test_spec: Note need for 3 test ports in RFC2889 address/cache

The RFC 2889 Address Learning and Cache Capacity tests require
a listening port to check for flooded frames.

JIRA: VSPERF-74

Change-Id: I7b4d2461e819d01d642c9c4d95b938dfbe056f2c
Signed-off-by: Al Morton <acmorton@att.com>
Reviewed-by: Maryam Tahhan <maryam.tahhan@intel.com>

diff --git a/docs/to-be-reorganized/vswitchperf_ltd.rst b/docs/to-be-reorganized/vswitchperf_ltd.rst
index d4d6178..ccba213 100644 (file)
--- a/docs/to-be-reorganized/vswitchperf_ltd.rst
+++ b/docs/to-be-reorganized/vswitchperf_ltd.rst
@@ -443,6 +443,11 @@ Physical port → vSwitch → VNF → vSwitch → VNF → vSwitch → physical p
 diagram above (with 2 sending and 2 receiving ports, though all ports
 could be used bi-directionally).
 
+**Note:** When Deployment Scenarios are used in RFC 2889 address learning
+or cache capacity testing, an additional port from the vSwitch must be
+connected to the test device. This port is used to listen for flooded
+frames.
+
 2.2.3 General Methodology:
 --------------------------
 To establish the baseline performance of the virtual switch, tests would
@@ -1544,7 +1549,7 @@ Test ID: LTD.Throughput.RFC2889.AddressCachingCapacity
 
     **Deployment scenario**:
 
-    -  Physical → virtual switch → physical.
+    -  Physical → virtual switch → 2 x physical (one receiving, one listening).
 
 Test ID: LTD.Throughput.RFC2889.AddressLearningRate
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -1568,7 +1573,7 @@ Test ID: LTD.Throughput.RFC2889.AddressLearningRate
     learning rate can be obtained.
 
     **Expected Result**: It may be worthwhile to report the behaviour when
-    operating beyond address capacity - some DUTS may be more friendly to
+    operating beyond address capacity - some DUTs may be more friendly to
     new addresses than others.
 
     **Metrics collected**:
@@ -1579,7 +1584,7 @@ Test ID: LTD.Throughput.RFC2889.AddressLearningRate
 
     **Deployment scenario**:
 
-    -  Physical → virtual switch → physical.
+    -  Physical → virtual switch → 2 x physical (one receiving, one listening).
 
 Test ID: LTD.Throughput.RFC2889.ErrorFramesFiltering
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^