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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, Huawei Technologies Co.,Ltd and others.
+
+*************************************
+Yardstick Test Case Description TC043
+*************************************
+
+.. _cirros-image: https://download.cirros-cloud.net
+
++-----------------------------------------------------------------------------+
+|Network Latency Between NFVI Nodes |
+| |
++--------------+--------------------------------------------------------------+
+|test case id | OPNFV_YARDSTICK_TC043_Latency_between_ |
+| | NFVI_nodes_measurements |
++--------------+--------------------------------------------------------------+
+|metric | RTT, Round Trip Time |
+| | |
++--------------+--------------------------------------------------------------+
+|test purpose | To do a basic verification that network latency is within |
+| | acceptable boundaries when packets travel between different |
+| | nodes. |
+| | |
++--------------+--------------------------------------------------------------+
+|configuration | file: opnfv_yardstick_tc043.yaml |
+| | |
+| | Packet size 100 bytes. Total test duration 600 seconds. |
+| | One ping each 10 seconds. SLA RTT is set to maximum 10 ms. |
+| | |
++--------------+--------------------------------------------------------------+
+|test tool | ping |
+| | |
+| | Ping is normally part of any Linux distribution, hence it |
+| | doesn't need to be installed. It is also part of the |
+| | Yardstick Docker image. |
+| | |
++--------------+--------------------------------------------------------------+
+|references | Ping man page |
+| | |
+| | ETSI-NFV-TST001 |
+| | |
++--------------+--------------------------------------------------------------+
+|applicability | Test case can be configured with different packet sizes, |
+| | burst sizes, ping intervals and test duration. |
+| | SLA is optional. The SLA in this test case serves as an |
+| | example. Considerably lower RTT is expected, and |
+| | also normal to achieve in balanced L2 environments. However, |
+| | to cover most configurations, both bare metal and fully |
+| | virtualized ones, this value should be possible to achieve |
+| | and acceptable for black box testing. Many real time |
+| | applications start to suffer badly if the RTT time is higher |
+| | than this. Some may suffer bad also close to this RTT, while |
+| | others may not suffer at all. It is a compromise that may |
+| | have to be tuned for different configuration purposes. |
+| | |
++--------------+--------------------------------------------------------------+
+|pre_test | Each pod node must have ping included in it. |
+|conditions | |
+| | |
++--------------+--------------------------------------------------------------+
+|test sequence | description and expected result |
+| | |
++--------------+--------------------------------------------------------------+
+|step 1 | The pod is available. Two nodes as server and client. |
+| | Ping is invoked and logs are produced and stored. |
+| | |
+| | Result: Logs are stored. |
+| | |
++--------------+--------------------------------------------------------------+
+|test verdict | Test should not PASS if any RTT is above the optional SLA |
+| | value, or if there is a test case execution problem. |
+| | |
++--------------+--------------------------------------------------------------+