# 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/default.robot | Resource | resources/libraries/robot/ipv4.robot | Resource | resources/libraries/robot/ipv6.robot | Resource | resources/libraries/robot/interfaces.robot | Resource | resources/libraries/robot/testing_path.robot | Resource | resources/libraries/robot/traffic.robot | Resource | resources/libraries/robot/l2_traffic.robot | Library | resources.libraries.python.Trace | Library | resources.libraries.python.IPUtil | Force Tags | HW_ENV | VM_ENV | 3_NODE_DOUBLE_LINK_TOPO | Test Setup | Func Test Setup | Test Teardown | Func Test Teardown | Documentation | *Vpn routed forwarding - baseline IPv4* | ... | *[Top] Network Topologies:* TG=DUT1=DUT2=TG 3-node topology with two | ... | links in between nodes. | ... | *[Enc] Packet Encapsulations:* Eth-IPv4-ICMPv4 for L2 switching of | ... | IPv4. | ... | *[Cfg] DUT configuration:* Each DUT is configured with two VRF tables; | ... | Separation of traffic is tested by IP packets; Basic ARP and ROUTES are | ... | set on DUT nodes; IP addresses are set on DUT interfaces. | ... | *[Ver] TG verification:* Test ICMPv4 Echo Request packets | ... | are sent by TG on link to DUT1, DUT2 or back to TG; On receipt TG | ... | verifies packets for correctness and their IPv4 src-addr, dst-addr, | ... | and MAC addresses. | ... | *[Ref] Applicable standard specifications:* *** Variables *** | ${fib_table_1}= | 9 | ${fib_table_2}= | 99 | ${dut1_to_tg_ip1}= | 10.0.0.3 | ${dut1_to_tg_ip2}= | 10.0.0.4 | ${dut2_to_tg_ip1}= | 30.0.0.3 | ${dut2_to_tg_ip2}= | 30.0.0.4 | ${dut1_to_dut2_ip1}= | 20.0.0.1 | ${dut1_to_dut2_ip2}= | 20.0.0.2 | ${dut2_to_dut1_ip1}= | 20.0.0.3 | ${dut2_to_dut1_ip2}= | 20.0.0.4 | ${tg_dut1_ip1}= | 10.0.0.1 | ${tg_dut1_ip2}= | 10.0.0.2 | ${tg_dut2_ip1}= | 30.0.0.1 | ${tg_dut2_ip2}= | 30.0.0.2 | ${ip_prefix}= | 24 *** Test Cases *** | TC01: TG packets routed to DUT ingress interface, VPP configured with two VRFs | | [Documentation] | | ... | [Top] TG=DUT1=DUT2=TG | | ... | [Enc] Eth-IPv4-ICMPv4. | | ... | [Cfg] DUT1 and DUT2 are both configured with two fib tables. Each | | ... | table is assigned to 2 interfaces to separate the traffic. Interfaces | | ... | are configured with IP addresses from *Variables*. On every ingress | | ... | and egress port on DUT is configured ARP and each DUT is configured | | ... | with one route. | | ... | [Ver] Packet is send from TG->DUT1-if1 to DUT1->TG-if1 and from | | ... | TG->DUT1-if2 to DUT1->TG-if2 and checked if arrived. | | Given Path for Double-Link 3-node testing is set | | ... | ${nodes['TG']} | ${nodes['DUT1']} | | ... | ${nodes['DUT2']} | ${nodes['TG']} | | And Interfaces in Double-Link 3-node path are UP | | When Setup Env - 2xVRF Each Node | | Then Node replies to ICMP echo request | ${tg_node} | | ... | ${tg_to_dut1_if1} | ${dut1_to_tg_if1_mac} | | ... | ${tg_to_dut1_if1_mac} | ${dut1_to_tg_ip1} | ${tg_dut1_ip1} | 5 | | And Node replies to ICMP echo request | ${tg_node} | | ... | ${tg_to_dut1_if2} | ${dut1_to_tg_if2_mac} | | ... | ${tg_to_dut1_if2_mac} | ${dut1_to_tg_ip2} | ${tg_dut1_ip2} | 5 | TC02: TG packets routed to DUT egress interface, VPP configured with two VRFs | | [Documentation] | | ... | [Top] TG=DUT1=DUT2=TG | | ... | [Enc] Eth-IPv4-ICMPv4. | | ... | [Cfg] DUT1 and DUT2 are both configured with two fib tables. Each | | ... | table is assigned to 2 interfaces to separate the traffic. Interfaces | | ... | are configured with IP addresses from *Variables*. On every ingress | | ... | and egress port on DUT is configured ARP and each DUT is configured | | ... | with one route. | | ... | [Ver] Packet is send from TG->DUT1-if1 to DUT1->DUT2-if1 and from | | ... | TG->DUT1-if2 to DUT1->DUT2-if2 and checked if arrived. | | Given Path for Double-Link 3-node testing is set | | ... | ${nodes['TG']} | ${nodes['DUT1']} | | ... | ${nodes['DUT2']} | ${nodes['TG']} | | And Interfaces in Double-Link 3-node path are UP | | When Setup Env - 2xVRF Each Node | | Then Node replies to ICMP echo request | ${tg_node} | ${tg_to_dut1_if1} | | ... | ${dut1_to_tg_if1_mac} | ${tg_to_dut1_if1_mac} | | ... | ${dut1_to_dut2_ip1} | ${tg_dut1_ip1} | 5 | | And Node replies to ICMP echo request | ${tg_node} | ${tg_to_dut1_if2} | | ... | ${dut1_to_tg_if2_mac} | ${tg_to_dut1_if2_mac} | | ... | ${dut1_to_dut2_ip2} | ${tg_dut1_ip2} | 5 | TC03: TG packets routed to DUT2 ingress interface through DUT1, VPP configured with two VRFs | | [Documentation] | | ... | [Top] TG=DUT1=DUT2=TG | | ... | [Enc] Eth-IPv4-ICMPv4. | | ... | [Cfg] DUT1 and DUT2 are both configured with two fib tables. Each | | ... | table is assigned to 2 interfaces to separate the traffic. Interfaces | | ... | are configured with IP addresses from *Variables*. On every ingress | | ... | and egress port on DUT is configured ARP and each DUT is configured | | ... | with one route. | | ... | [Ver] Packet is send from TG->DUT1-if1 to DUT2->DUT1-if1 and from | | ... | TG->DUT1-if2 to DUT2->DUT1-if2 and checked if arrived. | | Given Path for Double-Link 3-node testing is set | | ... | ${nodes['TG']} | ${nodes['DUT1']} | | ... | ${nodes['DUT2']} | ${nodes['TG']} | | And Interfaces in Double-Link 3-node path are UP | | When Setup Env - 2xVRF Each Node | | Then Node replies to ICMP echo request | ${tg_node} | ${tg_to_dut1_if1} | | ... | ${dut1_to_tg_if1_mac} | ${tg_to_dut1_if1_mac} | | ... | ${dut2_to_dut1_ip1} | ${tg_dut1_ip1} | 5 | | And Node replies to ICMP echo request | ${tg_node} | ${tg_to_dut1_if2} | | ... | ${dut1_to_tg_if2_mac} | ${tg_to_dut1_if2_mac} | | ... | ${dut2_to_dut1_ip2} | ${tg_dut1_ip2} | 5 | TC04: TG packets routed to DUT2 egress interface through DUT1, VPP configured with two VRFs | | [Documentation] | | ... | [Top] TG=DUT1=DUT2=TG | | ... | [Enc] Eth-IPv4-ICMPv4. | | ... | [Cfg] DUT1 and DUT2 are both configured with two fib tables. Each | | ... | table is assigned to 2 interfaces to separate the traffic. Interfaces | | ... | are configured with IP addresses from *Variables*. On every ingress | | ... | and egress port on DUT is configured ARP and each DUT is configured | | ... | with one route. | | ... | [Ver] Packet is send from TG->DUT1-if1 to DUT2->TG-if1 and from | | ... | TG->DUT1-if2 to DUT2->TG-if2 and checked if arrived. | | Given Path for Double-Link 3-node testing is set | | ... | ${nodes['TG']} | ${nodes['DUT1']} | | ... | ${nodes['DUT2']} | ${nodes['TG']} | | And Interfaces in Double-Link 3-node path are UP | | When Setup Env - 2xVRF Each Node | | Then Node replies to ICMP echo request | ${tg_node} | ${tg_to_dut1_if1} | | ... | ${dut1_to_tg_if1_mac} | ${tg_to_dut1_if1_mac} | | ... | ${dut2_to_tg_ip1} | ${tg_dut1_ip1} | 5 | | And Node replies to ICMP echo request | ${tg_node} | ${tg_to_dut1_if2} | | ... | ${dut1_to_tg_if2_mac} | ${tg_to_dut1_if2_mac} | | ... | ${dut2_to_tg_ip2} | ${tg_dut1_ip2} | 5 | TC05: TG packets routed to TG through DUT1 and DUT2, VPP configured with two VRFs | | [Documentation] | | ... | [Top] TG=DUT1=DUT2=TG | | ... | [Enc] Eth-IPv4-ICMPv4. | | ... | [Cfg] DUT1 and DUT2 are both configured with two fib tables. Each | | ... | table is assigned to 2 interfaces to separate the traffic. Interfaces | | ... | are configured with IP addresses from *Variables*. On every ingress | | ... | and egress port on DUT is configured ARP and each DUT is configured | | ... | with one route. | | ... | [Ver] Packet is send from TG->DUT1-if1 to TG->DUT2-if1 and from | | ... | TG->DUT1-if2 to TG->DUT2-if2 and checked if arrived. | | Given Path for Double-Link 3-node testing is set | | ... | ${nodes['TG']} | ${nodes['DUT1']} | | ... | ${nodes['DUT2']} | ${nodes['TG']} | | And Interfaces in Double-Link 3-node path are UP | | When Setup Env - 2xVRF Each Node | | Then Send Packet And Check Headers | ${tg_node} | ${tg_dut1_ip1} | | ... | ${tg_dut2_ip1} | ${tg_to_dut1_if1} | ${tg_to_dut1_if1_mac} | | ... | ${dut1_to_tg_if1_mac} | ${tg_to_dut2_if1} | ${dut2_to_tg_if1_mac} | | ... | ${tg_to_dut2_if1_mac} | | And Send Packet And Check Headers | ${tg_node} | | ... | ${tg_dut1_ip2} | ${tg_dut2_ip2} | ${tg_to_dut1_if2} | | ... | ${tg_to_dut1_if2_mac} | ${dut1_to_tg_if2_mac} | ${tg_to_dut2_if2} | | ... | ${dut2_to_tg_if2_mac} | ${tg_to_dut2_if2_mac} | TC06: TG packets not routed to DUT ingress interface in different VRF, VPP configured with two VRFs | | [Documentation] | | ... | [Top] TG=DUT1=DUT2=TG | | ... | [Enc] Eth-IPv4-ICMPv4. | | ... | [Cfg] DUT1 and DUT2 are both configured with two fib tables. Each | | ... | table is assigned to 2 interfaces to separate the traffic. Interfaces | | ... | are configured with IP addresses from *Variables*. On every ingress | | ... | and egress port on DUT is configured ARP and each DUT is configured | | ... | with one route. | | ... | [Ver] Packet is send from TG->DUT1-if1 to DUT1->TG-if2 where it | | ... | should not arrive. | | [Tags] | SKIP_PATCH | | Given Path for Double-Link 3-node testing is set | | ... | ${nodes['TG']} | ${nodes['DUT1']} | | ... | ${nodes['DUT2']} | ${nodes['TG']} | | And Interfaces in Double-Link 3-node path are UP | | When Setup Env - 2xVRF Each Node | | Then Run Keyword And Expect Error | ICMP echo Rx timeout | | ... | Node replies to ICMP echo request | | ... | ${tg_node} | ${tg_to_dut1_if1} | | ... | ${dut1_to_tg_if1_mac} | ${tg_to_dut1_if1_mac} | | ... | ${dut1_to_tg_ip2} | ${tg_dut1_ip1} | 5 | TC07: TG packets not routed to DUT egress interface in different VRF, VPP configured with two VRFs | | [Documentation] | | ... | [Top] TG=DUT1=DUT2=TG | | ... | [Enc] Eth-IPv4-ICMPv4. | | ... | [Cfg] DUT1 and DUT2 are both configured with two fib tables. Each | | ... | table is assigned to 2 interfaces to separate the traffic. Interfaces | | ... | are configured with IP addresses from *Variables*. On every ingress | | ... | and egress port on DUT is configured ARP and each DUT is configured | | ... | with one route. | | ... | [Ver] Packet is send from TG->DUT1-if1 to DUT1->DUT2-if2 where it | | ... | should not arrive. | | [Tags] | SKIP_PATCH | | Given Path for Double-Link 3-node testing is set | | ... | ${nodes['TG']} | ${nodes['DUT1']} | | ... | ${nodes['DUT2']} | ${nodes['TG']} | | And Interfaces in Double-Link 3-node path are UP | | When Setup Env - 2xVRF Each Node | | Then Run Keyword And Expect Error | ICMP echo Rx timeout | | ... | Node replies to ICMP echo request | | ... | ${tg_node} | ${tg_to_dut1_if1} | | ... | ${dut1_to_tg_if1_mac} | ${tg_to_dut1_if1_mac} | | ... | ${dut1_to_dut2_ip2} | ${tg_dut1_ip1} | 5 | TC08: TG packets not routed to DUT2 ingress interface in different VRF through DUT1, VPP configured with two VRFs | | [Documentation] | | ... | [Top] TG=DUT1=DUT2=TG | | ... | [Enc] Eth-IPv4-ICMPv4. | | ... | [Cfg] DUT1 and DUT2 are both configured with two fib tables. Each | | ... | table is assigned to 2 interfaces to separate the traffic. Interfaces | | ... | are configured with IP addresses from *Variables*. On every ingress | | ... | and egress port on DUT is configured ARP and each DUT is configured | | ... | with one route. | | ... | [Ver] Packet is send from TG->DUT1-if1 to DUT2->DUT1-if2 where it | | ... | should not arrive. | | [Tags] | SKIP_PATCH | | Given Path for Double-Link 3-node testing is set | | ... | ${nodes['TG']} | ${nodes['DUT1']} | | ... | ${nodes['DUT2']} | ${nodes['TG']} | | And Interfaces in Double-Link 3-node path are UP | | When Setup Env - 2xVRF Each Node | | Then Run Keyword And Expect Error | ICMP echo Rx timeout | | ... | Node replies to ICMP echo request | | ... | ${tg_node} | ${tg_to_dut1_if1} | | ... | ${dut1_to_tg_if1_mac} | ${tg_to_dut1_if1_mac} | | ... | ${dut2_to_dut1_ip2} | ${tg_dut1_ip1} | 5 | TC09: TG packets not routed to DUT2 egress interface in different VRF through DUT1, VPP configured with two VRFs | | [Documentation] | | ... | [Top] TG=DUT1=DUT2=TG | | ... | [Enc] Eth-IPv4-ICMPv4. | | ... | [Cfg] DUT1 and DUT2 are both configured with two fib tables. Each | | ... | table is assigned to 2 interfaces to separate the traffic. Interfaces | | ... | are configured with IP addresses from *Variables*. On every ingress | | ... | and egress port on DUT is configured ARP and each DUT is configured | | ... | with one route. | | ... | [Ver] Packet is send from TG->DUT1-if1 to DUT2->TG-if2 where it | | ... | should not arrive. | | [Tags] | SKIP_PATCH | | Given Path for Double-Link 3-node testing is set | | ... | ${nodes['TG']} | ${nodes['DUT1']} | | ... | ${nodes['DUT2']} | ${nodes['TG']} | | And Interfaces in Double-Link 3-node path are UP | | When Setup Env - 2xVRF Each Node | | Then Run Keyword And Expect Error | ICMP echo Rx timeout | | ... | Node replies to ICMP echo request | | ... | ${tg_node} | ${tg_to_dut1_if1} | | ... | ${dut1_to_tg_if1_mac} | ${tg_to_dut1_if1_mac} | | ... | ${dut2_to_tg_ip2} | ${tg_dut1_ip1} | 5 | TC10: TG packets not routed to TG in different VRF through DUT1 and DUT2, VPP configured with two VRFs | | [Documentation] | | ... | [Top] TG=DUT1=DUT2=TG. | | ... | [Enc] Eth-IPv4-ICMPv4. | | ... | [Cfg] DUT1 and DUT2 are both configured with two fib tables. Each | | ... | table is assigned to 2 interfaces to separate the traffic. Interfaces | | ... | are configured with IP addresses from *Variables*. On every ingress | | ... | and egress port on DUT is configured ARP and each DUT is configured | | ... | with one route. | | ... | [Ver] Packet is send from TG->DUT1-if1 to TG->DUT2-if2 where it | | ... | should not arrive. | | [Tags] | SKIP_PATCH | | Given Path for Double-Link 3-node testing is set | | ... | ${nodes['TG']} | ${nodes['DUT1']} | | ... | ${nodes['DUT2']} | ${nodes['TG']} | | And Interfaces in Double-Link 3-node path are UP | | When Setup Env - 2xVRF Each Node | | Then Run Keyword And Expect Error | ICMP echo Rx timeout | | ... | Send Packet And Check Headers | ${tg_node} | ${tg_dut1_ip1} | | ... | ${tg_dut2_ip2} | ${tg_to_dut1_if1} | | ... | ${tg_to_dut1_if1_mac} | ${dut1_to_tg_if1_mac} | ${tg_to_dut2_if2} | | ... | ${dut2_to_tg_if2_mac} | ${tg_to_dut2_if2_mac} *** Keywords *** | Setup Env - 2xVRF Each Node | | [Documentation] | | ... | Environment is set up with 2 fib tables on each DUT. DUT1-TG-IF1 and \ | | ... | DUT1-DUT2-IF1 are assigned to FIB1, and DUT1-TG-IF2 and DUT1-DUT2-IF2 | | ... | are assigned to FIB2 (the some done on DUT2, just opposite). IP | | ... | addresses are subsequently set on interfaces, and ARP is set for | | ... | neighbors. The last setting is route for each fib table. | | ... | | ${dut1_if1_idx}= | Get Interface SW Index | | ... | ${dut1_node} | ${dut1_to_dut2_if1} | | ${dut1_if2_idx}= | Get Interface SW Index | | ... | ${dut1_node} | ${dut1_to_dut2_if2} | | ${dut2_if1_idx}= | Get Interface SW Index | | ... | ${dut2_node} | ${dut2_to_dut1_if1} | | ${dut2_if2_idx}= | Get Interface SW Index | | ... | ${dut2_node} | ${dut2_to_dut1_if2} | | And Add fib table | ${dut1_node} | | ... | ${tg_dut2_ip1} | ${ip_prefix} | ${fib_table_1} | | ... | via ${dut2_to_dut1_ip1} sw_if_index ${dut1_if1_idx} multipath | | And Add fib table | ${dut1_node} | | ... | ${tg_dut2_ip2} | ${ip_prefix} | ${fib_table_2} | | ... | via ${dut1_to_dut2_ip2} sw_if_index ${dut1_if2_idx} multipath | | And Add fib table | ${dut2_node} | | ... | ${tg_dut1_ip1} | ${ip_prefix} | ${fib_table_1} | | ... | via ${dut2_to_dut1_ip1} sw_if_index ${dut2_if1_idx} multipath | | And Add fib table | ${dut2_node} | | ... | ${tg_dut1_ip2} | ${ip_prefix} | ${fib_table_2} | | ... | via ${dut2_to_dut1_ip2} sw_if_index ${dut2_if2_idx} multipath | | Assign Interface To Fib Table | | ... | ${dut1_node} | ${dut1_to_dut2_if1} | ${fib_table_1} | | Assign Interface To Fib Table | | ... | ${dut1_node} | ${dut1_to_dut2_if2} | ${fib_table_2} | | Assign Interface To Fib Table | | ... | ${dut1_node} | ${dut1_to_tg_if1} | ${fib_table_1} | | Assign Interface To Fib Table | | ... | ${dut1_node} | ${dut1_to_tg_if2} | ${fib_table_2} | | Assign Interface To Fib Table | | ... | ${dut2_node} | ${dut2_to_dut1_if1} | ${fib_table_1} | | Assign Interface To Fib Table | | ... | ${dut2_node} | ${dut2_to_dut1_if2} | ${fib_table_2} | | Assign Interface To Fib Table | | ... | ${dut2_node} | ${dut2_to_tg_if1} | ${fib_table_1} | | Assign Interface To Fib Table | | ... | ${dut2_node} | ${dut2_to_tg_if2} | ${fib_table_2} | | And Set Interface Address | | ... | ${dut1_node} | ${dut1_to_tg_if1} | ${dut1_to_tg_ip1} | ${ip_prefix} | | And Set Interface Address | | ... | ${dut1_node} | ${dut1_to_tg_if2} | ${dut1_to_tg_ip2} | ${ip_prefix} | | And Set Interface Address | | ... | ${dut1_node} | ${dut1_to_dut2_if1} | | ... | ${dut1_to_dut2_ip1} | ${ip_prefix} | | And Set Interface Address | | ... | ${dut1_node} | ${dut1_to_dut2_if2} | | ... | ${dut1_to_dut2_ip2} | ${ip_prefix} | | And Set Interface Address | | ... | ${dut2_node} | ${dut2_to_tg_if1} | ${dut2_to_tg_ip1} | ${ip_prefix} | | And Set Interface Address | | ... | ${dut2_node} | ${dut2_to_tg_if2} | ${dut2_to_tg_ip2} | ${ip_prefix} | | And Set Interface Address | | ... | ${dut2_node} | ${dut2_to_dut1_if1} | | ... | ${dut2_to_dut1_ip1} | ${ip_prefix} | | And Set Interface Address | | ... | ${dut2_node} | ${dut2_to_dut1_if2} | | ... | ${dut2_to_dut1_ip2} | ${ip_prefix} | | And Add Arp On Dut | ${dut1_node} | ${dut1_to_tg_if1} | | ... | ${tg_dut1_ip1} | ${tg_to_dut1_if1_mac} | vrf=${fib_table_1} | | And Add Arp On Dut | ${dut1_node} | ${dut1_to_dut2_if1} | | ... | ${dut2_to_dut1_ip1} | ${dut2_to_dut1_if1_mac} | vrf=${fib_table_1} | | And Add Arp On Dut | ${dut2_node} | ${dut2_to_tg_if1} | | ... | ${tg_dut2_ip1} | ${tg_to_dut2_if1_mac} | vrf=${fib_table_1} | | And Add Arp On Dut | ${dut2_node} | ${dut2_to_dut1_if1} | | ... | ${dut1_to_dut2_ip1} | ${dut1_to_dut2_if1_mac} | vrf=${fib_table_1} | | And Add Arp On Dut | ${dut1_node} | ${dut1_to_tg_if2} | | ... | ${tg_dut1_ip2} | ${tg_to_dut1_if2_mac} | vrf=${fib_table_2} | | And Add Arp On Dut | ${dut1_node} | ${dut1_to_dut2_if2} | | ... | ${dut2_to_dut1_ip2} | ${dut2_to_dut1_if2_mac} | vrf=${fib_table_2} | | And Add Arp On Dut | ${dut2_node} | ${dut2_to_tg_if2} | | ... | ${tg_dut2_ip2} | ${tg_to_dut2_if2_mac} | vrf=${fib_table_2} | | And Add Arp On Dut | ${dut2_node} | ${dut2_to_dut1_if2} | | ... | ${dut1_to_dut2_ip2} | ${dut1_to_dut2_if2_mac} | vrf=${fib_table_2} | | And Vpp Route Add | ${dut1_node} | ${tg_dut2_ip1} | ${ip_prefix} | | ... | ${dut2_to_dut1_ip1} | ${dut1_to_dut2_if1} | vrf=${fib_table_1} | | And Vpp Route Add | ${dut2_node} | ${tg_dut1_ip1} | ${ip_prefix} | | ... | ${dut1_to_dut2_ip1} | ${dut2_to_dut1_if1} | vrf=${fib_table_1} | | And Vpp Route Add | ${dut1_node} | ${tg_dut2_ip2} | ${ip_prefix} | | ... | ${dut2_to_dut1_ip2} | ${dut1_to_dut2_if2} | vrf=${fib_table_2} | | And Vpp Route Add | ${dut2_node} | ${tg_dut1_ip2} | ${ip_prefix} | | ... | ${dut1_to_dut2_ip2} | ${dut2_to_dut1_if2} | vrf=${fib_table_2}