[V1] test_plans: add l3fwd_lpm_ipv4 test plan

diff --git a/test_plans/index.rst b/test_plans/index.rst
index 570e1c35..b4efd39a 100644
--- a/test_plans/index.rst
+++ b/test_plans/index.rst
@@ -96,6 +96,7 @@  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_lpm_ipv4_test_plan.rst
     l3fwd_func_test_plan
     l3fwdacl_test_plan
     large_vf_test_plan
diff --git a/test_plans/l3fwd_lpm_ipv4_test_plan.rst b/test_plans/l3fwd_lpm_ipv4_test_plan.rst
new file mode 100644
index 00000000..42784dd0
--- /dev/null
+++ b/test_plans/l3fwd_lpm_ipv4_test_plan.rst
@@ -0,0 +1,148 @@ 
+.. SPDX-License-Identifier: BSD-3-Clause
+   Copyright(c) 2022 Intel Corporation
+
+================================================
+L3 forwarding test in LPM mode with IPV4 packets
+================================================
+
+This document provides the plan for testing the performance of Intel Ethernet Controller.
+The Layer-3 Forwarding  performance results are produced using ``l3fwd`` application.
+For detail test plan, please refer to ``l3fwd_test_plan.rst``.
+
+Prerequisites
+=============
+
+Topology
+-----------
+It requires at least 1 port connected traffic generator::
+        Port0 --- TG0
+
+2 ports::
+        Port0 --- TG0
+        Port1 --- TG1
+
+4 ports::
+        Port0 --- TG0
+        Port1 --- TG1
+        Port2 --- TG2
+        Port3 --- TG3
+
+Hardware
+--------
+This suite focus on l3fwd application, so any standard Ethernet Network Adapter is qualified.
+
+Software
+--------
+dpdk: git clone http://dpdk.org/git/dpdk
+trex: git clone http://trex-tgn.cisco.com/trex/release/v2.93.tar.gz
+
+
+Test Case
+=========
+The test case check the throughput result with lpm mode and ipv4, in the case,
+we will send the bi-direction flows with line rate, then we can check the
+passthrough rate.
+
+The l3fwd application has a number of command line options, here list the key options will be tested::
+
+    ./dpdk-l3fwd [EAL options] -- -p PORTMASK
+                             [--force-max-simd-bitwidth=max-simd-bitwidth]
+                             --config(port,queue,lcore)[,(port,queue,lcore)]
+                             [--rx-queue-size NPKTS]
+                             [--tx-queue-size NPKTS]
+                             [--parse-ptype]
+                             [-L]|[-E]
+                             ...
+    Note:
+        --force-max-simd-bitwidth: This setting is used to determine the vector path for component selection.
+                                   And the default is avx2.
+        --rx-queue-size: Rx queue size in decimal and default is 1024.
+        --tx-queue-size: Tx queue size in decimal and default is 1024.
+        --parse-ptype: Optional, set to use software to analyze packet type.
+                       Without this option, hardware will check the packet type.
+        [-L]|[-E]: L3fwd uses the parameters "-L" and "-E" to correspond to LPM and EM modes respectively.
+                   And the default is LPM mode.
+
+Common Steps
+------------
+1. Bind tested ports to vfio-pci::
+
+    <dpdk_dir>#./usertools/dpdk-devbind.py -s
+    0000:17:00.0 'Device 1592' if=ens5f0 drv=ice unused=vfio-pci
+    <dpdk_dir>#./usertools/dpdk-devbind.py -b vfio-pci <pci device id>
+    <dpdk_dir>#./usertools/dpdk-devbind.py -b vfio-pci 0000:17:00.0
+
+2. Configure traffic generator to send traffic
+
+    Routing table for IPv4 packets
+      - In LPM mode, the LPM table used for packet routing is:
+
+    +-------+-----------------------+
+    |   #   | LPM prefix (IP/length)|
+    +=======+=======================+
+    |   0   |      198.18.0.0/24    |
+    +-------+-----------------------+
+    |   1   |      198.18.1.0/24    |
+    +-------+-----------------------+
+    |   2   |      198.18.2.0/24    |
+    +-------+-----------------------+
+    |   3   |      198.18.3.0/24    |
+    +-------+-----------------------+
+
+    The flows need to be configured and started by the traffic generator:
+      - IPv4 packets
+
+    +------+---------+------------+---------+
+    | Flow | Traffic | IPv4       | IPv4    |
+    |      | Gen.    | Dst.       | Src.    |
+    |      | Port    | Address    | Address |
+    +======+=========+============+=========+
+    |   1  |   TG0   | 198.18.1.1 |  Any Ip |
+    +------+---------+------------+---------+
+    |   2  |   TG1   | 198.18.0.1 |  Any Ip |
+    +------+---------+------------+---------+
+    |   3  |   TG2   | 198.18.3.1 |  Any Ip |
+    +------+---------+------------+---------+
+    |   4  |   TG3   | 198.18.2.1 |  Any Ip |
+    +------+---------+------------+---------+
+
+    Set the packet length : 64 bytes-1518 bytes
+    The IPV4 Src Address increase with the num 1024.
+
+3. Test result table
+
+    +-----------+------------+-------------+---------+
+    |  Fwd_core | Frame Size |  Throughput |   Rate  |
+    +===========+============+=============+=========+
+    |  1C/1T    |    64      |  xxxxx Mpps |   xxx % |
+    +-----------+------------+-------------+---------+
+    |  1C/1T    |   ...      |  xxxxx Mpps |   xxx % |
+    +-----------+------------+-------------+---------+
+    |  2C/2T    |    64      |  xxxxx Mpps |   xxx % |
+    +-----------+------------+-------------+---------+
+    |  2C/2T    |    ...     |  xxxxx Mpps |   xxx % |
+    +-----------+------------+-------------+---------+
+    |  4C/4T    |    64      |  xxxxx Mpps |   xxx % |
+    +-----------+------------+-------------+---------+
+    |  4C/4T    |    ...     |  xxxxx Mpps |   xxx % |
+    +-----------+------------+-------------+---------+
+    |  8C/8T    |    64      |  xxxxx Mpps |   xxx % |
+    +-----------+------------+-------------+---------+
+    |  8C/8T    |    ...     |  xxxxx Mpps |   xxx % |
+    +-----------+------------+-------------+---------+
+
+
+Test Case: test_perf_throughput_ipv4_lpm
+----------------------------------------
+
+1. Bind PF ports to dpdk driver as common step 1.
+
+2. Launch l3fwd::
+
+     <build_dir>/examples/dpdk-l3fwd -l 5-8 -n 8 --force-max-simd-bitwidth=512 \
+     -- -p 0x1 --config "(0,0,5),(0,1,6),(0,2,7),(0,3,8)" --rx-queue-size 1024 \
+     --tx-queue-size 1024
+
+3. Configure traffic generator to send traffic as common step 2.
+
+4. Record Test results as common step 3.