpdump to capture packets on tester interface::
+
+    07:44:32.770005 40:a6:b7:7b:3f:00 (oui Unknown) > 02:00:00:00:00:00 (oui Unknown), ethertype IPv4 (0x0800), length 114: (tos 0x0, ttl 63, id 1, offset 0, flags [none], proto Options (0), length 100)
+        1.2.3.4 > 198.168.0.1:  hopopt 80
+    07:53:08.206002 40:a6:b7:7b:3f:00 (oui Unknown) > 02:00:00:00:00:00 (oui Unknown), ethertype IPv6 (0x86dd), length 134: (hlim 64, next-header unknown (59) payload length: 80) test > 2001:200::: no next header
+
+   `Pass Criteria`: Both the IPv4 and IPv6 packets are matched with the the transmitted packets.
