NFVBENCH-187: Augment --l2-loopback command line option capabilities

[nfvbench.git] / docs / testing / user / userguide / readme.rst

diff --git a/docs/testing/user/userguide/readme.rst b/docs/testing/user/userguide/readme.rst
index 50175c3..f6cc153 100644 (file)
--- a/docs/testing/user/userguide/readme.rst
+++ b/docs/testing/user/userguide/readme.rst
@@ -78,15 +78,22 @@ NFVbench supports settings that involve externally staged packet paths with or w
 
 Direct L2 Loopback (Switch or wire loopback)
 --------------------------------------------
 
 Direct L2 Loopback (Switch or wire loopback)
 --------------------------------------------

-NFVbench supports benchmarking of pure L2 loopbacks (see "--l2-loopback vlan" option)
+NFVbench supports benchmarking of pure L2 loopbacks

 
 - Switch level loopback
 - Port to port wire loopback
 
 
 - Switch level loopback
 - Port to port wire loopback
 

-In this mode, NFVbench will take a vlan ID and send packets from each port to the other port
-(dest MAC set to the other port MAC) using the same VLAN ID on both ports.
+In this mode, NFVbench will send packets from each port to the other port
+(the destination MAC address is set to the other port MAC address).

 This can be useful for example to verify that the connectivity to the switch is working properly.
 
 This can be useful for example to verify that the connectivity to the switch is working properly.
 

+Such a test can be quickly run using the CLI ``--l2-loopback`` :ref:`option <adv-l2l-cli>`.
+
+For a typical test, packets will be VLAN tagged with the same ID on both ports.
+However, multiple L2 vlan tagged service chains are also allowed,
+which permits testing various configurations and the behavior of the bench itself.
+
+

 Traffic Generation
 ------------------
 
 Traffic Generation
 ------------------