4.3. Test Environment

CSIT functional tests are currently executed in FD.IO VIRL testbed. The physical VIRL testbed infrastructure consists of three VIRL hosts:

  • All hosts are Cisco UCS C240-M4 (2x Intel(R) Xeon(R) CPU E5-2699 v3 @2.30GHz, 18c, 512GB RAM)
  • tb4-virl1:
    • Status: Production
    • OS: Ubuntu 16.04.2
    • STD server version 0.10.32.16
    • UWM server version 0.10.32.16
  • tb4-virl2:
    • Status: Production
    • OS: Ubuntu 16.04.2
    • STD server version 0.10.32.16
    • UWM server version 0.10.32.16
  • tb4-virl3:
    • Status: Testing
    • OS: Ubuntu 16.04.2
    • STD server version 0.10.32.19
    • UWM server version 0.10.32.19

Whenever a patch is submitted to gerrit for review, parallel VIRL simulations are started to reduce the time of execution of all functional tests. The number of parallel VIRL simulations is equal to number of test groups defined by TEST_GROUPS variable in csit/bootstrap.sh file. The VIRL host to run VIRL simulation is selected based on least load algorithm per VIRL simulation.

Every VIRL simulation uses the same three-node - Traffic Generator (TG node) and two Systems Under Test (SUT1 and SUT2) - “double-ring” topology. The appropriate pre-built VPP packages built by Jenkins for the patch under review are then installed on the two SUTs, along with their /etc/vpp/startup.conf file, in all VIRL simulations.

4.3.1. SUT Configuration - VIRL Guest VM

Configurations of the SUT VMs is defined in VIRL topologies directory

  • List of SUT VM interfaces::

    <interface id="0" name="GigabitEthernet0/4/0"/>
<interface id="1" name="GigabitEthernet0/5/0"/>
<interface id="2" name="GigabitEthernet0/6/0"/>
<interface id="3" name="GigabitEthernet0/7/0"/>

  • Number of 2MB hugepages: 1024

  • Maximum number of memory map areas: 20000

  • Kernel Shared Memory Max: 2147483648 (vm.nr_hugepages * 2 * 1024 * 1024)

4.3.2. SUT Configuration - VIRL Guest OS Linux

In CSIT terminology, the VM operating system for both SUTs that VPP-18.04 release has been tested with, is the following:

  1. Ubuntu VIRL image

    This image implies Ubuntu 16.04.1 LTS, current as of yyyy-mm-dd (that is, package versions are those that would have been installed by a apt-get update, apt-get upgrade on that day), produced by CSIT disk image build scripts.

    The exact list of installed packages and their versions (including the Linux kernel package version) are included in VIRL ubuntu images lists.

    A replica of this VM image can be built by running the build.sh script in CSIT repository.

  2. CentOS VIRL image

    This image implies Centos 7.4-1711, current as of yyyy-mm-dd (that is, package versions are those that would have been installed by a yum update, yum upgrade on that day), produced by CSIT disk image build scripts.

    The exact list of installed packages and their versions (including the Linux kernel package version) are included in VIRL centos images lists.

    A replica of this VM image can be built by running the build.sh script in CSIT repository.

  3. Nested VM image

    In addition to the “main” VM image, tests which require VPP to communicate to a VM over a vhost-user interface, utilize a “nested” VM image.

    This “nested” VM is dynamically created and destroyed as part of a test case, and therefore the “nested” VM image is optimized to be small, lightweight and have a short boot time. The “nested” VM image is not built around any established Linux distribution, but is based on BuildRoot, a tool for building embedded Linux systems. Just as for the “main” image, scripts to produce an identical replica of the “nested” image are included in CSIT GIT repository, and the image can be rebuilt using the “build.sh” script at VIRL nested.

4.3.3. DUT Configuration - VPP

Every System Under Test runs VPP SW application in Linux user-mode as a Device Under Test (DUT) node.

DUT port configuration

Port configuration of DUTs is defined in topology file that is generated per VIRL simulation based on the definition stored in VIRL topologies directory.

Example of DUT nodes configuration::

DUT1:
    type: DUT
    host: "10.30.51.157"
    port: 22
    username: cisco
    honeycomb:
      user: admin
      passwd: admin
      port: 8183
      netconf_port: 2831
    priv_key: |
      -----BEGIN RSA PRIVATE KEY-----
      MIIEpgIBAAKCAQEAwUDlTpzSHpwLQotZOFS4AgcPNEWCnP1AB2hWFmvI+8Kah/gb
      v8ruZU9RqhPs56tyKzxbhvNkY4VbH5F1GilHZu3mLqzM4KfghMmaeMEjO1T7BYYd
      vuBfTvIluljfQ2vAlnYrDwn+ClxJk81m0pDgvrLEX4qVVh2sGh7UEkYy5r82DNa2
      4VjzPB1J/c8a9zP8FoZUhYIzF4FLvRMjUADpbMXgJMsGpaZLmz95ap0Eot7vb1Cc
      1LvF97iyBCrtIOSKRKA50ZhLGjMKmOwnYU+cP5718tbproDVi6VJOo7zeuXyetMs
      8YBl9kWblWG9BqP9jctFvsmi5G7hXgq1Y8u+DwIDAQABAoIBAQC/W4E0DHjLMny7
      0bvw2YKzD0Zw3fttdB94tkm4PdZv5MybooPnsAvLaXVV0hEdfVi5kzSWNl/LY/tN
      EP1BgGphc2QgB59/PPxGwFIjDCvUzlsZpynBHe+B/qh5ExNQcVvsIOqWI7DXlXaN
      0i/khOzmJ6HncRRah1spKimYRsaUUDskyg7q3QqMWVaqBbbMvLs/w7ZWd/zoDqCU
      MY/pCI6hkB3QbRo0OdiZLohphBl2ShABTwjvVyyKL5UA4jAEneJrhH5gWVLXnfgD
      p62W5CollKEYblC8mUkPxpP7Qo277zw3xaq+oktIZhc5SUEUd7nJZtNqVAHqkItW
      79VmpKyxAoGBAPfU+kqNPaTSvp+x1n5sn2SgipzDtgi9QqNmC4cjtrQQaaqI57SG
      OHw1jX8i7L2G1WvVtkHg060nlEVo5n65ffFOqeVBezLVJ7ghWI8U+oBiJJyQ4boD
      GJVNsoOSUQ0rtuGd9eVwfDk3ol9aCN0KK53oPfIYli29pyu4l095kg11AoGBAMef
      bPEMBI/2XmCPshLSwhGFl+dW8d+Klluj3CUQ/0vUlvma3dfBOYNsIwAgTP0iIUTg
      8DYE6KBCdPtxAUEI0YAEAKB9ry1tKR2NQEIPfslYytKErtwjAiqSi0heM6+zwEzu
      f54Z4oBhsMSL0jXoOMnu+NZzEc6EUdQeY4O+jhjzAoGBAIogC3dtjMPGKTP7+93u
      UE/XIioI8fWg9fj3sMka4IMu+pVvRCRbAjRH7JrFLkjbUyuMqs3Arnk9K+gbdQt/
      +m95Njtt6WoFXuPCwgbM3GidSmZwYT4454SfDzVBYScEDCNm1FuR+8ov9bFLDtGT
      D4gsngnGJj1MDFXTxZEn4nzZAoGBAKCg4WmpUPaCuXibyB+rZavxwsTNSn2lJ83/
      sYJGBhf/raiV/FLDUcM1vYg5dZnu37RsB/5/vqxOLZGyYd7x+Jo5HkQGPnKgNwhn
      g8BkdZIRF8uEJqxOo0ycdOU7n/2O93swIpKWo5LIiRPuqqzj+uZKnAL7vuVdxfaY
      qVz2daMPAoGBALgaaKa3voU/HO1PYLWIhFrBThyJ+BQSQ8OqrEzC8AnegWFxRAM8
      EqrzZXl7ACUuo1dH0Eipm41j2+BZWlQjiUgq5uj8+yzy+EU1ZRRyJcOKzbDACeuD
      BpWWSXGBI5G4CppeYLjMUHZpJYeX1USULJQd2c4crLJKb76E8gz3Z9kN
      -----END RSA PRIVATE KEY-----

    interfaces:
      port1:
        mac_address: "fa:16:3e:9b:89:52"
        pci_address: "0000:00:04.0"
        link: link1
      port2:
        mac_address: "fa:16:3e:7a:33:60"
        pci_address: "0000:00:05.0"
        link: link4
      port3:
        mac_address: "fa:16:3e:29:b7:ae"
        pci_address: "0000:00:06.0"
        link: link3
      port4:
        mac_address: "fa:16:3e:76:8d:ff"
        pci_address: "0000:00:07.0"
        link: link6
  DUT2:
    type: DUT
    host: "10.30.51.156"
    port: 22
    username: cisco
    honeycomb:
      user: admin
      passwd: admin
      port: 8183
      netconf_port: 2831
    priv_key: |
      -----BEGIN RSA PRIVATE KEY-----
      MIIEpgIBAAKCAQEAwUDlTpzSHpwLQotZOFS4AgcPNEWCnP1AB2hWFmvI+8Kah/gb
      v8ruZU9RqhPs56tyKzxbhvNkY4VbH5F1GilHZu3mLqzM4KfghMmaeMEjO1T7BYYd
      vuBfTvIluljfQ2vAlnYrDwn+ClxJk81m0pDgvrLEX4qVVh2sGh7UEkYy5r82DNa2
      4VjzPB1J/c8a9zP8FoZUhYIzF4FLvRMjUADpbMXgJMsGpaZLmz95ap0Eot7vb1Cc
      1LvF97iyBCrtIOSKRKA50ZhLGjMKmOwnYU+cP5718tbproDVi6VJOo7zeuXyetMs
      8YBl9kWblWG9BqP9jctFvsmi5G7hXgq1Y8u+DwIDAQABAoIBAQC/W4E0DHjLMny7
      0bvw2YKzD0Zw3fttdB94tkm4PdZv5MybooPnsAvLaXVV0hEdfVi5kzSWNl/LY/tN
      EP1BgGphc2QgB59/PPxGwFIjDCvUzlsZpynBHe+B/qh5ExNQcVvsIOqWI7DXlXaN
      0i/khOzmJ6HncRRah1spKimYRsaUUDskyg7q3QqMWVaqBbbMvLs/w7ZWd/zoDqCU
      MY/pCI6hkB3QbRo0OdiZLohphBl2ShABTwjvVyyKL5UA4jAEneJrhH5gWVLXnfgD
      p62W5CollKEYblC8mUkPxpP7Qo277zw3xaq+oktIZhc5SUEUd7nJZtNqVAHqkItW
      79VmpKyxAoGBAPfU+kqNPaTSvp+x1n5sn2SgipzDtgi9QqNmC4cjtrQQaaqI57SG
      OHw1jX8i7L2G1WvVtkHg060nlEVo5n65ffFOqeVBezLVJ7ghWI8U+oBiJJyQ4boD
      GJVNsoOSUQ0rtuGd9eVwfDk3ol9aCN0KK53oPfIYli29pyu4l095kg11AoGBAMef
      bPEMBI/2XmCPshLSwhGFl+dW8d+Klluj3CUQ/0vUlvma3dfBOYNsIwAgTP0iIUTg
      8DYE6KBCdPtxAUEI0YAEAKB9ry1tKR2NQEIPfslYytKErtwjAiqSi0heM6+zwEzu
      f54Z4oBhsMSL0jXoOMnu+NZzEc6EUdQeY4O+jhjzAoGBAIogC3dtjMPGKTP7+93u
      UE/XIioI8fWg9fj3sMka4IMu+pVvRCRbAjRH7JrFLkjbUyuMqs3Arnk9K+gbdQt/
      +m95Njtt6WoFXuPCwgbM3GidSmZwYT4454SfDzVBYScEDCNm1FuR+8ov9bFLDtGT
      D4gsngnGJj1MDFXTxZEn4nzZAoGBAKCg4WmpUPaCuXibyB+rZavxwsTNSn2lJ83/
      sYJGBhf/raiV/FLDUcM1vYg5dZnu37RsB/5/vqxOLZGyYd7x+Jo5HkQGPnKgNwhn
      g8BkdZIRF8uEJqxOo0ycdOU7n/2O93swIpKWo5LIiRPuqqzj+uZKnAL7vuVdxfaY
      qVz2daMPAoGBALgaaKa3voU/HO1PYLWIhFrBThyJ+BQSQ8OqrEzC8AnegWFxRAM8
      EqrzZXl7ACUuo1dH0Eipm41j2+BZWlQjiUgq5uj8+yzy+EU1ZRRyJcOKzbDACeuD
      BpWWSXGBI5G4CppeYLjMUHZpJYeX1USULJQd2c4crLJKb76E8gz3Z9kN
      -----END RSA PRIVATE KEY-----

    interfaces:
      port1:
        mac_address: "fa:16:3e:ad:6c:7d"
        pci_address: "0000:00:04.0"
        link: link2
      port2:
        mac_address: "fa:16:3e:94:a4:99"
        pci_address: "0000:00:05.0"
        link: link5
      port3:
        mac_address: "fa:16:3e:75:92:da"
        pci_address: "0000:00:06.0"
        link: link3
      port4:
        mac_address: "fa:16:3e:2c:b1:2a"
        pci_address: "0000:00:07.0"
        link: link6

VPP Version

VPP-18.04 release

VPP Installed Packages - Ubuntu

$ dpkg -l vpp\*
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name           Version       Architecture Description
+++-==============-=============-============-=================================================
ii  vpp            18.04-release amd64        Vector Packet Processing--executables
ii  vpp-dbg        18.04-release amd64        Vector Packet Processing--debug symbols
ii  vpp-dev        18.04-release amd64        Vector Packet Processing--development support
ii  vpp-dpdk-dkms  18.02-vpp1    amd64        DPDK Development Package for VPP - Kernel Modules
ii  vpp-lib        18.04-release amd64        Vector Packet Processing--runtime libraries
ii  vpp-plugins    18.04-release amd64        Vector Packet Processing--runtime plugins

VPP Installed Packages - Centos

$ rpm -qai vpp*
Name        : vpp
Version     : 18.04
Release     : release
Architecture: x86_64
Install Date: Fri 04 May 2018 02:47:36 AM EDT
Group       : Unspecified
Size        : 2311324
License     : ASL 2.0
Signature   : (none)
Source RPM  : vpp-18.04-release.src.rpm
Build Date  : Wed 25 Apr 2018 01:00:24 PM EDT
Build Host  : c29a51c12e88
Relocations : (not relocatable)
Summary     : Vector Packet Processing
Description :
This package provides VPP executables: vpp, vpp_api_test, vpp_json_test
vpp - the vector packet engine
vpp_api_test - vector packet engine API test tool
vpp_json_test - vector packet engine JSON test tool
Name        : vpp-lib
Version     : 18.04
Release     : release
Architecture: x86_64
Install Date: Fri 04 May 2018 02:47:36 AM EDT
Group       : System Environment/Libraries
Size        : 24949034
License     : ASL 2.0
Signature   : (none)
Source RPM  : vpp-18.04-release.src.rpm
Build Date  : Wed 25 Apr 2018 01:00:24 PM EDT
Build Host  : c29a51c12e88
Relocations : (not relocatable)
Summary     : VPP libraries
Description :
This package contains the VPP shared libraries, including:
vppinfra - foundation library supporting vectors, hashes, bitmaps, pools, and string formatting.
svm - vm library
vlib - vector processing library
vlib-api - binary API library
vnet -  network stack library
Name        : vpp-selinux-policy
Version     : 18.04
Release     : release
Architecture: x86_64
Install Date: Fri 04 May 2018 02:47:35 AM EDT
Group       : System Environment/Base
Size        : 86170
License     : ASL 2.0
Signature   : (none)
Source RPM  : vpp-18.04-release.src.rpm
Build Date  : Wed 25 Apr 2018 01:00:24 PM EDT
Build Host  : c29a51c12e88
Relocations : (not relocatable)
Summary     : VPP Security-Enhanced Linux (SELinux) policy
Description :
This package contains a tailored VPP SELinux policy
Name        : vpp-devel
Version     : 18.04
Release     : release
Architecture: x86_64
Install Date: Fri 04 May 2018 02:47:38 AM EDT
Group       : Development/Libraries
Size        : 10632218
License     : ASL 2.0
Signature   : (none)
Source RPM  : vpp-18.04-release.src.rpm
Build Date  : Wed 25 Apr 2018 01:00:24 PM EDT
Build Host  : c29a51c12e88
Relocations : (not relocatable)
Summary     : VPP header files, static libraries
Description :
This package contains the header files for VPP.
Install this package if you want to write a
program for compilation and linking with vpp lib.
vlib
vlibmemory
vnet - devices, classify, dhcp, ethernet flow, gre, ip, etc.
vpp-api
vppinfra
Name        : vpp-plugins
Version     : 18.04
Release     : release
Architecture: x86_64
Install Date: Fri 04 May 2018 02:47:37 AM EDT
Group       : System Environment/Libraries
Size        : 44145968
License     : ASL 2.0
Signature   : (none)
Source RPM  : vpp-18.04-release.src.rpm
Build Date  : Wed 25 Apr 2018 01:00:24 PM EDT
Build Host  : c29a51c12e88
Relocations : (not relocatable)
Summary     : Vector Packet Processing--runtime plugins
Description :
This package contains VPP plugins

VPP Startup Configuration

VPP startup configuration is common for all test cases except test cases related to SW Crypto device.

Default

$ cat /etc/vpp/startup.conf
unix {
  nodaemon
  log /var/log/vpp/vpp.log
  full-coredump
  cli-listen /run/vpp/cli.sock
  gid vpp
}

api-trace {
## This stanza controls binary API tracing. Unless there is a very strong reason,
## please leave this feature enabled.
  on
## Additional parameters:
##
## To set the number of binary API trace records in the circular buffer, configure nitems
##
## nitems <nnn>
##
## To save the api message table decode tables, configure a filename. Results in /tmp/<filename>
## Very handy for understanding api message changes between versions, identifying missing
## plugins, and so forth.
##
## save-api-table <filename>
}

api-segment {
  gid vpp
}

cpu {
    ## In the VPP there is one main thread and optionally the user can create worker(s)
    ## The main thread and worker thread(s) can be pinned to CPU core(s) manually or automatically

    ## Manual pinning of thread(s) to CPU core(s)

    ## Set logical CPU core where main thread runs
    # main-core 1

    ## Set logical CPU core(s) where worker threads are running
    # corelist-workers 2-3,18-19

    ## Automatic pinning of thread(s) to CPU core(s)

    ## Sets number of CPU core(s) to be skipped (1 ... N-1)
    ## Skipped CPU core(s) are not used for pinning main thread and working thread(s).
    ## The main thread is automatically pinned to the first available CPU core and worker(s)
    ## are pinned to next free CPU core(s) after core assigned to main thread
    # skip-cores 4

    ## Specify a number of workers to be created
    ## Workers are pinned to N consecutive CPU cores while skipping "skip-cores" CPU core(s)
    ## and main thread's CPU core
    # workers 2

    ## Set scheduling policy and priority of main and worker threads

    ## Scheduling policy options are: other (SCHED_OTHER), batch (SCHED_BATCH)
    ## idle (SCHED_IDLE), fifo (SCHED_FIFO), rr (SCHED_RR)
    # scheduler-policy fifo

    ## Scheduling priority is used only for "real-time policies (fifo and rr),
    ## and has to be in the range of priorities supported for a particular policy
    # scheduler-priority 50
}

# dpdk {
    ## Change default settings for all intefaces
    # dev default {
        ## Number of receive queues, enables RSS
        ## Default is 1
        # num-rx-queues 3

        ## Number of transmit queues, Default is equal
        ## to number of worker threads or 1 if no workers treads
        # num-tx-queues 3

        ## Number of descriptors in transmit and receive rings
        ## increasing or reducing number can impact performance
        ## Default is 1024 for both rx and tx
        # num-rx-desc 512
        # num-tx-desc 512

        ## VLAN strip offload mode for interface
        ## Default is off
        # vlan-strip-offload on
    # }

    ## Whitelist specific interface by specifying PCI address
    # dev 0000:02:00.0

    ## Whitelist specific interface by specifying PCI address and in
    ## addition specify custom parameters for this interface
    # dev 0000:02:00.1 {
    #       num-rx-queues 2
    # }

    ## Specify bonded interface and its slaves via PCI addresses
    ##
    ## Bonded interface in XOR load balance mode (mode 2) with L3 and L4 headers
    # vdev eth_bond0,mode=2,slave=0000:02:00.0,slave=0000:03:00.0,xmit_policy=l34
    # vdev eth_bond1,mode=2,slave=0000:02:00.1,slave=0000:03:00.1,xmit_policy=l34
    ##
    ## Bonded interface in Active-Back up mode (mode 1)
    # vdev eth_bond0,mode=1,slave=0000:02:00.0,slave=0000:03:00.0
    # vdev eth_bond1,mode=1,slave=0000:02:00.1,slave=0000:03:00.1

    ## Change UIO driver used by VPP, Options are: igb_uio, vfio-pci,
    ## uio_pci_generic or auto (default)
    # uio-driver vfio-pci

    ## Disable mutli-segment buffers, improves performance but
    ## disables Jumbo MTU support
    # no-multi-seg

    ## Increase number of buffers allocated, needed only in scenarios with
    ## large number of interfaces and worker threads. Value is per CPU socket.
    ## Default is 16384
    # num-mbufs 128000

    ## Change hugepages allocation per-socket, needed only if there is need for
    ## larger number of mbufs. Default is 256M on each detected CPU socket
    # socket-mem 2048,2048

    ## Disables UDP / TCP TX checksum offload. Typically needed for use
    ## faster vector PMDs (together with no-multi-seg)
    # no-tx-checksum-offload
# }


# plugins {
    ## Adjusting the plugin path depending on where the VPP plugins are
    #       path /home/bms/vpp/build-root/install-vpp-native/vpp/lib64/vpp_plugins

    ## Disable all plugins by default and then selectively enable specific plugins
    # plugin default { disable }
    # plugin dpdk_plugin.so { enable }
    # plugin acl_plugin.so { enable }

    ## Enable all plugins by default and then selectively disable specific plugins
    # plugin dpdk_plugin.so { disable }
    # plugin acl_plugin.so { disable }
# }

    ## Alternate syntax to choose plugin path
    # plugin_path /home/bms/vpp/build-root/install-vpp-native/vpp/lib64/vpp_plugins

SW Crypto Device

$ cat /etc/vpp/startup.conf
unix
{
  cli-listen /run/vpp/cli.sock
  gid vpp
  nodaemon
  full-coredump
  log /tmp/vpp.log
}
api-segment
{
  gid vpp
}
dpdk
{
  vdev cryptodev_aesni_gcm_pmd,socket_id=0
  vdev cryptodev_aesni_mb_pmd,socket_id=0
}

4.3.4. TG Configuration

Traffic Generator node is VM running the same OS Linux as SUTs. Ports of this VM are used as source (Tx) and destination (Rx) ports for the traffic.

Traffic scripts of test cases are executed on this VM.

TG VM configuration

Configuration of the TG VMs is defined in VIRL topologies directory.

/csit/resources/tools/virl/topologies/double-ring-nested.xenial.virl

  • List of TG VM interfaces::

    <interface id="0" name="eth1"/>
<interface id="1" name="eth2"/>
<interface id="2" name="eth3"/>
<interface id="3" name="eth4"/>
<interface id="4" name="eth5"/>
<interface id="5" name="eth6"/>

TG node port configuration

Port configuration of TG is defined in topology file that is generated per VIRL simulation based on the definition stored in VIRL topologies directory.

Example of TG node configuration::

TG:
    type: TG
    host: "10.30.51.155"
    port: 22
    username: cisco
    priv_key: |
      -----BEGIN RSA PRIVATE KEY-----
      MIIEpgIBAAKCAQEAwUDlTpzSHpwLQotZOFS4AgcPNEWCnP1AB2hWFmvI+8Kah/gb
      v8ruZU9RqhPs56tyKzxbhvNkY4VbH5F1GilHZu3mLqzM4KfghMmaeMEjO1T7BYYd
      vuBfTvIluljfQ2vAlnYrDwn+ClxJk81m0pDgvrLEX4qVVh2sGh7UEkYy5r82DNa2
      4VjzPB1J/c8a9zP8FoZUhYIzF4FLvRMjUADpbMXgJMsGpaZLmz95ap0Eot7vb1Cc
      1LvF97iyBCrtIOSKRKA50ZhLGjMKmOwnYU+cP5718tbproDVi6VJOo7zeuXyetMs
      8YBl9kWblWG9BqP9jctFvsmi5G7hXgq1Y8u+DwIDAQABAoIBAQC/W4E0DHjLMny7
      0bvw2YKzD0Zw3fttdB94tkm4PdZv5MybooPnsAvLaXVV0hEdfVi5kzSWNl/LY/tN
      EP1BgGphc2QgB59/PPxGwFIjDCvUzlsZpynBHe+B/qh5ExNQcVvsIOqWI7DXlXaN
      0i/khOzmJ6HncRRah1spKimYRsaUUDskyg7q3QqMWVaqBbbMvLs/w7ZWd/zoDqCU
      MY/pCI6hkB3QbRo0OdiZLohphBl2ShABTwjvVyyKL5UA4jAEneJrhH5gWVLXnfgD
      p62W5CollKEYblC8mUkPxpP7Qo277zw3xaq+oktIZhc5SUEUd7nJZtNqVAHqkItW
      79VmpKyxAoGBAPfU+kqNPaTSvp+x1n5sn2SgipzDtgi9QqNmC4cjtrQQaaqI57SG
      OHw1jX8i7L2G1WvVtkHg060nlEVo5n65ffFOqeVBezLVJ7ghWI8U+oBiJJyQ4boD
      GJVNsoOSUQ0rtuGd9eVwfDk3ol9aCN0KK53oPfIYli29pyu4l095kg11AoGBAMef
      bPEMBI/2XmCPshLSwhGFl+dW8d+Klluj3CUQ/0vUlvma3dfBOYNsIwAgTP0iIUTg
      8DYE6KBCdPtxAUEI0YAEAKB9ry1tKR2NQEIPfslYytKErtwjAiqSi0heM6+zwEzu
      f54Z4oBhsMSL0jXoOMnu+NZzEc6EUdQeY4O+jhjzAoGBAIogC3dtjMPGKTP7+93u
      UE/XIioI8fWg9fj3sMka4IMu+pVvRCRbAjRH7JrFLkjbUyuMqs3Arnk9K+gbdQt/
      +m95Njtt6WoFXuPCwgbM3GidSmZwYT4454SfDzVBYScEDCNm1FuR+8ov9bFLDtGT
      D4gsngnGJj1MDFXTxZEn4nzZAoGBAKCg4WmpUPaCuXibyB+rZavxwsTNSn2lJ83/
      sYJGBhf/raiV/FLDUcM1vYg5dZnu37RsB/5/vqxOLZGyYd7x+Jo5HkQGPnKgNwhn
      g8BkdZIRF8uEJqxOo0ycdOU7n/2O93swIpKWo5LIiRPuqqzj+uZKnAL7vuVdxfaY
      qVz2daMPAoGBALgaaKa3voU/HO1PYLWIhFrBThyJ+BQSQ8OqrEzC8AnegWFxRAM8
      EqrzZXl7ACUuo1dH0Eipm41j2+BZWlQjiUgq5uj8+yzy+EU1ZRRyJcOKzbDACeuD
      BpWWSXGBI5G4CppeYLjMUHZpJYeX1USULJQd2c4crLJKb76E8gz3Z9kN
      -----END RSA PRIVATE KEY-----

    interfaces:
      port3:
        mac_address: "fa:16:3e:b9:e1:27"
        pci_address: "0000:00:06.0"
        link: link1
        driver: virtio-pci
      port4:
        mac_address: "fa:16:3e:e9:c8:68"
        pci_address: "0000:00:07.0"
        link: link4
        driver: virtio-pci
      port5:
        mac_address: "fa:16:3e:e8:d3:47"
        pci_address: "0000:00:08.0"
        link: link2
        driver: virtio-pci
      port6:
        mac_address: "fa:16:3e:cf:ca:58"
        pci_address: "0000:00:09.0"
        link: link5
        driver: virtio-pci

Traffic generator

Functional tests utilize Scapy as a traffic generator. There was used Scapy v2.3.1 for VPP-18.04 release tests.