--- /dev/null
+Overview\r
+========\r
+\r
+VPP Functional Test Topologies in VIRL\r
+--------------------------------------\r
+\r
+CSIT VPP functional tests are executed on virtualized topologies created using\r
+Virtual Internet Routing Lab (VIRL) simulation platform contributed by Cisco.\r
+VIRL runs on physical baremetal servers hosted by LF FD.io project. Majority\r
+of the tests are executed in the three node logical test topology - Traffic\r
+Generator (TG) node and two Systems Under Test (SUT) nodes connected in a\r
+loop. Some tests use two node logical test topology - TG node and SUT node.\r
+Both logical test topologies are shown in the figures below:::\r
+\r
+ +------------------------+ +------------------------+\r
+ | | | |\r
+ | +------------------+ | | +------------------+ |\r
+ | | <-----------------> | |\r
+ | | | | | | | |\r
+ | | DUT1 <-----------------> DUT2 | |\r
+ | +--^--^------------+ | | +------------^--^--+ |\r
+ | | | | | | | |\r
+ | | | SUT1 | | SUT2 | | |\r
+ +------------------------+ +------------------------+\r
+ | | | |\r
+ | | | |\r
+ | | +-----------+ | |\r
+ | +---------------> <---------------+ |\r
+ | | TG | |\r
+ +------------------> <------------------+\r
+ +-----------+\r
+\r
+ +------------------------+\r
+ | |\r
+ | +------------------+ |\r
+ +---------------> <--------------+\r
+ | | | | | |\r
+ | |------------> DUT1 <-----------+ |\r
+ | | | +--^--^------------+ | | |\r
+ | | | | | |\r
+ | | | SUT1 | | |\r
+ | | +------------------------+ | |\r
+ | | | |\r
+ | | | |\r
+ | | +-----------+ | |\r
+ | +---------------> <---------------+ |\r
+ | | TG | |\r
+ +------------------> <------------------+\r
+ +-----------+\r
+\r
+Virtual testbeds are created dynamically whenever a verification job is\r
+started triggered by the patch submission to gerrit and destroyed upon\r
+completion of all functional tests. During test execution, all nodes are\r
+reachable thru the MGMT network connected to every node via dedicated NICs and\r
+links (not shown above for clarity). Each node is a Virtual Machine and each\r
+connection that is drawn on the diagram is available for use in any test case.\r
+\r
+For test cases that require DUT (VPP) to communicate with VM over vhost-user\r
+interfaces, a nested VM is created on SUT1 and/or SUT2 for the duration of\r
+that particular test case only. DUT (VPP) test topology with VM is shown in\r
+the figure below including the applicable packet flow thru the VM (marked with\r
+``*``).::\r
+\r
+ +------------------------+ +------------------------+\r
+ | +----------+ | | +----------+ |\r
+ | | VM | | | | VM | |\r
+ | | ****** | | | | ****** | |\r
+ | +--^----^--+ | | +--^----^--+ |\r
+ | *| |* | | *| |* |\r
+ | +------v----v------+ | | +------v----v------+ |\r
+ | | * * |**|***********|**| * * | |\r
+ | | ***** *******<----------------->******* ***** | |\r
+ | | * DUT1 | | | | DUT2 * | |\r
+ | +--^---------------+ | | +---------------^--+ |\r
+ | *| | | |* |\r
+ | *| SUT1 | | SUT2 |* |\r
+ +------------------------+ +------------------^-----+\r
+ *| |*\r
+ *| |*\r
+ *| +-----------+ |*\r
+ *| | | |*\r
+ *+------------------> TG <------------------+*\r
+ ******************* | |********************\r
+ +-----------+\r
+\r
+VPP Functional Tests Overview\r
+-----------------------------\r
+\r
+Following VPP functional test areas are included in the CSIT |release| with\r
+results listed in this report:\r
+\r
+- **DHCP - Client and Proxy** - Dynamic Host Control Protocol Client and Proxy\r
+ for IPv4, IPv6.\r
+- **GRE Overlay Tunnels** - Generic Routing Encapsulation for IPv4.\r
+- **L2BD Ethernet Switching** - L2 Bridge-Domain switched-forwarding for\r
+ untagged Ethernet, dot1q and dot1ad tagged.\r
+- **L2XC Ethernet Switching** - L2 Cross-Connect switched-forwarding for\r
+ untagged Ethernet, dot1q and dot1ad tagged.\r
+- **LISP Overlay Tunnels** - Locator/ID Separation Protocol overlay tunnels and\r
+ locator/id mapping control.\r
+- **Softwire Tunnels** - IPv4-in-IPv6 softwire tunnels.\r
+- **Cop Address Security** - address white-list and black-list filtering for\r
+ IPv4, IPv6.\r
+- **IPSec - Tunnels and Transport** - IPSec tunnel and transport modes.\r
+- **IPv6 Routed-Forwarding** - IPv6 routed-forwarding, NS/ND, RA, ICMPv6.\r
+- **uRPF Source Security** - unicast Reverse Path Forwarding security.\r
+- **Tap Interface** - baseline Linux tap interface tests.\r
+- **Telemetry - IPFIX and SPAN** - IPFIX netflow statistics and SPAN port\r
+ mirroring.\r
+- **VRF Routed-Forwarding** - multi-context IPVPN routed-forwarding for IPv4,\r
+ IPv6.\r
+- **iACL Security** - ingress Access Control List security for IPv4, IPv6, MAC.\r
+- **IPv4 Routed-Forwarding** - IPv4 routed-forwarding, RPF, ARP, Proxy ARP,\r
+ ICMPv4.\r
+- **QoS Policer Metering** - ingress packet rate measuring and marking for IPv4,\r
+ IPv6.\r
+- **VLAN Tag Translation** - L2 VLAN tag translation 2to2, 2to1, 1to2, 1to1.\r
+- **VXLAN Overlay Tunnels** - VXLAN tunneling for L2-over-IP, for IPv4, IPv6.\r
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