diff --git a/test_plans/vm2vm_virtio_net_perf_test_plan.rst b/test_plans/vm2vm_virtio_net_perf_test_plan.rst
index 21661b4b..a8eb487f 100644
--- a/test_plans/vm2vm_virtio_net_perf_test_plan.rst
+++ b/test_plans/vm2vm_virtio_net_perf_test_plan.rst
@@ -9,8 +9,8 @@ Description
 ===========
 
 This test plan test several features in VM2VM topo:
-1. Check Vhost tx offload (TSO and UFO) function by verifying the TSO/cksum in the TCP/IP stack and UFO/cksum
-in the UDP/IP stack with vm2vm split ring and packed ring vhost-user/virtio-net mergeable path.
+1. Check Vhost tx offload (TSO) function by verifying the TSO/cksum in the TCP/IP stack and UFO/cksum
+in the IP stack with vm2vm split ring and packed ring vhost-user/virtio-net mergeable path.
 2. Check the payload of large packet (larger than 1MB) is valid after forwarding packets with vm2vm split ring
 and packed ring vhost-user/virtio-net mergeable and non-mergeable path.
 Note: 
@@ -80,76 +80,19 @@ Test Case 1: VM2VM split ring vhost-user/virtio-net test with tcp traffic
     Port 0 should have tx packets above 1522
     Port 1 should have rx packets above 1522
 
-Test Case 2: VM2VM split ring vhost-user/virtio-net test with udp traffic
-=========================================================================
-
-1. Launch the Vhost sample by below commands::
-
-    rm -rf vhost-net*
-    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0xF0000000 -n 4 --no-pci --file-prefix=vhost \
-    --vdev 'net_vhost0,iface=vhost-net0,queues=1,tso=1' \
-    --vdev 'net_vhost1,iface=vhost-net1,queues=1,tso=1' \
-    -- -i --nb-cores=1 --txd=1024 --rxd=1024
-    testpmd>start
-
-2. Launch VM1 and VM2::
-
-    qemu-system-x86_64 -name vm1 -enable-kvm -cpu host -smp 1 -m 4096 \
-    -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
-    -numa node,memdev=mem -mem-prealloc -drive file=/home/osimg/ubuntu20-04.img  \
-    -chardev socket,path=/tmp/vm2_qga0.sock,server,nowait,id=vm2_qga0 -device virtio-serial \
-    -device virtserialport,chardev=vm2_qga0,name=org.qemu.guest_agent.2 -daemonize \
-    -monitor unix:/tmp/vm2_monitor.sock,server,nowait -device e1000,netdev=nttsip1 \
-    -netdev user,id=nttsip1,hostfwd=tcp:127.0.0.1:6002-:22 \
-    -chardev socket,id=char0,path=./vhost-net0 \
-    -netdev type=vhost-user,id=netdev0,chardev=char0,vhostforce \
-    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:01,disable-modern=false,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,guest_ufo=on,host_ufo=on -vnc :10
-
-    qemu-system-x86_64 -name vm2 -enable-kvm -cpu host -smp 1 -m 4096 \
-    -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
-    -numa node,memdev=mem -mem-prealloc -drive file=/home/osimg/ubuntu20-04-2.img  \
-    -chardev socket,path=/tmp/vm2_qga0.sock,server,nowait,id=vm2_qga0 -device virtio-serial \
-    -device virtserialport,chardev=vm2_qga0,name=org.qemu.guest_agent.2 -daemonize \
-    -monitor unix:/tmp/vm2_monitor.sock,server,nowait -device e1000,netdev=nttsip1 \
-    -netdev user,id=nttsip1,hostfwd=tcp:127.0.0.1:6003-:22 \
-    -chardev socket,id=char0,path=./vhost-net1 \
-    -netdev type=vhost-user,id=netdev0,chardev=char0,vhostforce \
-    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:02,disable-modern=false,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,guest_ufo=on,host_ufo=on -vnc :12
-
-3. On VM1, set virtio device IP and run arp protocol::
-
-    ifconfig ens3 1.1.1.2
-    arp -s 1.1.1.8 52:54:00:00:00:02
-
-4. On VM2, set virtio device IP and run arp protocol::
-
-    ifconfig ens3 1.1.1.8
-    arp -s 1.1.1.2 52:54:00:00:00:01
-
-5. Check the iperf performance between two VMs by below commands::
-
-    Under VM1, run: `iperf -s -u -i 1`
-    Under VM2, run: `iperf -c 1.1.1.2 -i 1 -t 30 -P 4 -u -b 1G -l 9000`
-
-6. Check 2VMs can receive and send big packets to each other::
-
-    testpmd>show port xstats all
-    Port 0 should have tx packets above 1522
-    Port 1 should have rx packets above 1522
-
-Test Case 3: Check split ring virtio-net device capability
+Test Case 2: Check split ring virtio-net device capability
 ==========================================================
 
 1. Launch the Vhost sample by below commands::
 
     rm -rf vhost-net*
-    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0xF0000000 -n 4 --no-pci --file-prefix=vhost \
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 2-4 -n 4 --no-pci --file-prefix=vhost \
     --vdev 'net_vhost0,iface=vhost-net0,queues=1,tso=1' \
     --vdev 'net_vhost1,iface=vhost-net1,queues=1,tso=1' \
     -- -i --nb-cores=2 --txd=1024 --rxd=1024
     testpmd>start
 
-2. Launch VM1 and VM2,set TSO and UFO on in qemu command::
+2. Launch VM1 and VM2,set TSO on in qemu command::
 
     qemu-system-x86_64 -name vm1 -enable-kvm -cpu host -smp 1 -m 4096 \
     -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
@@ -160,7 +103,7 @@ Test Case 3: Check split ring virtio-net device capability
     -netdev user,id=nttsip1,hostfwd=tcp:127.0.0.1:6002-:22 \
     -chardev socket,id=char0,path=./vhost-net0 \
     -netdev type=vhost-user,id=netdev0,chardev=char0,vhostforce \
-    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:01,disable-modern=false,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,guest_ufo=on,host_ufo=on -vnc :10
+    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:01,disable-modern=false,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on -vnc :10
 
     qemu-system-x86_64 -name vm2 -enable-kvm -cpu host -smp 1 -m 4096 \
     -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
@@ -171,23 +114,21 @@ Test Case 3: Check split ring virtio-net device capability
     -netdev user,id=nttsip1,hostfwd=tcp:127.0.0.1:6003-:22 \
     -chardev socket,id=char0,path=./vhost-net1 \
     -netdev type=vhost-user,id=netdev0,chardev=char0,vhostforce \
-    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:02,disable-modern=false,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,guest_ufo=on,host_ufo=on -vnc :12
+    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:02,disable-modern=false,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on -vnc :12
 
-3. Check UFO and TSO offload status on for the Virtio-net driver on VM1 and VM2::
+3. Check TSO offload status on for the Virtio-net driver on VM1 and VM2::
 
     Under VM1, run: `run ethtool -k ens3`
-    udp-fragmentation-offload: on
     tx-tcp-segmentation: on
     tx-tcp-ecn-segmentation: on
     tx-tcp6-segmentation: on
 
     Under VM2, run: `run ethtool -k ens3`
-    udp-fragmentation-offload: on
     tx-tcp-segmentation: on
     tx-tcp-ecn-segmentation: on
     tx-tcp6-segmentation: on
 
-Test Case 4: VM2VM packed ring vhost-user/virtio-net test with tcp traffic
+Test Case 3: VM2VM packed ring vhost-user/virtio-net test with tcp traffic
 ==========================================================================
 
 1. Launch the Vhost sample by below commands::
@@ -244,76 +185,19 @@ Test Case 4: VM2VM packed ring vhost-user/virtio-net test with tcp traffic
     Port 0 should have tx packets above 1522
     Port 1 should have rx packets above 1522
 
-Test Case 5: VM2VM packed ring vhost-user/virtio-net test with udp traffic
-==========================================================================
-
-1. Launch the Vhost sample by below commands::
-
-    rm -rf vhost-net*
-    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0xF0000000 -n 4 --no-pci --file-prefix=vhost \
-    --vdev 'net_vhost0,iface=vhost-net0,queues=1,tso=1' \
-    --vdev 'net_vhost1,iface=vhost-net1,queues=1,tso=1' \
-    -- -i --nb-cores=2 --txd=1024 --rxd=1024
-    testpmd>start
-
-2. Launch VM1 and VM2 with qemu::
-
-    qemu-system-x86_64 -name vm1 -enable-kvm -cpu host -smp 40 -m 4096 \
-    -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
-    -numa node,memdev=mem -mem-prealloc -drive file=/home/osimg/ubuntu1910.img  \
-    -chardev socket,path=/tmp/vm2_qga0.sock,server,nowait,id=vm2_qga0 -device virtio-serial \
-    -device virtserialport,chardev=vm2_qga0,name=org.qemu.guest_agent.2 -daemonize \
-    -monitor unix:/tmp/vm2_monitor.sock,server,nowait -device e1000,netdev=nttsip1 \
-    -netdev user,id=nttsip1,hostfwd=tcp:127.0.0.1:6002-:22 \
-    -chardev socket,id=char0,path=./vhost-net0 \
-    -netdev type=vhost-user,id=netdev0,chardev=char0,vhostforce \
-    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:01,disable-modern=false,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,packed=on -vnc :10
-
-    qemu-system-x86_64 -name vm2 -enable-kvm -cpu host -smp 1 -m 4096 \
-    -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
-    -numa node,memdev=mem -mem-prealloc -drive file=/home/osimg/ubuntu20-04-2.img  \
-    -chardev socket,path=/tmp/vm2_qga0.sock,server,nowait,id=vm2_qga0 -device virtio-serial \
-    -device virtserialport,chardev=vm2_qga0,name=org.qemu.guest_agent.2 -daemonize \
-    -monitor unix:/tmp/vm2_monitor.sock,server,nowait -device e1000,netdev=nttsip1 \
-    -netdev user,id=nttsip1,hostfwd=tcp:127.0.0.1:6003-:22 \
-    -chardev socket,id=char0,path=./vhost-net1 \
-    -netdev type=vhost-user,id=netdev0,chardev=char0,vhostforce \
-    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:02,disable-modern=false,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,packed=on -vnc :12
-
-3. On VM1, set virtio device IP and run arp protocol::
-
-    ifconfig ens3 1.1.1.2
-    arp -s 1.1.1.8 52:54:00:00:00:02
-
-4. On VM2, set virtio device IP and run arp protocol::
-
-    ifconfig ens3 1.1.1.8
-    arp -s 1.1.1.2 52:54:00:00:00:01
-
-5. Check the iperf performance between two VMs by below commands::
-
-    Under VM1, run: `iperf -s -u -i 1`
-    Under VM2, run: `iperf -c 1.1.1.2 -i 1 -t 30 -P 4 -u -b 1G -l 9000`
-
-6. Check 2VMs can receive and send big packets to each other::
-
-    testpmd>show port xstats all
-    Port 0 should have tx packets above 1522
-    Port 1 should have rx packets above 1522
-
-Test Case 6: Check packed ring virtio-net device capability
-============================================================
+Test Case 4: Check packed ring virtio-net device capability
+===========================================================
 
 1. Launch the Vhost sample by below commands::
 
     rm -rf vhost-net*
-    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0xF0000000 -n 4 --no-pci --file-prefix=vhost \
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 2-4 -n 4 --no-pci --file-prefix=vhost \
     --vdev 'net_vhost0,iface=vhost-net0,queues=1,tso=1' \
     --vdev 'net_vhost1,iface=vhost-net1,queues=1,tso=1' \
     -- -i --nb-cores=2 --txd=1024 --rxd=1024
     testpmd>start
 
-2. Launch VM1 and VM2 with qemu,set TSO and UFO on in qemu command::
+2. Launch VM1 and VM2 with qemu,set TSO on in qemu command::
 
     qemu-system-x86_64 -name vm1 -enable-kvm -cpu host -smp 1 -m 4096 \
     -object memory-backend-file,id=mem,size=4096M,mem-path=/mnt/huge,share=on \
@@ -335,18 +219,16 @@ Test Case 6: Check packed ring virtio-net device capability
     -netdev user,id=nttsip1,hostfwd=tcp:127.0.0.1:6003-:22 \
     -chardev socket,id=char0,path=./vhost-net1 \
     -netdev type=vhost-user,id=netdev0,chardev=char0,vhostforce \
-    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:02,disable-modern=false,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,host_ufo=on,guest_ufo=on,guest_ecn=on,packed=on -vnc :12
+    -device virtio-net-pci,netdev=netdev0,mac=52:54:00:00:00:02,disable-modern=false,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,packed=on -vnc :12
 
 3. Check UFO and TSO offload status on for the Virtio-net driver on VM1 and VM2::
 
     Under VM1, run: `run ethtool -k ens3`
-    udp-fragmentation-offload: on
     tx-tcp-segmentation: on
     tx-tcp-ecn-segmentation: on
     tx-tcp6-segmentation: on
 
     Under VM2, run: `run ethtool -k ens3`
-    udp-fragmentation-offload: on
     tx-tcp-segmentation: on
     tx-tcp-ecn-segmentation: on
     tx-tcp6-segmentation: on
