docs: Rework the VPP progressive Tutorial.

Change-Id: If5b0d07ea90d978c6b1f11210a661876b7929653
Signed-off-by: John DeNisco <jdenisco@cisco.com>

1 files changed, 189 insertions, 0 deletions

diff --git a/docs/gettingstarted/progressivevpp/switching.rst b/docs/gettingstarted/progressivevpp/switching.rst
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+.. _switching:
+
+.. toctree::
+
+Switching
+=========
+
+Skills to be Learned
+----------------------
+
+#. Associate an interface with a bridge domain
+#. Create a loopback interaface
+#. Create a BVI (Bridge Virtual Interface) for a bridge domain
+#. Examine a bridge domain
+
+FD.io VPP command learned in this exercise
+--------------------------------------------
+
+#. `show
+   bridge <https://docs.fd.io/vpp/17.04/clicmd_src_vnet_l2.html#clicmd_show_bridge-domain>`__
+#. `show bridge
+   detail <https://docs.fd.io/vpp/17.04/clicmd_src_vnet_l2.html#clicmd_show_bridge-domain>`__
+#. `set int l2
+   bridge <https://docs.fd.io/vpp/17.04/clicmd_src_vnet_l2.html#clicmd_set_interface_l2_bridge>`__
+#. `show l2fib
+   verbose <https://docs.fd.io/vpp/17.04/clicmd_src_vnet_l2.html#clicmd_show_l2fib>`__
+
+Topology
+---------
+
+.. figure:: /_images/Switching_Topology.jpg
+   :alt: Switching Topology
+
+   Switching Topology
+
+Initial state
+---------------
+
+Unlike previous exercises, for this one you want to start tabula rasa.
+
+Note: You will lose all your existing config in your FD.io VPP instances!
+
+To clear existing config from previous exercises run:
+
+.. code-block:: console
+
+   $ ps -ef | grep vpp | awk '{print $2}'| xargs sudo kill
+   $ sudo ip link del dev vpp1host
+   $ # do the next command if you are cleaing up from this example
+   $ sudo ip link del dev vpp1vpp2
+
+Run FD.io VPP instances
+------------------------
+
+#. Run a vpp instance named **vpp1**
+#. Run a vpp instance named **vpp2**
+
+Connect vpp1 to host
+---------------------
+
+#. Create a veth with one end named vpp1host and the other named
+   vpp1out.
+#. Connect vpp1out to vpp1
+#. Add ip address 10.10.1.1/24 on vpp1host
+
+Connect vpp1 to vpp2
+---------------------
+
+#. Create a veth with one end named vpp1vpp2 and the other named
+   vpp2vpp1.
+#. Connect vpp1vpp2 to vpp1.
+#. Connect vpp2vpp1 to vpp2.
+
+Configure Bridge Domain on vpp1
+--------------------------------
+
+Check to see what bridge domains already exist, and select the first
+bridge domain number not in use:
+
+.. code-block:: console
+
+   vpp# show bridge-domain
+    ID   Index   Learning   U-Forwrd   UU-Flood   Flooding   ARP-Term     BVI-Intf   
+    0      0        off        off        off        off        off        local0    
+
+In the example above, there is bridge domain ID '0' already. Even though
+sometimes we might get feedback as below:
+
+.. code-block:: console
+
+   no bridge-domains in use
+
+the bridge domain ID '0' still exists, where no operations are
+supported. For instance, if we try to add host-vpp1out and host-vpp1vpp2
+to bridge domain ID 0, we will get nothing setup.
+
+.. code-block:: console
+
+   vpp# set int l2 bridge host-vpp1out 0
+   vpp# set int l2 bridge host-vpp1vpp2 0
+   vpp# show bridge-domain 0 detail
+   show bridge-domain: No operations on the default bridge domain are supported
+
+So we will create bridge domain 1 instead of playing with the default
+bridge domain ID 0.
+
+Add host-vpp1out to bridge domain ID 1
+
+.. code-block:: console
+
+   vpp# set int l2 bridge host-vpp1out 1
+
+Add host-vpp1vpp2 to bridge domain ID1
+
+.. code-block:: console
+
+   vpp# set int l2 bridge host-vpp1vpp2  1
+
+Examine bridge domain 1:
+
+.. code-block:: console
+
+    vpp# show bridge-domain 1 detail
+    BD-ID   Index   BSN  Age(min)  Learning  U-Forwrd  UU-Flood  Flooding  ARP-Term  BVI-Intf
+    1       1      0     off        on        on        on        on       off       N/A
+
+            Interface           If-idx ISN  SHG  BVI  TxFlood        VLAN-Tag-Rewrite
+        host-vpp1out            1     1    0    -      *                 none
+        host-vpp1vpp2           2     1    0    -      *                 none
+
+Configure loopback interface on vpp2
+-------------------------------------
+
+.. code-block:: console
+
+    vpp# create loopback interface
+    loop0
+
+Add the ip address 10.10.1.2/24 to vpp2 interface loop0. Set the state
+of interface loop0 on vpp2 to 'up'
+
+Configure bridge domain on vpp2
+--------------------------------
+
+Check to see the first available bridge domain ID (it will be 1 in this
+case)
+
+Add interface loop0 as a bridge virtual interface (bvi) to bridge domain
+1
+
+.. code-block:: console
+
+   vpp# set int l2 bridge loop0 1 bvi
+
+Add interface vpp2vpp1 to bridge domain 1
+
+.. code-block:: console
+
+   vpp# set int l2 bridge host-vpp2vpp1  1
+
+Examine the bridge domain and interfaces.
+
+Ping from host to vpp and vpp to host
+--------------------------------------
+
+#. Add trace on vpp1 and vpp2
+#. ping from host to 10.10.1.2
+#. Examine and clear trace on vpp1 and vpp2
+#. ping from vpp2 to 10.10.1.1
+#. Examine and clear trace on vpp1 and vpp2
+
+Examine l2 fib
+---------------
+
+.. code-block:: console
+
+    vpp# show l2fib verbose
+    Mac Address     BD Idx           Interface           Index  static  filter  bvi   Mac Age (min) 
+    de:ad:00:00:00:00    1            host-vpp1vpp2           2       0       0     0      disabled    
+    c2:f6:88:31:7b:8e    1            host-vpp1out            1       0       0     0      disabled    
+    2 l2fib entries
+
+.. code-block:: console
+
+    vpp# show l2fib verbose
+    Mac Address     BD Idx           Interface           Index  static  filter  bvi   Mac Age (min) 
+    de:ad:00:00:00:00    1                loop0               2       1       0     1      disabled    
+    c2:f6:88:31:7b:8e    1            host-vpp2vpp1           1       0       0     0      disabled    
+    2 l2fib entries