Virtual Topologies

CSIT VPP Device tests are executed in Physical containerized topologies created on demand using set of scripts hosted and developed under CSIT repository. It runs on physical baremetal servers hosted by LF FD.io project. Based on the packet path thru SUT Containers, two distinct logical topology types are used for VPP DUT data plane testing:

  1. vfNIC-to-vfNIC switching topologies.
  2. Nested-VM service switching topologies. (Planned to be added in rls1901)

vfNIC-to-vfNIC Switching

The simplest physical topology for software data plane application like VPP is vfNIC-to-vfNIC switching. Tested virtual topologies for 2-Node testbeds are shown in figures below.


SUT1 is Docker Container (running Ubuntu, depending on the test suite), TG is a Traffic Generator (running Ubuntu Container). SUTs run VPP SW application in Linux user-mode as a Device Under Test (DUT) within the container. TG runs Scapy SW application as a packet Traffic Generator. Network connectivity between SUTs and to TG is provided using virtual function of physical NICs.

Virtual topologies are created on-demand whenever a verification job is started (e.g. triggered by the gerrit patch submission) and destroyed upon completion of all functional tests. Each node is a container running on physical server. During the test execution, all nodes are reachable thru the Management (not shown above for clarity).

Functional Tests Coverage

CSIT-1810 includes following VPP functionality tested in virtual VM environment:

Functionality Description
IPv4 ICMPv4.
IPv6 ICMPv6.

Tests Naming

CSIT-1810 follows a common structured naming convention for all performance and system functional tests, introduced in CSIT-17.01.

The naming should be intuitive for majority of the tests. Complete description of CSIT test naming convention is provided on Test Naming.