test_spec: Adding vm2vm on separate hosts use case

The deployment scenario covers the use case of
traffic passing between two physical machines where VMs are hosted on
each physical machine.
JIRA: VSPERF-44

Change-Id: I74a507537587fea4eaa887a8d9fd27a40a8ce0e7
Signed-off-by: T V Rao <tv.rao@freescale.com>

diff --git a/test_spec/vswitchperf_ltd.md b/test_spec/vswitchperf_ltd.md
index a1ffd38..07d49dc 100755 (executable)
--- a/test_spec/vswitchperf_ltd.md
+++ b/test_spec/vswitchperf_ltd.md
@@ -306,6 +306,40 @@ The following represents possible deployments which can help to determine the pe
     +-----------------------------------------------------------------------------------------------------------+__|
 </code></pre>
 
+  - HOST 1(Physical port → virtual switch → VNF → virtual switch → Physical port) → HOST 2(Physical port → virtual switch → VNF → virtual switch → Physical port)
+
+<pre><code>
+
+ +--------------------------------------------+                 +------------------------------------------+
+ |   +---------------------------------+      |                 |    +--------------------------------+    |
+ |   |          Application            |      |                 |    |         Application            |    |
+ |   +----------------------------+----+      |                 |    +-------------------------+------+    |
+ |         ^                      |           |                 |           ^                  |           |
+ |         |                      v           |                 |           |                  v           |
+ | +-------+----------+  +------------------+ |                 | +---------+--------+  +----------------+ |
+ | | Logical port 0   |  | Logical port 1   | |                 | | Logical port 0   |  |Logical port 1  | |
+ +-+------------------+--+------------------+-+                 +-+------------------+--+------+---------+-+
+           ^                      |                                         ^                  |
+           |                      |                                         |                  |
+           |                      v                                         |                  v
+ +-+-------+----------+--+------------------+-+                 +-+---------+--------+--+----------------+-+
+ | | Logical port 0   |  |  Logical port 1  | |                 | | Logical port 0   |  | Logical port 1 | |
+ | +------------------+  +----------+-------+ |                 | +------------------+  +------+---------+ |
+ |          ^                       |         |                 |           ^                  |           |
+ |          |                       |         |                 |           |                  |           |
+ |          |       vswitch         v         |                 |           |     vswitch      v           |
+ | +--------+---------+  +------------------+ |                 | +---------+--------+  +----------------+ |
+ | |    phy port      |  |    phy port      | |                 | |  phy port        |  |  phy port      | |
+ +-+--------+---------+--+----------+-------+-+                 +-+---------+--------+--+------+---------+-+
+            ^                       +---------------------------------------+                  |
+            |                                                                                  v
+ +----------+----------------------------------------------------------------------------------+-----------+
+ |                                                                                                         |
+ |                                    traffic generator                                                    |
+ |                                                                                                         |
+ +---------------------------------------------------------------------------------------------------------+
+</code></pre>
+
 **Note:** For tests where the traffic generator and/or measurement receiver are implemented on VM and connected to the virtual switch through vNIC, the issues of shared resources and interactions between the measurement devices and the device under test must be considered.
 
  ####General Methodology: