test_spec: LTD: Add Caution for Scaleability Address Time-out.

LTD.Scalability.RFC2544.0PacketLoss needs to add the caution that
all flows must be learned before running Throughput testing,
and no flows can be allowed to time-out during the test.

JIRA: VSPERF-108

Change-Id: I95ae20a978b7af660b358450e67ce60939b0b7c1
Signed-off-by: Al Morton <acmorton@att.com>
Reviewed-by: Maryam Tahhan <maryam.tahhan@intel.com>
Reviewed-by: Billy O'Mahony<billy.o.mahony@intel.com>
Reviewed-by: Gene Snider <eugene.snider@huawei.com>

1 files changed, 11 insertions, 1 deletions

diff --git a/docs/to-be-reorganized/vswitchperf_ltd.rst b/docs/to-be-reorganized/vswitchperf_ltd.rst
index 4e194d0c..33162bf4 100755
--- a/docs/to-be-reorganized/vswitchperf_ltd.rst
+++ b/docs/to-be-reorganized/vswitchperf_ltd.rst
@@ -1701,7 +1701,17 @@ Test ID: LTD.Scalability.RFC2544.0PacketLoss
     -  64,000
     -  Max supported number of flows.
 
-    The maximum 0% packet loss throughput should be determined in a manner
+    This test will be conducted under two conditions following the
+    establishment of all flows as required by RFC 2544, regarding the flow
+    expiration time-out:
+
+    1) The time-out never expires during each trial.
+
+    2) The time-out expires for all flows periodically. This would require a
+    short time-out compared with flow re-appearance for a small number of
+    flows, and may not be possible for all flow conditions.
+
+    The maximum 0% packet loss Throughput should be determined in a manner
     identical to LTD.Throughput.RFC2544.PacketLossRatio.
 
     **Expected Result**: