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-rw-r--r--docs/testing/user/configguide/trafficgen.rst4
1 files changed, 4 insertions, 0 deletions
diff --git a/docs/testing/user/configguide/trafficgen.rst b/docs/testing/user/configguide/trafficgen.rst
index 029247f2..33824486 100644
--- a/docs/testing/user/configguide/trafficgen.rst
+++ b/docs/testing/user/configguide/trafficgen.rst
@@ -791,6 +791,10 @@ It is neccesary for proper connection between Trex server and VSPERF.
cd trex-core/scripts/
./t-rex-64 -i
+**NOTE:** Please check your firewall settings at both DUT and T-Rex server.
+Firewall must allow a connection from DUT (VSPERF) to the T-Rex server running
+at TCP port 4501.
+
For additional information about Trex stateless mode see Trex stateless documentation:
https://trex-tgn.cisco.com/trex/doc/trex_stateless.html