CSIT-324 L2dp - Bridge domain - baseline vhost-user

- Add test cases for vhost-user testing with
  NIC(X520)-to-VM(testpmd,virtio)

Change-Id: Id0e508d50288d89b39bc5c321eeab0c908f3e2ba
Signed-off-by: pmikus <pmikus@cisco.com>

3 files changed, 680 insertions, 0 deletions

diff --git a/docs/tag_documentation.rst b/docs/tag_documentation.rst
index c4c0511247..2531c0242f 100644
--- a/docs/tag_documentation.rst
+++ b/docs/tag_documentation.rst
@@ -81,6 +81,9 @@ Performance testing TAGs
 PERFTEST
     All performance test cases.
 
+PERFTEST_VHOST
+    All performance test cases that include testing of VHOST with VM.
+
 PERFTEST_SHORT
     Performance of DUT should pass specific value. Each test case run is
     executed for 10 seconds.
diff --git a/resources/libraries/robot/performance.robot b/resources/libraries/robot/performance.robot
index 6849e9820a..365d44de1e 100644
--- a/resources/libraries/robot/performance.robot
+++ b/resources/libraries/robot/performance.robot
@@ -691,6 +691,39 @@
 | | Vpp l2bd forwarding setup | ${dut2} | ${dut2_if1} | ${dut2_if2}
 | | All Vpp Interfaces Ready Wait | ${nodes}
 
+| L2 bridge domains with Vhost-User initialized in a 3-node circular topology
+| | [Documentation]
+| | ... | Create two Vhost-User interfaces on all defined VPP nodes. Add each
+| | ... | Vhost-User interface into L2 bridge domains with learning enabled
+| | ... | with physical inteface.
+| | ...
+| | ... | *Arguments:*
+| | ... | - bd_id1 - Bridge domain ID. Type: integer
+| | ... | - bd_id2 - Bridge domain ID. Type: integer
+| | ... | - sock1 - Sock path for first Vhost-User interface. Type: string
+| | ... | - sock2 - Sock path for second Vhost-User interface. Type: string
+| | ...
+| | ... | *Example:*
+| | ...
+| | ... | \| L2 bridge domains with Vhost-User initialized in a 3-node \
+| | ... |    circular topology \| 1 \| 2 \| /tmp/sock1 \| /tmp/sock2 \|
+| | [Arguments] | ${bd_id1} | ${bd_id2} | ${sock1} | ${sock2}
+| | VPP Vhost interfaces for L2BD forwarding are setup | ${dut1}
+| | ...                                                | ${sock1}
+| | ...                                                | ${sock2}
+| | Interface is added to bridge domain | ${dut1} | ${dut1_if1} | ${bd_id1}
+| | Interface is added to bridge domain | ${dut1} | ${vhost_if1} | ${bd_id1}
+| | Interface is added to bridge domain | ${dut1} | ${dut1_if2} | ${bd_id2}
+| | Interface is added to bridge domain | ${dut1} | ${vhost_if2} | ${bd_id2}
+| | VPP Vhost interfaces for L2BD forwarding are setup | ${dut2}
+| | ...                                                | ${sock1}
+| | ...                                                | ${sock2}
+| | Interface is added to bridge domain | ${dut2} | ${dut2_if1} | ${bd_id1}
+| | Interface is added to bridge domain | ${dut2} | ${vhost_if1} | ${bd_id1}
+| | Interface is added to bridge domain | ${dut2} | ${dut2_if2} | ${bd_id2}
+| | Interface is added to bridge domain | ${dut2} | ${vhost_if2} | ${bd_id2}
+| | All Vpp Interfaces Ready Wait | ${nodes}
+
 2-node Performance Suite Setup with DUT's NIC model
 | | [Documentation]
 | | ... | Suite preparation phase that setup default startup configuration of
diff --git a/tests/perf/Long_Bridge_Domain_Vhost_Intel-X520-DA2.robot b/tests/perf/Long_Bridge_Domain_Vhost_Intel-X520-DA2.robot
new file mode 100644
index 0000000000..4f50a69778
--- /dev/null
+++ b/tests/perf/Long_Bridge_Domain_Vhost_Intel-X520-DA2.robot
@@ -0,0 +1,644 @@
+# Copyright (c) 2016 Cisco and/or its affiliates.
+# 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.
+
+*** Settings ***
+| Resource | resources/libraries/robot/performance.robot
+| Library | resources.libraries.python.QemuUtils
+| Force Tags | 3_NODE_SINGLE_LINK_TOPO | PERFTEST | HW_ENV | PERFTEST_LONG
+| ...        | PERFTEST_VHOST | NIC_Intel-X520-DA2
+| Suite Setup | Run Keywords | 3-node Performance Suite Setup with DUT's NIC model
+| ... | L2 | Intel-X520-DA2
+| ...         | AND          | Kill QEMU on all DUTs
+| ...         | AND          | Build QEMU on all DUTs
+| Suite Teardown | 3-node Performance Suite Teardown
+| Test Setup | Setup all DUTs before test
+| Test Teardown | Run Keywords | Remove startup configuration of VPP from all DUTs
+| ...           | AND          | Guest VM with dpdk-testpmd Teardown | ${dut1}
+| ...                          | ${dut1_vm_refs}
+| ...           | AND          | Guest VM with dpdk-testpmd Teardown | ${dut2}
+| ...                          | ${dut2_vm_refs}
+| Documentation | *RFC2544: Pkt throughput L2BD test cases with vhost*
+| ...
+| ... | *[Top] Network Topologies:* TG-DUT1-DUT2-TG 3-node circular topology
+| ... | with single links between nodes.
+| ... | *[Enc] Packet Encapsulations:* Eth-IPv4 for L2 switching of IPv4.
+| ... | *[Cfg] DUT configuration:* DUT1 and DUT2 are configured with L2 bridge-
+| ... | domain and MAC learning enabled. Qemu Guest is connected to VPP via
+| ... | vhost-user interfaces. Guest is running DPDK testpmd interconnecting
+| ... | vhost-user interfaces using 3 cores pinned to cpus 5,6,7 and 2048M
+| ... | memory. Testpmd is using socket-mem=1024M (512x2M hugepages), 3 cores
+| ... | (1 main core and 2 cores dedicated for io), forwarding mode is set to
+| ... | io, rxq/txq=2048, burst=64. DUT1, DUT2 are tested with 2p10GE NIC X520
+| ... | Niantic by Intel.
+| ... | *[Ver] TG verification:* TG finds and reports throughput NDR (Non Drop
+| ... | Rate) with zero packet loss tolerance or throughput PDR (Partial Drop
+| ... | Rate) with non-zero packet loss tolerance (LT) expressed in percentage
+| ... | of packets transmitted. NDR and PDR are discovered for different
+| ... | Ethernet L2 frame sizes using either binary search or linear search
+| ... | algorithms with configured starting rate and final step that determines
+| ... | throughput measurement resolution. Test packets are generated by TG on
+| ... | links to DUTs. TG traffic profile contains two L3 flow-groups
+| ... | (flow-group per direction, 253 flows per flow-group) with all packets
+| ... | containing Ethernet header, IPv4 header with IP protocol=61 and static
+| ... | payload. MAC addresses are matching MAC addresses of the TG node
+| ... | interfaces.
+| ... | *[Ref] Applicable standard specifications:* RFC2544.
+
+*** Variables ***
+| ${bd_id1}= | 1
+| ${bd_id2}= | 2
+| ${sock1}= | /tmp/sock-1-${bd_id1}
+| ${sock2}= | /tmp/sock-1-${bd_id2}
+
+*** Test Cases ***
+| TC01: 64B NDR binary search - DUT L2BD-VHOST - 1thread 1core 1rxq
+| | [Documentation]
+| | ... | [Cfg] DUT runs L2BD switching config with 1 thread, 1 phy core, \
+| | ... | 1 receive queue per NIC port. [Ver] Find NDR for 64 Byte frames
+| | ... | using binary search start at 10GE linerate, step 10kpps.
+| | [Tags] | 1_THREAD_NOHTT_RXQUEUES_1 | SINGLE_THREAD | NDR | SKIP_PATCH
+| | ${framesize}= | Set Variable | 64
+| | ${min_rate}= | Set Variable | 10000
+| | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_64B}
+| | ${binary_min}= | Set Variable | ${min_rate}
+| | ${binary_max}= | Set Variable | ${max_rate}
+| | ${threshold}= | Set Variable | ${min_rate}
+| | ${dut1_vm_refs}= | Create Dictionary
+| | ${dut2_vm_refs}= | Create Dictionary
+| | Given Add '1' worker threads and rxqueues '1' without HTT to all DUTs
+| | And   Add PCI devices to DUTs from 3-node single link topology
+| | And   Add No Multi Seg to all DUTs
+| | And   Apply startup configuration on all VPP DUTs
+| | When  L2 bridge domains with Vhost-User initialized in a 3-node circular topology
+| | ...   | ${bd_id1} | ${bd_id2} | ${sock1} | ${sock2}
+| | ${vm1}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut1} | ${sock1} | ${sock2} | DUT1_VM1
+| | Set To Dictionary | ${dut1_vm_refs} | DUT1_VM1 | ${vm1}
+| | ${vm2}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut2} | ${sock1} | ${sock2} | DUT2_VM1
+| | Set To Dictionary | ${dut2_vm_refs} | DUT2_VM1 | ${vm2}
+| | Then Find NDR using binary search and pps | ${framesize} | ${binary_min}
+| | ...                                       | ${binary_max} | 3-node-bridge
+| | ...                                       | ${min_rate} | ${max_rate}
+| | ...                                       | ${threshold}
+
+| TC02: 64B PDR binary search - DUT L2BD-VHOST - 1thread 1core 1rxq
+| | [Documentation]
+| | ... | [Cfg] DUT runs L2BD switching config with 1 thread, 1 phy core, \
+| | ... | 1 receive queue per NIC port. [Ver] Find PDR for 64 Byte frames
+| | ... | using binary search start at 10GE linerate, step 10kpps, LT=0.5%.
+| | [Tags] | 1_THREAD_NOHTT_RXQUEUES_1 | SINGLE_THREAD | PDR
+| | ${framesize}= | Set Variable | 64
+| | ${min_rate}= | Set Variable | 10000
+| | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_64B}
+| | ${binary_min}= | Set Variable | ${min_rate}
+| | ${binary_max}= | Set Variable | ${max_rate}
+| | ${threshold}= | Set Variable | ${min_rate}
+| | ${dut1_vm_refs}= | Create Dictionary
+| | ${dut2_vm_refs}= | Create Dictionary
+| | Given Add '1' worker threads and rxqueues '1' without HTT to all DUTs
+| | And   Add PCI devices to DUTs from 3-node single link topology
+| | And   Add No Multi Seg to all DUTs
+| | And   Apply startup configuration on all VPP DUTs
+| | When  L2 bridge domains with Vhost-User initialized in a 3-node circular topology
+| | ...   | ${bd_id1} | ${bd_id2} | ${sock1} | ${sock2}
+| | ${vm1}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut1} | ${sock1} | ${sock2} | DUT1_VM1
+| | Set To Dictionary | ${dut1_vm_refs} | DUT1_VM1 | ${vm1}
+| | ${vm2}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut2} | ${sock1} | ${sock2} | DUT2_VM1
+| | Set To Dictionary | ${dut2_vm_refs} | DUT2_VM1 | ${vm2}
+| | Then Find PDR using binary search and pps | ${framesize} | ${binary_min}
+| | ...                                       | ${binary_max} | 3-node-bridge
+| | ...                                       | ${min_rate} | ${max_rate}
+| | ...                                       | ${threshold}
+| | ...                                       | ${glob_loss_acceptance}
+| | ...                                       | ${glob_loss_acceptance_type}
+
+| TC03: 1518B NDR binary search - DUT L2BD-VHOST - 1thread 1core 1rxq
+| | [Documentation]
+| | ... | [Cfg] DUT runs L2BD switching config with 1 thread, 1 phy core, \
+| | ... | 1 receive queue per NIC port. [Ver] Find NDR for 1518 Byte frames
+| | ... | using binary search start at 10GE linerate, step 10kpps.
+| | [Tags] | 1_THREAD_NOHTT_RXQUEUES_1 | SINGLE_THREAD | NDR | SKIP_PATCH
+| | ${framesize}= | Set Variable | 1518
+| | ${min_rate}= | Set Variable | 10000
+| | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_1518B}
+| | ${binary_min}= | Set Variable | ${min_rate}
+| | ${binary_max}= | Set Variable | ${max_rate}
+| | ${threshold}= | Set Variable | ${min_rate}
+| | ${dut1_vm_refs}= | Create Dictionary
+| | ${dut2_vm_refs}= | Create Dictionary
+| | Given Add '1' worker threads and rxqueues '1' without HTT to all DUTs
+| | And   Add PCI devices to DUTs from 3-node single link topology
+| | And   Add No Multi Seg to all DUTs
+| | And   Apply startup configuration on all VPP DUTs
+| | When  L2 bridge domains with Vhost-User initialized in a 3-node circular topology
+| | ...   | ${bd_id1} | ${bd_id2} | ${sock1} | ${sock2}
+| | ${vm1}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut1} | ${sock1} | ${sock2} | DUT1_VM1
+| | Set To Dictionary | ${dut1_vm_refs} | DUT1_VM1 | ${vm1}
+| | ${vm2}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut2} | ${sock1} | ${sock2} | DUT2_VM1
+| | Set To Dictionary | ${dut2_vm_refs} | DUT2_VM1 | ${vm2}
+| | Then Find NDR using binary search and pps | ${framesize} | ${binary_min}
+| | ...                                       | ${binary_max} | 3-node-bridge
+| | ...                                       | ${min_rate} | ${max_rate}
+| | ...                                       | ${threshold}
+
+| TC04: 1518B PDR binary search - DUT L2BD-VHOST - 1thread 1core 1rxq
+| | [Documentation]
+| | ... | [Cfg] DUT runs L2BD switching config with 1 thread, 1 phy core, \
+| | ... | 1 receive queue per NIC port. [Ver] Find PDR for 1518 Byte frames
+| | ... | using binary search start at 10GE linerate, step 10kpps, LT=0.5%.
+| | [Tags] | 1_THREAD_NOHTT_RXQUEUES_1 | SINGLE_THREAD | PDR
+| | ${framesize}= | Set Variable | 1518
+| | ${min_rate}= | Set Variable | 10000
+| | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_1518B}
+| | ${binary_min}= | Set Variable | ${min_rate}
+| | ${binary_max}= | Set Variable | ${max_rate}
+| | ${threshold}= | Set Variable | ${min_rate}
+| | ${dut1_vm_refs}= | Create Dictionary
+| | ${dut2_vm_refs}= | Create Dictionary
+| | Given Add '1' worker threads and rxqueues '1' without HTT to all DUTs
+| | And   Add PCI devices to DUTs from 3-node single link topology
+| | And   Add No Multi Seg to all DUTs
+| | And   Apply startup configuration on all VPP DUTs
+| | When  L2 bridge domains with Vhost-User initialized in a 3-node circular topology
+| | ...   | ${bd_id1} | ${bd_id2} | ${sock1} | ${sock2}
+| | ${vm1}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut1} | ${sock1} | ${sock2} | DUT1_VM1
+| | Set To Dictionary | ${dut1_vm_refs} | DUT1_VM1 | ${vm1}
+| | ${vm2}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut2} | ${sock1} | ${sock2} | DUT2_VM1
+| | Set To Dictionary | ${dut2_vm_refs} | DUT2_VM1 | ${vm2}
+| | Then Find PDR using binary search and pps | ${framesize} | ${binary_min}
+| | ...                                       | ${binary_max} | 3-node-bridge
+| | ...                                       | ${min_rate} | ${max_rate}
+| | ...                                       | ${threshold}
+| | ...                                       | ${glob_loss_acceptance}
+| | ...                                       | ${glob_loss_acceptance_type}
+
+| TC05: IMIX_v4_1 NDR binary search - DUT L2BD-VHOST - 1thread 1core 1rxq
+| | [Documentation]
+| | ... | [Cfg] DUT runs L2BD switching config with 1 thread, 1 phy core, \
+| | ... | 1 receive queue per NIC port. [Ver] Find NDR for IMIX_v4_1 frame size
+| | ... | using binary search start at 10GE linerate, step 5kpps.
+| | ... | IMIX_v4_1 = (28x64B;16x570B;4x1518B)
+| | [Tags] | 1_THREAD_NOHTT_RXQUEUES_1 | SINGLE_THREAD | NDR | SKIP_PATCH
+| | ${framesize}= | Set Variable | IMIX_v4_1
+| | ${min_rate}= | Set Variable | 5000
+| | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_IMIX_v4_1}
+| | ${binary_min}= | Set Variable | ${min_rate}
+| | ${binary_max}= | Set Variable | ${max_rate}
+| | ${threshold}= | Set Variable | ${min_rate}
+| | ${dut1_vm_refs}= | Create Dictionary
+| | ${dut2_vm_refs}= | Create Dictionary
+| | Given Add '1' worker threads and rxqueues '1' without HTT to all DUTs
+| | And   Add PCI devices to DUTs from 3-node single link topology
+| | And   Add No Multi Seg to all DUTs
+| | And   Apply startup configuration on all VPP DUTs
+| | When  L2 bridge domains with Vhost-User initialized in a 3-node circular topology
+| | ...   | ${bd_id1} | ${bd_id2} | ${sock1} | ${sock2}
+| | ${vm1}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut1} | ${sock1} | ${sock2} | DUT1_VM1
+| | Set To Dictionary | ${dut1_vm_refs} | DUT1_VM1 | ${vm1}
+| | ${vm2}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut2} | ${sock1} | ${sock2} | DUT2_VM1
+| | Set To Dictionary | ${dut2_vm_refs} | DUT2_VM1 | ${vm2}
+| | Then Find NDR using binary search and pps | ${framesize} | ${binary_min}
+| | ...                                       | ${binary_max} | 3-node-bridge
+| | ...                                       | ${min_rate} | ${max_rate}
+| | ...                                       | ${threshold}
+
+| TC06: IMIX_v4_1 PDR binary search - DUT L2BD-VHOST - 1thread 1core 1rxq
+| | [Documentation]
+| | ... | [Cfg] DUT runs L2BD switching config with 1 thread, 1 phy core, \
+| | ... | 1 receive queue per NIC port. [Ver] Find PDR for IMIX_v4_1 frame size
+| | ... | using binary search start at 10GE linerate, step 5kpps, LT=0.5%.
+| | ... | IMIX_v4_1 = (28x64B;16x570B;4x1518B)
+| | [Tags] | 1_THREAD_NOHTT_RXQUEUES_1 | SINGLE_THREAD | PDR
+| | ${framesize}= | Set Variable | IMIX_v4_1
+| | ${min_rate}= | Set Variable | 5000
+| | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_IMIX_v4_1}
+| | ${binary_min}= | Set Variable | ${min_rate}
+| | ${binary_max}= | Set Variable | ${max_rate}
+| | ${threshold}= | Set Variable | ${min_rate}
+| | ${dut1_vm_refs}= | Create Dictionary
+| | ${dut2_vm_refs}= | Create Dictionary
+| | Given Add '1' worker threads and rxqueues '1' without HTT to all DUTs
+| | And   Add PCI devices to DUTs from 3-node single link topology
+| | And   Apply startup configuration on all VPP DUTs
+| | When  L2 bridge domains with Vhost-User initialized in a 3-node circular topology
+| | ...   | ${bd_id1} | ${bd_id2} | ${sock1} | ${sock2}
+| | ${vm1}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut1} | ${sock1} | ${sock2} | DUT1_VM1
+| | Set To Dictionary | ${dut1_vm_refs} | DUT1_VM1 | ${vm1}
+| | ${vm2}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut2} | ${sock1} | ${sock2} | DUT2_VM1
+| | Set To Dictionary | ${dut2_vm_refs} | DUT2_VM1 | ${vm2}
+| | Then Find PDR using binary search and pps | ${framesize} | ${binary_min}
+| | ...                                       | ${binary_max} | 3-node-bridge
+| | ...                                       | ${min_rate} | ${max_rate}
+| | ...                                       | ${threshold}
+| | ...                                       | ${glob_loss_acceptance}
+| | ...                                       | ${glob_loss_acceptance_type}
+
+| TC07: 64B NDR binary search - DUT L2BD-VHOST - 2threads 2cores 1rxq
+| | [Documentation]
+| | ... | [Cfg] DUT runs L2BD switching config with 2 threads, 2 phy cores, \
+| | ... | 1 receive queue per NIC port. [Ver] Find NDR for 64 Byte frames
+| | ... | using binary search start at 10GE linerate, step 10kpps.
+| | [Tags] | 2_THREAD_NOHTT_RXQUEUES_1 | MULTI_THREAD | NDR | SKIP_PATCH
+| | ${framesize}= | Set Variable | 64
+| | ${min_rate}= | Set Variable | 10000
+| | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_64B}
+| | ${binary_min}= | Set Variable | ${min_rate}
+| | ${binary_max}= | Set Variable | ${max_rate}
+| | ${threshold}= | Set Variable | ${min_rate}
+| | ${dut1_vm_refs}= | Create Dictionary
+| | ${dut2_vm_refs}= | Create Dictionary
+| | Given Add '2' worker threads and rxqueues '1' without HTT to all DUTs
+| | And   Add PCI devices to DUTs from 3-node single link topology
+| | And   Add No Multi Seg to all DUTs
+| | And   Apply startup configuration on all VPP DUTs
+| | When  L2 bridge domains with Vhost-User initialized in a 3-node circular topology
+| | ...   | ${bd_id1} | ${bd_id2} | ${sock1} | ${sock2}
+| | ${vm1}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut1} | ${sock1} | ${sock2} | DUT1_VM1
+| | Set To Dictionary | ${dut1_vm_refs} | DUT1_VM1 | ${vm1}
+| | ${vm2}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut2} | ${sock1} | ${sock2} | DUT2_VM1
+| | Set To Dictionary | ${dut2_vm_refs} | DUT2_VM1 | ${vm2}
+| | Then Find NDR using binary search and pps | ${framesize} | ${binary_min}
+| | ...                                       | ${binary_max} | 3-node-bridge
+| | ...                                       | ${min_rate} | ${max_rate}
+| | ...                                       | ${threshold}
+
+| TC08: 64B PDR binary search - DUT L2BD-VHOST - 2threads 2cores 1rxq
+| | [Documentation]
+| | ... | [Cfg] DUT runs L2BD switching config with 2 threads, 2 phy cores, \
+| | ... | 1 receive queue per NIC port. [Ver] Find PDR for 64 Byte frames
+| | ... | using binary search start at 10GE linerate, step 10kpps, LT=0.5%.
+| | [Tags] | 2_THREAD_NOHTT_RXQUEUES_1 | MULTI_THREAD | PDR
+| | ${framesize}= | Set Variable | 64
+| | ${min_rate}= | Set Variable | 10000
+| | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_64B}
+| | ${binary_min}= | Set Variable | ${min_rate}
+| | ${binary_max}= | Set Variable | ${max_rate}
+| | ${threshold}= | Set Variable | ${min_rate}
+| | ${dut1_vm_refs}= | Create Dictionary
+| | ${dut2_vm_refs}= | Create Dictionary
+| | Given Add '2' worker threads and rxqueues '1' without HTT to all DUTs
+| | And   Add PCI devices to DUTs from 3-node single link topology
+| | And   Add No Multi Seg to all DUTs
+| | And   Apply startup configuration on all VPP DUTs
+| | When  L2 bridge domains with Vhost-User initialized in a 3-node circular topology
+| | ...   | ${bd_id1} | ${bd_id2} | ${sock1} | ${sock2}
+| | ${vm1}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut1} | ${sock1} | ${sock2} | DUT1_VM1
+| | Set To Dictionary | ${dut1_vm_refs} | DUT1_VM1 | ${vm1}
+| | ${vm2}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut2} | ${sock1} | ${sock2} | DUT2_VM1
+| | Set To Dictionary | ${dut2_vm_refs} | DUT2_VM1 | ${vm2}
+| | Then Find PDR using binary search and pps | ${framesize} | ${binary_min}
+| | ...                                       | ${binary_max} | 3-node-bridge
+| | ...                                       | ${min_rate} | ${max_rate}
+| | ...                                       | ${threshold}
+| | ...                                       | ${glob_loss_acceptance}
+| | ...                                       | ${glob_loss_acceptance_type}
+
+| TC09: 1518B NDR binary search - DUT L2BD-VHOST - 2threads 2cores 1rxq
+| | [Documentation]
+| | ... | [Cfg] DUT runs L2BD switching config with 2 threads, 2 phy cores, \
+| | ... | 1 receive queue per NIC port. [Ver] Find NDR for 1518 Byte frames
+| | ... | using binary search start at 10GE linerate, step 10kpps.
+| | [Tags] | 2_THREAD_NOHTT_RXQUEUES_1 | MULTI_THREAD | NDR | SKIP_PATCH
+| | ${framesize}= | Set Variable | 1518
+| | ${min_rate}= | Set Variable | 10000
+| | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_1518B}
+| | ${binary_min}= | Set Variable | ${min_rate}
+| | ${binary_max}= | Set Variable | ${max_rate}
+| | ${threshold}= | Set Variable | ${min_rate}
+| | ${dut1_vm_refs}= | Create Dictionary
+| | ${dut2_vm_refs}= | Create Dictionary
+| | Given Add '2' worker threads and rxqueues '1' without HTT to all DUTs
+| | And   Add PCI devices to DUTs from 3-node single link topology
+| | And   Add No Multi Seg to all DUTs
+| | And   Apply startup configuration on all VPP DUTs
+| | When  L2 bridge domains with Vhost-User initialized in a 3-node circular topology
+| | ...   | ${bd_id1} | ${bd_id2} | ${sock1} | ${sock2}
+| | ${vm1}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut1} | ${sock1} | ${sock2} | DUT1_VM1
+| | Set To Dictionary | ${dut1_vm_refs} | DUT1_VM1 | ${vm1}
+| | ${vm2}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut2} | ${sock1} | ${sock2} | DUT2_VM1
+| | Set To Dictionary | ${dut2_vm_refs} | DUT2_VM1 | ${vm2}
+| | Then Find NDR using binary search and pps | ${framesize} | ${binary_min}
+| | ...                                       | ${binary_max} | 3-node-bridge
+| | ...                                       | ${min_rate} | ${max_rate}
+| | ...                                       | ${threshold}
+
+| TC10: 1518B PDR binary search - DUT L2BD-VHOST - 2threads 2cores 1rxq
+| | [Documentation]
+| | ... | [Cfg] DUT runs L2BD switching config with 2 threads, 2 phy cores, \
+| | ... | 1 receive queue per NIC port. [Ver] Find PDR for 1518 Byte frames
+| | ... | using binary search start at 10GE linerate, step 10kpps, LT=0.5%.
+| | [Tags] | 2_THREAD_NOHTT_RXQUEUES_1 | MULTI_THREAD | PDR | SKIP_PATCH
+| | ${framesize}= | Set Variable | 1518
+| | ${min_rate}= | Set Variable | 10000
+| | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_1518B}
+| | ${binary_min}= | Set Variable | ${min_rate}
+| | ${binary_max}= | Set Variable | ${max_rate}
+| | ${threshold}= | Set Variable | ${min_rate}
+| | ${dut1_vm_refs}= | Create Dictionary
+| | ${dut2_vm_refs}= | Create Dictionary
+| | Given Add '2' worker threads and rxqueues '1' without HTT to all DUTs
+| | And   Add PCI devices to DUTs from 3-node single link topology
+| | And   Add No Multi Seg to all DUTs
+| | And   Apply startup configuration on all VPP DUTs
+| | When  L2 bridge domains with Vhost-User initialized in a 3-node circular topology
+| | ...   | ${bd_id1} | ${bd_id2} | ${sock1} | ${sock2}
+| | ${vm1}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut1} | ${sock1} | ${sock2} | DUT1_VM1
+| | Set To Dictionary | ${dut1_vm_refs} | DUT1_VM1 | ${vm1}
+| | ${vm2}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut2} | ${sock1} | ${sock2} | DUT2_VM1
+| | Set To Dictionary | ${dut2_vm_refs} | DUT2_VM1 | ${vm2}
+| | Then Find PDR using binary search and pps | ${framesize} | ${binary_min}
+| | ...                                       | ${binary_max} | 3-node-bridge
+| | ...                                       | ${min_rate} | ${max_rate}
+| | ...                                       | ${threshold}
+| | ...                                       | ${glob_loss_acceptance}
+| | ...                                       | ${glob_loss_acceptance_type}
+
+| TC11: IMIX_v4_1 NDR binary search - DUT L2BD-VHOST - 2threads 2cores 1rxq
+| | [Documentation]
+| | ... | [Cfg] DUT runs L2BD switching config with 2 threads, 2 phy cores, \
+| | ... | 1 receive queue per NIC port. [Ver] Find NDR for IMIX_v4_1 frame size
+| | ... | using binary search start at 10GE linerate, step 5kpps.
+| | ... | IMIX_v4_1 = (28x64B;16x570B;4x1518B)
+| | [Tags] | 2_THREAD_NOHTT_RXQUEUES_1 | MULTI_THREAD | NDR | SKIP_PATCH
+| | ${framesize}= | Set Variable | IMIX_v4_1
+| | ${min_rate}= | Set Variable | 5000
+| | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_IMIX_v4_1}
+| | ${binary_min}= | Set Variable | ${min_rate}
+| | ${binary_max}= | Set Variable | ${max_rate}
+| | ${threshold}= | Set Variable | ${min_rate}
+| | ${dut1_vm_refs}= | Create Dictionary
+| | ${dut2_vm_refs}= | Create Dictionary
+| | Given Add '2' worker threads and rxqueues '1' without HTT to all DUTs
+| | And   Add PCI devices to DUTs from 3-node single link topology
+| | And   Add No Multi Seg to all DUTs
+| | And   Apply startup configuration on all VPP DUTs
+| | When  L2 bridge domains with Vhost-User initialized in a 3-node circular topology
+| | ...   | ${bd_id1} | ${bd_id2} | ${sock1} | ${sock2}
+| | ${vm1}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut1} | ${sock1} | ${sock2} | DUT1_VM1
+| | Set To Dictionary | ${dut1_vm_refs} | DUT1_VM1 | ${vm1}
+| | ${vm2}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut2} | ${sock1} | ${sock2} | DUT2_VM1
+| | Set To Dictionary | ${dut2_vm_refs} | DUT2_VM1 | ${vm2}
+| | Then Find NDR using binary search and pps | ${framesize} | ${binary_min}
+| | ...                                       | ${binary_max} | 3-node-bridge
+| | ...                                       | ${min_rate} | ${max_rate}
+| | ...                                       | ${threshold}
+
+| TC12: IMIX_v4_1 PDR binary search - DUT L2BD-VHOST - 2threads 2cores 1rxq
+| | [Documentation]
+| | ... | [Cfg] DUT runs L2BD switching config with 2 threads, 2 phy cores, \
+| | ... | 1 receive queue per NIC port. [Ver] Find PDR for IMIX_v4_1 frame size
+| | ... | using binary search start at 10GE linerate, step 5kpps, LT=0.5%.
+| | ... | IMIX_v4_1 = (28x64B;16x570B;4x1518B)
+| | [Tags] | 2_THREAD_NOHTT_RXQUEUES_1 | MULTI_THREAD | PDR | SKIP_PATCH
+| | ${framesize}= | Set Variable | IMIX_v4_1
+| | ${min_rate}= | Set Variable | 5000
+| | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_IMIX_v4_1}
+| | ${binary_min}= | Set Variable | ${min_rate}
+| | ${binary_max}= | Set Variable | ${max_rate}
+| | ${threshold}= | Set Variable | ${min_rate}
+| | ${dut1_vm_refs}= | Create Dictionary
+| | ${dut2_vm_refs}= | Create Dictionary
+| | Given Add '2' worker threads and rxqueues '1' without HTT to all DUTs
+| | And   Add PCI devices to DUTs from 3-node single link topology
+| | And   Add No Multi Seg to all DUTs
+| | And   Apply startup configuration on all VPP DUTs
+| | When  L2 bridge domains with Vhost-User initialized in a 3-node circular topology
+| | ...   | ${bd_id1} | ${bd_id2} | ${sock1} | ${sock2}
+| | ${vm1}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut1} | ${sock1} | ${sock2} | DUT1_VM1
+| | Set To Dictionary | ${dut1_vm_refs} | DUT1_VM1 | ${vm1}
+| | ${vm2}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut2} | ${sock1} | ${sock2} | DUT2_VM1
+| | Set To Dictionary | ${dut2_vm_refs} | DUT2_VM1 | ${vm2}
+| | Then Find PDR using binary search and pps | ${framesize} | ${binary_min}
+| | ...                                       | ${binary_max} | 3-node-bridge
+| | ...                                       | ${min_rate} | ${max_rate}
+| | ...                                       | ${threshold}
+| | ...                                       | ${glob_loss_acceptance}
+| | ...                                       | ${glob_loss_acceptance_type}
+
+| TC13: 64B NDR binary search - DUT L2BD-VHOST - 4threads 4cores 2rxq
+| | [Documentation]
+| | ... | [Cfg] DUT runs L2BD switching config with 4 threads, 4 phy cores, \
+| | ... | 2 receive queues per NIC port. [Ver] Find NDR for 64 Byte frames
+| | ... | using binary search start at 10GE linerate, step 10kpps.
+| | [Tags] | 4_THREAD_NOHTT_RXQUEUES_2 | MULTI_THREAD | NDR | SKIP_PATCH
+| | ${framesize}= | Set Variable | 64
+| | ${min_rate}= | Set Variable | 10000
+| | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_64B}
+| | ${binary_min}= | Set Variable | ${min_rate}
+| | ${binary_max}= | Set Variable | ${max_rate}
+| | ${threshold}= | Set Variable | ${min_rate}
+| | ${dut1_vm_refs}= | Create Dictionary
+| | ${dut2_vm_refs}= | Create Dictionary
+| | Given Add '4' worker threads and rxqueues '2' without HTT to all DUTs
+| | And   Add PCI devices to DUTs from 3-node single link topology
+| | And   Add No Multi Seg to all DUTs
+| | And   Apply startup configuration on all VPP DUTs
+| | When  L2 bridge domains with Vhost-User initialized in a 3-node circular topology
+| | ...   | ${bd_id1} | ${bd_id2} | ${sock1} | ${sock2}
+| | ${vm1}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut1} | ${sock1} | ${sock2} | DUT1_VM1
+| | Set To Dictionary | ${dut1_vm_refs} | DUT1_VM1 | ${vm1}
+| | ${vm2}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut2} | ${sock1} | ${sock2} | DUT2_VM1
+| | Set To Dictionary | ${dut2_vm_refs} | DUT2_VM1 | ${vm2}
+| | Then Find NDR using binary search and pps | ${framesize} | ${binary_min}
+| | ...                                       | ${binary_max} | 3-node-bridge
+| | ...                                       | ${min_rate} | ${max_rate}
+| | ...                                       | ${threshold}
+
+| TC14: 64B PDR binary search - DUT L2BD-VHOST - 4threads 4cores 2rxq
+| | [Documentation]
+| | ... | [Cfg] DUT runs L2BD switching config with 4 threads, 4 phy cores, \
+| | ... | 2 receive queues per NIC port. [Ver] Find PDR for 64 Byte frames
+| | ... | using binary search start at 10GE linerate, step 10kpps, LT=0.5%.
+| | [Tags] | 4_THREAD_NOHTT_RXQUEUES_2 | MULTI_THREAD | PDR
+| | ${framesize}= | Set Variable | 64
+| | ${min_rate}= | Set Variable | 10000
+| | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_64B}
+| | ${binary_min}= | Set Variable | ${min_rate}
+| | ${binary_max}= | Set Variable | ${max_rate}
+| | ${threshold}= | Set Variable | ${min_rate}
+| | ${dut1_vm_refs}= | Create Dictionary
+| | ${dut2_vm_refs}= | Create Dictionary
+| | Given Add '4' worker threads and rxqueues '2' without HTT to all DUTs
+| | And   Add PCI devices to DUTs from 3-node single link topology
+| | And   Add No Multi Seg to all DUTs
+| | And   Apply startup configuration on all VPP DUTs
+| | When  L2 bridge domains with Vhost-User initialized in a 3-node circular topology
+| | ...   | ${bd_id1} | ${bd_id2} | ${sock1} | ${sock2}
+| | ${vm1}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut1} | ${sock1} | ${sock2} | DUT1_VM1
+| | Set To Dictionary | ${dut1_vm_refs} | DUT1_VM1 | ${vm1}
+| | ${vm2}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut2} | ${sock1} | ${sock2} | DUT2_VM1
+| | Set To Dictionary | ${dut2_vm_refs} | DUT2_VM1 | ${vm2}
+| | Then Find PDR using binary search and pps | ${framesize} | ${binary_min}
+| | ...                                       | ${binary_max} | 3-node-bridge
+| | ...                                       | ${min_rate} | ${max_rate}
+| | ...                                       | ${threshold}
+| | ...                                       | ${glob_loss_acceptance}
+| | ...                                       | ${glob_loss_acceptance_type}
+
+| TC15: 1518B NDR binary search - DUT L2BD-VHOST - 4threads 4cores 2rxq
+| | [Documentation]
+| | ... | [Cfg] DUT runs L2BD switching config with 4 threads, 4 phy cores, \
+| | ... | 2 receive queues per NIC port. [Ver] Find NDR for 1518 Byte frames
+| | ... | using binary search start at 10GE linerate, step 10kpps.
+| | [Tags] | 4_THREAD_NOHTT_RXQUEUES_2 | MULTI_THREAD | NDR | SKIP_PATCH
+| | ${framesize}= | Set Variable | 1518
+| | ${min_rate}= | Set Variable | 10000
+| | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_1518B}
+| | ${binary_min}= | Set Variable | ${min_rate}
+| | ${binary_max}= | Set Variable | ${max_rate}
+| | ${threshold}= | Set Variable | ${min_rate}
+| | ${dut1_vm_refs}= | Create Dictionary
+| | ${dut2_vm_refs}= | Create Dictionary
+| | Given Add '4' worker threads and rxqueues '2' without HTT to all DUTs
+| | And   Add PCI devices to DUTs from 3-node single link topology
+| | And   Add No Multi Seg to all DUTs
+| | And   Apply startup configuration on all VPP DUTs
+| | When  L2 bridge domains with Vhost-User initialized in a 3-node circular topology
+| | ...   | ${bd_id1} | ${bd_id2} | ${sock1} | ${sock2}
+| | ${vm1}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut1} | ${sock1} | ${sock2} | DUT1_VM1
+| | Set To Dictionary | ${dut1_vm_refs} | DUT1_VM1 | ${vm1}
+| | ${vm2}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut2} | ${sock1} | ${sock2} | DUT2_VM1
+| | Set To Dictionary | ${dut2_vm_refs} | DUT2_VM1 | ${vm2}
+| | Then Find NDR using binary search and pps | ${framesize} | ${binary_min}
+| | ...                                       | ${binary_max} | 3-node-bridge
+| | ...                                       | ${min_rate} | ${max_rate}
+| | ...                                       | ${threshold}
+
+| TC16: 1518B PDR binary search - DUT L2BD-VHOST - 4threads 4cores 2rxq
+| | [Documentation]
+| | ... | [Cfg] DUT runs L2BD switching config with 4 threads, 4 phy cores, \
+| | ... | 2 receive queues per NIC port. [Ver] Find PDR for 1518 Byte frames
+| | ... | using binary search start at 10GE linerate, step 10kpps, LT=0.5%.
+| | [Tags] | 4_THREAD_NOHTT_RXQUEUES_2 | MULTI_THREAD | PDR | SKIP_PATCH
+| | ${framesize}= | Set Variable | 1518
+| | ${min_rate}= | Set Variable | 10000
+| | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_1518B}
+| | ${binary_min}= | Set Variable | ${min_rate}
+| | ${binary_max}= | Set Variable | ${max_rate}
+| | ${threshold}= | Set Variable | ${min_rate}
+| | ${dut1_vm_refs}= | Create Dictionary
+| | ${dut2_vm_refs}= | Create Dictionary
+| | Given Add '4' worker threads and rxqueues '2' without HTT to all DUTs
+| | And   Add PCI devices to DUTs from 3-node single link topology
+| | And   Add No Multi Seg to all DUTs
+| | And   Apply startup configuration on all VPP DUTs
+| | When  L2 bridge domains with Vhost-User initialized in a 3-node circular topology
+| | ...   | ${bd_id1} | ${bd_id2} | ${sock1} | ${sock2}
+| | ${vm1}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut1} | ${sock1} | ${sock2} | DUT1_VM1
+| | Set To Dictionary | ${dut1_vm_refs} | DUT1_VM1 | ${vm1}
+| | ${vm2}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut2} | ${sock1} | ${sock2} | DUT2_VM1
+| | Set To Dictionary | ${dut2_vm_refs} | DUT2_VM1 | ${vm2}
+| | Then Find PDR using binary search and pps | ${framesize} | ${binary_min}
+| | ...                                       | ${binary_max} | 3-node-bridge
+| | ...                                       | ${min_rate} | ${max_rate}
+| | ...                                       | ${threshold}
+| | ...                                       | ${glob_loss_acceptance}
+| | ...                                       | ${glob_loss_acceptance_type}
+
+| TC17: IMIX_v4_1 NDR binary search - DUT L2BD-VHOST - 4threads 4cores 2rxq
+| | [Documentation]
+| | ... | [Cfg] DUT runs L2BD switching config with 4 threads, 4 phy cores, \
+| | ... | 2 receive queues per NIC port. [Ver] Find NDR for IMIX_v4_1 frame size
+| | ... | using binary search start at 10GE linerate, step 5kpps.
+| | ... | IMIX_v4_1 = (28x64B;16x570B;4x1518B)
+| | [Tags] | 4_THREAD_NOHTT_RXQUEUES_2 | MULTI_THREAD | NDR | SKIP_PATCH
+| | ${framesize}= | Set Variable | IMIX_v4_1
+| | ${min_rate}= | Set Variable | 5000
+| | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_IMIX_v4_1}
+| | ${binary_min}= | Set Variable | ${min_rate}
+| | ${binary_max}= | Set Variable | ${max_rate}
+| | ${threshold}= | Set Variable | ${min_rate}
+| | ${dut1_vm_refs}= | Create Dictionary
+| | ${dut2_vm_refs}= | Create Dictionary
+| | Given Add '4' worker threads and rxqueues '2' without HTT to all DUTs
+| | And   Add PCI devices to DUTs from 3-node single link topology
+| | And   Add No Multi Seg to all DUTs
+| | And   Apply startup configuration on all VPP DUTs
+| | When  L2 bridge domains with Vhost-User initialized in a 3-node circular topology
+| | ...   | ${bd_id1} | ${bd_id2} | ${sock1} | ${sock2}
+| | ${vm1}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut1} | ${sock1} | ${sock2} | DUT1_VM1
+| | Set To Dictionary | ${dut1_vm_refs} | DUT1_VM1 | ${vm1}
+| | ${vm2}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut2} | ${sock1} | ${sock2} | DUT2_VM1
+| | Set To Dictionary | ${dut2_vm_refs} | DUT2_VM1 | ${vm2}
+| | Then Find NDR using binary search and pps | ${framesize} | ${binary_min}
+| | ...                                       | ${binary_max} | 3-node-bridge
+| | ...                                       | ${min_rate} | ${max_rate}
+| | ...                                       | ${threshold}
+
+| TC18: IMIX_v4_1 PDR binary search - DUT L2BD-VHOST - 4threads 4cores 2rxq
+| | [Documentation]
+| | ... | [Cfg] DUT runs L2BD switching config with 4 threads, 4 phy cores, \
+| | ... | 2 receive queues per NIC port. [Ver] Find PDR for IMIX_v4_1 frame size
+| | ... | using binary search start at 10GE linerate, step 5kpps, LT=0.5%.
+| | ... | IMIX_v4_1 = (28x64B;16x570B;4x1518B)
+| | [Tags] | 4_THREAD_NOHTT_RXQUEUES_2 | MULTI_THREAD | PDR | SKIP_PATCH
+| | ${framesize}= | Set Variable | IMIX_v4_1
+| | ${min_rate}= | Set Variable | 5000
+| | ${max_rate}= | Set Variable | ${10Ge_linerate_pps_IMIX_v4_1}
+| | ${binary_min}= | Set Variable | ${min_rate}
+| | ${binary_max}= | Set Variable | ${max_rate}
+| | ${threshold}= | Set Variable | ${min_rate}
+| | ${dut1_vm_refs}= | Create Dictionary
+| | ${dut2_vm_refs}= | Create Dictionary
+| | Given Add '4' worker threads and rxqueues '2' without HTT to all DUTs
+| | And   Add PCI devices to DUTs from 3-node single link topology
+| | And   Add No Multi Seg to all DUTs
+| | And   Apply startup configuration on all VPP DUTs
+| | When  L2 bridge domains with Vhost-User initialized in a 3-node circular topology
+| | ...   | ${bd_id1} | ${bd_id2} | ${sock1} | ${sock2}
+| | ${vm1}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut1} | ${sock1} | ${sock2} | DUT1_VM1
+| | Set To Dictionary | ${dut1_vm_refs} | DUT1_VM1 | ${vm1}
+| | ${vm2}= | And Guest VM with dpdk-testpmd connected via vhost-user is setup
+| | ...     | ${dut2} | ${sock1} | ${sock2} | DUT2_VM1
+| | Set To Dictionary | ${dut2_vm_refs} | DUT2_VM1 | ${vm2}
+| | Then Find PDR using binary search and pps | ${framesize} | ${binary_min}
+| | ...                                       | ${binary_max} | 3-node-bridge
+| | ...                                       | ${min_rate} | ${max_rate}
+| | ...                                       | ${threshold}
+| | ...                                       | ${glob_loss_acceptance}
+| | ...                                       | ${glob_loss_acceptance_type}
+