Introduce new test case: symmetric service chain

JIRA: SFC-53

The goal is to verify that the traffic traverses the service chain, not only
in the uplink (client --> server) direction, but also in the downlink
(client <-- server) direction, which is the part that is not currently being
covered by other test cases.

Change-Id: I198a53e5afe3da1b397cee95627834856498b674
Signed-off-by: Juan Vidal <juan.vidal.allende@ericsson.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/sfc/tests/functest/README.sfc-test-3 b/sfc/tests/functest/README.sfc-test-3
new file mode 100644
index 00000000..865a7cc8
--- /dev/null
+++ b/sfc/tests/functest/README.sfc-test-3
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+### ODL-SFC TEST3 DESCRIPTION ###
+
+One client and one server are created using nova. The server will be running
+a web server on port 80.
+
+Then one Service Function (SF) is created using Tacker. This service function
+will be running a firewall that blocks the traffic in a specific port (e.g.
+33333). A symmetric service chain routing the traffic throught this SF will be
+created as well.
+
+1st check: The client is able to reach the server using a source port different
+from the one that the firewall blocks (e.g 22222), and the response gets back
+to the client.
+
+2nd check: The client is able to reach the server using the source port that
+the firewall blocks, but responses back from the server are blocked, as the
+symmetric service chain makes them go through the firewall that blocks on the
+destination port initially used as source port by the client (e.g. 33333).
+
+If the client is able to receive the response, it would be a symptom of the
+symmetric chain not working, as traffic would be flowing from server to client
+directly without traversing the SF.