Configuring ns-3
^^^^^^^^^^^^^^^^
-**Option** ``ns3/TcpModel`` **Default:** "default" (ns-3 default)
+**Option** ``ns3/NetworkModel`` **Default:** "default" (ns-3 default TCP)
-When using ns-3, there is an extra item ``ns3/TcpModel``, corresponding
-to the ``ns3::TcpL4Protocol::SocketType`` configuration item in
-ns-3. The only valid values (enforced on the SimGrid side) are
-'default' (no change to the ns-3 configuration), 'NewReno' or 'Cubic'.
+When using ns-3, the item ``ns3/NetworkModel`` can be used to switch between TCP or UDP, and switch the used TCP variante. If
+the item is left unchanged, ns-3 uses the default TCP implementation. With a value of "UDP", ns-3 is set to use UDP instead.
+With the value of either 'NewReno' or 'Cubic', the ``ns3::TcpL4Protocol::SocketType`` configuration item in ns-3 is set to the
+corresponding protocol.
**Option** ``ns3/seed`` **Default:** "" (don't set the seed in ns-3)
select the decision logic either of the OpenMPI or the MPICH libraries. (By
default SMPI uses naive version of collective operations.)
-Each collective operation can be manually selected with a
-``smpi/collective_name:algo_name``. Available algorithms are listed in
-:ref:`SMPI_use_colls`.
-
-.. TODO:: All available collective algorithms will be made available
- via the ``smpirun --help-coll`` command.
+Each collective operation can be manually selected with a ``smpi/collective_name:algo_name``. For example, if you want to use
+the Bruck algorithm for the Alltoall algorithm, you should use ``--cfg=smpi/alltoall:bruck`` on the command-line of smpirun. The
+reference of all available algorithms are listed in :ref:`SMPI_use_colls`, and you can get the full list implemented in your
+version using ``smpirun --help-coll``.
.. _cfg=smpi/barrier-collectives:
