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#
#     http://www.apache.org/licenses/LICENSE-2.0
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# limitations under the License.

*** Settings ***
| Resource | resources/libraries/robot/performance/performance_setup.robot
| Resource | resources/libraries/robot/crypto/ipsec.robot
| ...
| Force Tags | 3_NODE_SINGLE_LINK_TOPO | PERFTEST | HW_ENV | SCALE | NDRPDRDISC
| ... | IP4FWD | IPSEC | IPSECHW | IPSECTUN | NIC_Intel-XL710 | TNL_1000
| ...
| Suite Setup | Set up IPSec performance test suite | L3 | Intel-XL710
| ... | HW_cryptodev
| ...
| Suite Teardown | Tear down 3-node performance topology
| ...
| Test Setup | Set up performance test
| ...
| Test Teardown | Tear down performance discovery test | ${min_rate}pps
| ... | ${framesize} | ${traffic_profile}
| ...
| Documentation | *IPv4 IPsec tunnel mode performance test suite.*
| ...
| ... | *[Top] Network Topologies:* TG-DUT1-DUT2-TG 3-node circular topology
| ... | with single links between nodes.
| ... | *[Enc] Packet Encapsulations:* Eth-IPv4 on TG-DUTn,
| ... | Eth-IPv4-IPSec on DUT1-DUT2
| ... | *[Cfg] DUT configuration:* DUT1 and DUT2 are configured with multiple
| ... | IPsec tunnels between them. DUTs get IPv4 traffic from TG, encrypt it
| ... | and send to another DUT, where packets are decrypted and sent back to TG
| ... | *[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 number
| ... | of packets transmitted. NDR is discovered for different
| ... | number of IPsec tunnels using binary 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, number of flows per flow-group equals to
| ... | number of IPSec tunnels) 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. Incrementing of IP.dst (IPv4 destination address) field
| ... | is applied to both streams.
| ... | *[Ref] Applicable standard specifications:* RFC4303 and RFC2544.

*** Variables ***
# XL710-DA2 bandwidth limit ~49Gbps/2=24.5Gbps
| ${s_24.5G}= | ${24500000000}
# XL710-DA2 Mpps limit 37.5Mpps/2=18.75Mpps
| ${s_18.75Mpps}= | ${18750000}
| ${tg_if1_ip4}= | 192.168.10.2
| ${dut1_if1_ip4}= | 192.168.10.1
| ${dut1_if2_ip4}= | 172.168.1.1
| ${dut2_if1_ip4}= | 172.168.1.2
| ${dut2_if2_ip4}= | 192.168.20.1
| ${tg_if2_ip4}= | 192.168.20.2
| ${raddr_ip4}= | 20.0.0.0
| ${laddr_ip4}= | 10.0.0.0
| ${addr_range}= | ${32}
| ${ipsec_overhead}= | ${58}
| ${n_tunnels}= | ${1000}
# Traffic profile:
| ${traffic_profile}= | trex-sl-3n-ethip4-ip4dst${n_tunnels}

*** Test Cases ***
| tc01-64B-1t1c-ethip4ipsecscale1000tnl-ip4base-tnl-cbc-sha1-ndrdisc
| | [Documentation]
| | ... | [Cfg] DUTs run 1000 IPsec tunnels CBC-SHA1 in each direction,\
| | ... | configured with 1 thread, 1 phy core, 1 receive queue per NIC port.
| | ... | [Ver] Find NDR for 64 Byte frames\
| | ... | using binary search start at 40GE linerate, step 50kpps.
| | ...
| | [Tags] | 64B | 1T1C | STHREAD | NDRDISC
| | ...
| | # FIXME: Move repeated lines into a keyword.
| | ${framesize}= | Set Variable | ${64}
| | ${min_rate}= | Set Variable | ${50000}
| | ${max_rate}= | Set Variable | ${s_18.75Mpps}
| | ${binary_min}= | Set Variable | ${min_rate}
| | ${binary_max}= | Set Variable | ${max_rate}
| | ${threshold}= | Set Variable | ${min_rate}
| | ${encr_alg}= | Crypto Alg AES CBC 128
| | ${auth_alg}= | Integ Alg SHA1 96
| | Given Add '1' worker threads and '1' rxqueues in 3-node single-link circular topology
| | And Add PCI devices to all DUTs
| | And Add no multi seg to all DUTs
| | And Add cryptodev to all DUTs | ${1}
| | And Add DPDK dev default RXD to all DUTs | 2048
| | And Add DPDK dev default TXD to all DUTs | 2048
| | And Apply startup configuration on all VPP DUTs
| | When Generate keys for IPSec | ${encr_alg} | ${auth_alg}
| | And Initialize IPSec in 3-node circular topology
| | And Vpp Route Add | ${dut1} | ${raddr_ip4} | 8 | ${dut2_if1_ip4}
| | ... | ${dut1_if2}
| | And Vpp Route Add | ${dut2} | ${laddr_ip4} | 8 | ${dut1_if2_ip4}
| | ... | ${dut2_if1}
| | And VPP IPsec Add Multiple Tunnels
| | ... | ${dut1} | ${dut2} | ${dut1_if2} | ${dut2_if1} | ${n_tunnels}
| | ... | ${encr_alg} | ${encr_key} | ${auth_alg} | ${auth_key}
| | ... | ${dut1_if2_ip4} | ${dut2_if1_ip4} | ${laddr_ip4} | ${raddr_ip4}
| | ... | ${addr_range}
| | And Set interfaces in path in 3-node circular topology up
| | Then Find NDR using binary search and pps | ${framesize}
| | ... | ${binary_min} | ${binary_max} | ${traffic_profile}
| | ... | ${min_rate} | ${max_rate} | ${threshold}

| tc02-64B-1t1c-ethip4ipsecscale1000tnl-ip4base-tnl-cbc-sha1-pdrdisc
| | [Documentation]
| | ... | [Cfg] DUTs run 1000 IPsec tunnels CBC-SHA1 in each direction,\
| | ... | configured with 1 thread, 1 phy core, 1 receive queue per NIC port.
| | ... | [Ver] Find PDR for 64 Byte frames using binary search start at 40GE\
| | ... | linerate, step 50kpps and loss tolerance of 0.5%.
| | ...
| | [Tags] | 64B | 1T1C | STHREAD | PDRDISC | SKIP_PATCH
| | ...
| | ${framesize}= | Set Variable | ${64}
| | ${min_rate}= | Set Variable | ${50000}
| | ${max_rate}= | Set Variable | ${s_18.75Mpps}
| | ${binary_min}= | Set Variable | ${min_rate}
| | ${binary_max}= | Set Variable | ${max_rate}
| | ${threshold}= | Set Variable | ${min_rate}
| | ${encr_alg}= | Crypto Alg AES CBC 128
| | ${auth_alg}= | Integ Alg SHA1 96
| | Given Add '1' worker threads and '1' rxqueues in 3-node single-link circular topology
| | And Add PCI devices to all DUTs
| | And Add no multi seg to all DUTs
| | And Add cryptodev to all DUTs | ${1}
| | And Add DPDK dev default RXD to all DUTs | 2048
| | And Add DPDK dev default TXD to all DUTs | 2048
| | And Apply startup configuration on all VPP DUTs
| | When Generate keys for IPSec | ${encr_alg} | ${auth_alg}
| | And Initialize IPSec in 3-node circular topology
| | And Vpp Route Add | ${dut1} | ${raddr_ip4} | 8 | ${dut2_if1_ip4}
| | ... | ${dut1_if2}
| | And Vpp Route Add | ${dut2} | ${laddr_ip4} | 8 | ${dut1_if2_ip4}
| | ... | ${dut2_if1}
| | And VPP IPsec Add Multiple Tunnels
| | ... | ${dut1} | ${dut2} | ${dut1_if2} | ${dut2_if1} | ${n_tunnels}
| | ... | ${encr_alg} | ${encr_key} | ${auth_alg} | ${auth_key}
| | ... | ${dut1_if2_ip4} | ${dut2_if1_ip4} | ${laddr_ip4} | ${raddr_ip4}
| | ... | ${addr_range}
| | And Set interfaces in path in 3-node circular topology up
| | Then Find PDR using binary search and pps | ${framesize}
| | ... | ${binary_min} | ${binary_max} | ${traffic_profile}
| | ... | ${min_rate} | ${max_rate} | ${threshold} | ${perf_pdr_loss_acceptance}
| | ... | ${perf_pdr_loss_acceptance_type}

| tc03-1518B-1t1c-ethip4ipsecscale1000tnl-ip4base-tnl-cbc-sha1-ndrdisc
| | [Documentation]
| | ... | [Cfg] DUTs run 1000 IPsec tunnels CBC-SHA1 in each direction,\
| | ... | configured with 1 thread, 1 phy core, 1 receive queue per NIC port.
| | ... | [Ver] Find NDR for 1518 Byte frames\
| | ... | using binary search start at 40GE linerate, step 50kpps.
| | ...
| | [Tags] | 1518B | 1T1C | STHREAD | NDRDISC
| | ...
| | ${framesize}= | Set Variable | ${1518}
| | ${min_rate}= | Set Variable | ${50000}
| | ${max_rate}= | Calculate pps | ${s_24.5G} | ${framesize + ${ipsec_overhead}}
| | ${binary_min}= | Set Variable | ${min_rate}
| | ${binary_max}= | Set Variable | ${max_rate}
| | ${threshold}= | Set Variable | ${min_rate}
| | ${encr_alg}= | Crypto Alg AES CBC 128
| | ${auth_alg}= | Integ Alg SHA1 96
| | Given Add '1' worker threads and '1' rxqueues in 3-node single-link circular topology
| | And Add PCI devices to all DUTs
| | And Add cryptodev to all DUTs | ${1}
| | And Add DPDK dev default RXD to all DUTs | 2048
| | And Add DPDK dev default TXD to all DUTs | 2048
| | And Apply startup configuration on all VPP DUTs
| | When Generate keys for IPSec | ${encr_alg} | ${auth_alg}
| | And Initialize IPSec in 3-node circular topology
| | And Vpp Route Add | ${dut1} | ${raddr_ip4} | 8 | ${dut2_if1_ip4}
| | ... | ${dut1_if2}
| | And Vpp Route Add | ${dut2} | ${laddr_ip4} | 8 | ${dut1_if2_ip4}
| | ... | ${dut2_if1}
| | And VPP IPsec Add Multiple Tunnels
| | ... | ${dut1} | ${dut2} | ${dut1_if2} | ${dut2_if1} | ${n_tunnels}
| | ... | ${encr_alg} | ${encr_key} | ${auth_alg} | ${auth_key}
| | ... | ${dut1_if2_ip4} | ${dut2_if1_ip4} | ${laddr_ip4} | ${raddr_ip4}
| | ... | ${addr_range}
| | And Set interfaces in path in 3-node circular topology up
| | Then Find NDR using binary search and pps | ${framesize}
| | ... | ${binary_min} | ${binary_max} | ${traffic_profile}
| | ... | ${min_rate} | ${max_rate} | ${threshold}

| tc04-1518B-1t1c-ethip4ipsecscale1000tnl-ip4base-tnl-cbc-sha1-pdrdisc
| | [Documentation]
| | ... | [Cfg] DUTs run 1000 IPsec tunnel CBC-SHA1 in each direction,\
| | ... | configured with 1 thread, 1 phy core, 1 receive queue per NIC port.
| | ... | [Ver] Find PDR for 1518 Byte frames using binary search start at 40GE\
| | ... | linerate, step 50kpps and loss tolerance of 0.5%.
| | ...
| | [Tags] | 1518B | 1T1C | STHREAD | PDRDISC | SKIP_PATCH
| | ...
| | ${framesize}= | Set Variable | ${1518}
| | ${min_rate}= | Set Variable | ${50000}
| | ${max_rate}= | Calculate pps | ${s_24.5G} | ${framesize + ${ipsec_overhead}}
| | ${binary_min}= | Set Variable | ${min_rate}
| | ${binary_max}= | Set Variable | ${max_rate}
| | ${threshold}= | Set Variable | ${min_rate}
| | ${encr_alg}= | Crypto Alg AES CBC 128
| | ${auth_alg}= | Integ Alg SHA1 96
| | Given Add '1' worker threads and '1' rxqueues in 3-node single-link circular topology
| | And Add PCI devices to all DUTs
| | And Add cryptodev to all DUTs | ${1}
| | And Add DPDK dev default RXD to all DUTs | 2048
| | And Add DPDK dev default TXD to all DUTs | 2048
| | And Apply startup configuration on all VPP DUTs
| | When Generate keys for IPSec | ${encr_alg} | ${auth_alg}
| | And Initialize IPSec in 3-node circular topology
| | And Vpp Route Add | ${dut1} | ${raddr_ip4} | 8 | ${dut2_if1_ip4}
| | ... | ${dut1_if2}
| | And Vpp Route Add | ${dut2} | ${laddr_ip4} | 8 | ${dut1_if2_ip4}
| | ... | ${dut2_if1}
| | And VPP IPsec Add Multiple Tunnels
| | ... | ${dut1} | ${dut2} | ${dut1_if2} | ${dut2_if1} | ${n_tunnels}
| | ... | ${encr_alg} | ${encr_key} | ${auth_alg} | ${auth_key}
| | ... | ${dut1_if2_ip4} | ${dut2_if1_ip4} | ${laddr_ip4} | ${raddr_ip4}
| | ... | ${addr_range}
| | And Set interfaces in path in 3-node circular topology up
| | Then Find PDR using binary search and pps | ${framesize}
| | ... | ${binary_min} | ${binary_max} | ${traffic_profile}
| | ... | ${min_rate} | ${max_rate} | ${threshold} | ${perf_pdr_loss_acceptance}
| | ... | ${perf_pdr_loss_acceptance_type}

| tc05-IMIX-1t1c-ethip4ipsecscale1000tnl-ip4base-tnl-cbc-sha1-ndrdisc
| | [Documentation]
| | ... | [Cfg] DUTs run 1000 IPsec tunnels CBC-SHA1 in each direction,\
| | ... | configured with 1 thread, 1 phy core, 1 receive queue per NIC port.
| | ... | [Ver] Find NDR for IMIX_v4_1 frames\
| | ... | using binary search start at 40GE linerate, step 50kpps.
| | ... | IMIX_v4_1 = (28x64B; 16x570B; 4x1518B)
| | ...
| | [Tags] | IMIX | 1T1C | STHREAD | NDRDISC
| | ...
| | ${framesize}= | Set Variable | IMIX_v4_1
| | ${imix_size}= | Get Frame Size | ${framesize}
| | ${min_rate}= | Set Variable | ${50000}
| | ${max_rate}= | Calculate pps | ${s_24.5G} | ${imix_size} + ${ipsec_overhead}
| | ${binary_min}= | Set Variable | ${min_rate}
| | ${binary_max}= | Set Variable | ${max_rate}
| | ${threshold}= | Set Variable | ${min_rate}
| | ${encr_alg}= | Crypto Alg AES CBC 128
| | ${auth_alg}= | Integ Alg SHA1 96
| | Given Add '1' worker threads and '1' rxqueues in 3-node single-link circular topology
| | And Add PCI devices to all DUTs
| | And Add cryptodev to all DUTs | ${1}
| | And Add DPDK dev default RXD to all DUTs | 2048
| | And Add DPDK dev default TXD to all DUTs | 2048
| | And Apply startup configuration on all VPP DUTs
| | When Generate keys for IPSec | ${encr_alg} | ${auth_alg}
| | And Initialize IPSec in 3-node circular topology
| | And Vpp Route Add | ${dut1} | ${raddr_ip4} | 8 | ${dut2_if1_ip4}
| | ... | ${dut1_if2}
| | And Vpp Route Add | ${dut2} | ${laddr_ip4} | 8 | ${dut1_if2_ip4}
| | ... | ${dut2_if1}
| | And VPP IPsec Add Multiple Tunnels
| | ... | ${dut1} | ${dut2} | ${dut1_if2} | ${dut2_if1} | ${n_tunnels}
| | ... | ${encr_alg} | ${encr_key} | ${auth_alg} | ${auth_key}
| | ... | ${dut1_if2_ip4} | ${dut2_if1_ip4} | ${laddr_ip4} | ${raddr_ip4}
| | ... | ${addr_range}
| | And Set interfaces in path in 3-node circular topology up
| | Then Find NDR using binary search and pps | ${framesize}
| | ... | ${binary_min} | ${binary_max} | ${traffic_profile}
| | ... | ${min_rate} | ${max_rate} | ${threshold}

| tc06-IMIX-1t1c-ethip4ipsecscale1000tnl-ip4base-tnl-cbc-sha1-pdrdisc
| | [Documentation]
| | ... | [Cfg] DUTs run 1000 IPsec tunnels CBC-SHA1 in each direction,\
| | ... | configured with 1 thread, 1 phy core, 1 receive queue per NIC port.
| | ... | [Ver] Find PDR for IMIX_v4_1 frames using binary search start at 40GE\
| | ... | linerate, step 50kpps and loss tolerance of 0.5%.
| | ... | IMIX_v4_1 = (28x64B; 16x570B; 4x1518B)
| | ...
| | [Tags] | IMIX | 1T1C | STHREAD | PDRDISC | SKIP_PATCH
| | ...
| | ${framesize}= | Set Variable | IMIX_v4_1
| | ${imix_size}= | Get Frame Size | ${framesize}
| | ${min_rate}= | Set Variable | ${50000}
| | ${max_rate}= | Calculate pps | ${s_24.5G} | ${imix_size} + ${ipsec_overhead}
| | ${binary_min}= | Set Variable | ${min_rate}
| | ${binary_max}= | Set Variable | ${max_rate}
| | ${threshold}= | Set Variable | ${min_rate}
| | ${encr_alg}= | Crypto Alg AES CBC 128
| | ${auth_alg}= | Integ Alg SHA1 96
| | Given Add '1' worker threads and '1' rxqueues in 3-node single-link circular topology
| | And Add PCI devices to all DUTs
| | And Add cryptodev to all DUTs | ${1}
| | And Add DPDK dev default RXD to all DUTs | 2048
| | And Add DPDK dev default TXD to all DUTs | 2048
| | And Apply startup configuration on all VPP DUTs
| | When Generate keys for IPSec | ${encr_alg} | ${auth_alg}
| | And Initialize IPSec in 3-node circular topology
| | And Vpp Route Add | ${dut1} | ${raddr_ip4} | 8 | ${dut2_if1_ip4}
| | ... | ${dut1_if2}
| | And Vpp Route Add | ${dut2} | ${laddr_ip4} | 8 | ${dut1_if2_ip4}
| | ... | ${dut2_if1}
| | And VPP IPsec Add Multiple Tunnels
| | ... | ${dut1} | ${dut2} | ${dut1_if2} | ${dut2_if1} | ${n_tunnels}
| | ... | ${encr_alg} | ${encr_key} | ${auth_alg} | ${auth_key}
| | ... | ${dut1_if2_ip4} | ${dut2_if1_ip4} | ${laddr_ip4} | ${raddr_ip4}
| | ... | ${addr_range}
| | And Set interfaces in path in 3-node circular topology up
| | Then Find PDR using binary search and pps | ${framesize}
| | ... | ${binary_min} | ${binary_max} | ${traffic_profile}
| | ... | ${min_rate} | ${max_rate} | ${threshold} | ${perf_pdr_loss_acceptance}
| | ... | ${perf_pdr_loss_acceptance_type}

| tc07-64B-2t2c-ethip4ipsecscale1000tnl-ip4base-tnl-cbc-sha1-ndrdisc
| | [Documentation]
| | ... | [Cfg] DUTs run 1000 IPsec tunnels CBC-SHA1 in each direction,\
| | ... | configured with 2 thread, 2 phy core, 1 receive queue per NIC port.
| | ... | [Ver] Find NDR for 64 Byte frames\
| | ... | using binary search start at 40GE linerate, step 50kpps.
| | ...
| | [Tags] | 64B | 2T2C | MTHREAD | NDRDISC
| | ...
| | ${framesize}= | Set Variable | ${64}
| | ${min_rate}= | Set Variable | ${50000}
| | ${max_rate}= | Set Variable | ${s_18.75Mpps}
| | ${binary_min}= | Set Variable | ${min_rate}
| | ${binary_max}= | Set Variable | ${max_rate}
| | ${threshold}= | Set Variable | ${min_rate}
| | ${encr_alg}= | Crypto Alg AES CBC 128
| | ${auth_alg}= | Integ Alg SHA1 96
| | Given Add '2' worker threads and '1' rxqueues in 3-node single-link circular topology
| | And Add PCI devices to all DUTs
| | And Add no multi seg to all DUTs
| | And Add cryptodev to all DUTs | ${2}
| | And Add DPDK dev default RXD to all DUTs | 2048
| | And Add DPDK dev default TXD to all DUTs | 2048
| | And Apply startup configuration on all VPP DUTs
| | When Generate keys for IPSec | ${encr_alg} | ${auth_alg}
| | And Initialize IPSec in 3-node circular topology
| | And Vpp Route Add | ${dut1} | ${raddr_ip4} | 8 | ${dut2_if1_ip4}
| | ... | ${dut1_if2}
| | And Vpp Route Add | ${dut2} | ${laddr_ip4} | 8 | ${dut1_if2_ip4}
| | ... | ${dut2_if1}
| | And VPP IPsec Add Multiple Tunnels
| | ... | ${dut1} | ${dut2} | ${dut1_if2} | ${dut2_if1} | ${n_tunnels}
| | ... | ${encr_alg} | ${encr_key} | ${auth_alg} | ${auth_key}
| | ... | ${dut1_if2_ip4} | ${dut2_if1_ip4} | ${laddr_ip4} | ${raddr_ip4}
| | ... | ${addr_range}
| | And Set interfaces in path in 3-node circular topology up
| | Then Find NDR using binary search and pps | ${framesize}
| | ... | ${binary_min} | ${binary_max} | ${traffic_profile}
| | ... | ${min_rate} | ${max_rate} | ${threshold}

| tc08-64B-2t2c-ethip4ipsecscale1000tnl-ip4base-tnl-cbc-sha1-pdrdisc
| | [Documentation]
| | ... | [Cfg] DUTs run 1000 IPsec tunnels CBC-SHA1 in each direction,\
| | ... | configured with 2 thread, 2 phy core, 1 receive queue per NIC port.
| | ... | [Ver] Find PDR for 64 Byte frames using binary search start at 40GE\
| | ... | linerate, step 50kpps and loss tolerance of 0.5%.
| | ...
| | [Tags] | 64B | 2T2C | MTHREAD | PDRDISC | SKIP_PATCH
| | ...
| | ${framesize}= | Set Variable | ${64}
| | ${min_rate}= | Set Variable | ${50000}
| | ${max_rate}= | Set Variable | ${s_18.75Mpps}
| | ${binary_min}= | Set Variable | ${min_rate}
| | ${binary_max}= | Set Variable | ${max_rate}
| | ${threshold}= | Set Variable | ${min_rate}
| | ${encr_alg}= | Crypto Alg AES CBC 128
| | ${auth_alg}= | Integ Alg SHA1 96
| | Given Add '2' worker threads and '1' rxqueues in 3-node single-link circular topology
| | And Add PCI devices to all DUTs
| | And Add no multi seg to all DUTs
| | And Add cryptodev to all DUTs | ${2}
| | And Add DPDK dev default RXD to all DUTs | 2048
| | And Add DPDK dev default TXD to all DUTs | 2048
| | And Apply startup configuration on all VPP DUTs
| | When Generate keys for IPSec | ${encr_alg} | ${auth_alg}
| | And Initialize IPSec in 3-node circular topology
| | And Vpp Route Add | ${dut1} | ${raddr_ip4} | 8 | ${dut2_if1_ip4}
| | ... | ${dut1_if2}
| | And Vpp Route Add | ${dut2} | ${laddr_ip4} | 8 | ${dut1_if2_ip4}
| | ... | ${dut2_if1}
| | And VPP IPsec Add Multiple Tunnels
| | ... | ${dut1} | ${dut2} | ${dut1_if2} | ${dut2_if1} | ${n_tunnels}
| | ... | ${encr_alg} | ${encr_key} | ${auth_alg} | ${auth_key}
| | ... | ${dut1_if2_ip4} | ${dut2_if1_ip4} | ${laddr_ip4} | ${raddr_ip4}
| | ... | ${addr_range}
| | And Set interfaces in path in 3-node circular topology up
| | Then Find PDR using binary search and pps | ${framesize}
| | ... | ${binary_min} | ${binary_max} | ${traffic_profile}
| | ... | ${min_rate} | ${max_rate} | ${threshold} | ${perf_pdr_loss_acceptance}
| | ... | ${perf_pdr_loss_acceptance_type}