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+.. This work is licensed under a Creative Commons Attribution 4.0 International
+.. License.
+.. http://creativecommons.org/licenses/by/4.0
+.. (c) OPNFV, Intel Corporation and others.
+
+*************************************
+Yardstick Test Case Description TC020
+*************************************
+
+.. _DPDKpktgen: https://github.com/Pktgen/Pktgen-DPDK/
+.. _rfc2544: https://www.ietf.org/rfc/rfc2544.txt
+
++-----------------------------------------------------------------------------+
+|Network Performance                                                          |
+|                                                                             |
++--------------+--------------------------------------------------------------+
+|test case id  | OPNFV_YARDSTICK_TC0020_Virtual Traffic Classifier            |
+|              | Instantiation Test                                           |
+|              |                                                              |
++--------------+--------------------------------------------------------------+
+|metric        | Failure                                                      |
+|              |                                                              |
++--------------+--------------------------------------------------------------+
+|test purpose  | To verify that a newly instantiated vTC is 'alive' and       |
+|              | functional and its instantiation is correctly supported by   |
+|              | the infrastructure.                                          |
+|              |                                                              |
++--------------+--------------------------------------------------------------+
+|configuration | file: opnfv_yardstick_tc020.yaml                             |
+|              |                                                              |
+|              | vnic_type: type of VNIC to be used.                          |
+|              |      Allowed values are:                                     |
+|              |           - normal: for default OvS port configuration       |
+|              |           - direct: for SR-IOV port configuration            |
+|              |      Default value: None                                     |
+|              |                                                              |
+|              | vtc_flavor: OpenStack flavor to be used for the vTC          |
+|              |      Default available values are: m1.small, m1.medium,      |
+|              |      and m1.large, but the user can create his/her own       |
+|              |      flavor and give it as input                             |
+|              |      Default value: None                                     |
+|              |                                                              |
+|              | vlan_sender: vlan tag of the network on which the vTC will   |
+|              |      receive traffic (VLAN Network 1).                       |
+|              |      Allowed values: range (1, 4096)                         |
+|              |                                                              |
+|              | vlan_receiver: vlan tag of the network on which the vTC      |
+|              |      will send traffic back to the packet generator          |
+|              |      (VLAN Network 2).                                       |
+|              |      Allowed values: range (1, 4096)                         |
+|              |                                                              |
+|              | default_net_name: neutron name of the defaul network that    |
+|              |      is used for access to the internet from the vTC         |
+|              |      (vNIC 1).                                               |
+|              |                                                              |
+|              | default_subnet_name: subnet name for vNIC1                   |
+|              |      (information available through Neutron).                |
+|              |                                                              |
+|              | vlan_net_1_name: Neutron Name for VLAN Network 1             |
+|              |      (information available through Neutron).                |
+|              |                                                              |
+|              | vlan_subnet_1_name: Subnet Neutron name for VLAN Network 1   |
+|              |      (information available through Neutron).                |
+|              |                                                              |
+|              | vlan_net_2_name: Neutron Name for VLAN Network 2             |
+|              |      (information available through Neutron).                |
+|              |                                                              |
+|              | vlan_subnet_2_name: Subnet Neutron name for VLAN Network 2   |
+|              |      (information available through Neutron).                |
+|              |                                                              |
++--------------+--------------------------------------------------------------+
+|test tool     | DPDK pktgen                                                  |
+|              |                                                              |
+|              | DPDK Pktgen is not part of a Linux distribution,             |
+|              | hence it needs to be installed by the user.                  |
+|              |                                                              |
++--------------+--------------------------------------------------------------+
+|references    | DPDKpktgen_                                                  |
+|              |                                                              |
+|              | ETSI-NFV-TST001                                              |
+|              |                                                              |
+|              | rfc2544_                                                     |
+|              |                                                              |
++--------------+--------------------------------------------------------------+
+|applicability | Test can be configured with different flavors, vNIC type     |
+|              | and packet sizes. Default values exist as specified above.   |
+|              | The vNIC type and flavor MUST be specified by the user.      |
+|              |                                                              |
++--------------+--------------------------------------------------------------+
+|pre-test      | The vTC has been successfully instantiated and configured.   |
+|              | The user has correctly assigned the values to the deployment |
+|              |  configuration parameters.                                   |
+|              |                                                              |
+|              | - Multicast traffic MUST be enabled on the network.          |
+|              |      The Data network switches need to be configured in      |
+|              |      order to manage multicast traffic.                      |
+|              |      Installation and configuration of smcroute is required  |
+|              |      before to run the test case.                            |
+|              |      (For further instructions please refer to the ApexLake  |
+|              |      documentation).                                         |
+|              | - In the case of SR-IOV vNICs use, SR-IOV compatible NICs    |
+|              |      must be used on the compute node.                       |
+|              | - Yarsdtick needs to be installed on a host connected to the |
+|              |      data network and the host must have 2 DPDK-compatible   |
+|              |      NICs. Proper configuration of DPDK and DPDK pktgen is   |
+|              |      required before to run the test case.                   |
+|              |      (For further instructions please refer to the ApexLake  |
+|              |      documentation).                                         |
+|              |                                                              |
++--------------+--------------------------------------------------------------+
+|test sequence | Description and expected results                             |
+|              |                                                              |
++--------------+--------------------------------------------------------------+
+|step 1        | The vTC is deployed, according to the configuration provided |
+|              | by the user.                                                 |
+|              |                                                              |
++--------------+--------------------------------------------------------------+
+|step 2        | The vTC is correctly deployed and configured as necessary.   |
+|              | The initialization script has been correctly executed and    |
+|              | the vTC is ready to receive and process the traffic.         |
+|              |                                                              |
++--------------+--------------------------------------------------------------+
+|step 3        | Test case is executed with the parameters specified by the   |
+|              | the user:                                                    |
+|              | - vTC flavor                                                 |
+|              | - vNIC type                                                  |
+|              | A constant rate traffic is sent to the vTC for 10 seconds.   |
+|              |                                                              |
++--------------+--------------------------------------------------------------+
+|step 4        | The vTC instance tags all the packets and sends them back to |
+|              | the packet generator for 10 seconds.                         |
+|              |                                                              |
+|              | The framework checks that the packet generator receives      |
+|              | back all the packets with the correct tag from the vTC.      |
+|              |                                                              |
++--------------+--------------------------------------------------------------+
+|test verdict  |  The vTC is deemed to be successfully instantiated if all    |
+|              |  packets are sent back with the right tag as requested,      |
+|              |  else it is deemed DoA (Dead on arrival)                     |
+|              |                                                              |
++--------------+--------------------------------------------------------------+