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+.. _interface:
+
+.. toctree::
+
+Interface
+=========
+
+VPP command learned in this exercise
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+#. `create host-interface <https://docs.fd.io/vpp/17.04/clicmd_src_vnet_devices_af_packet.html#clicmd_create_host-interface>`_
+#. `set int state <https://docs.fd.io/vpp/17.04/clicmd_src_vnet.html#clicmd_set_interface_state>`_
+#. `set int ip address <https://docs.fd.io/vpp/17.04/clicmd_src_vnet_ip.html#clicmd_set_interface_ip_address>`_
+#. `show hardware <https://docs.fd.io/vpp/17.04/clicmd_src_vnet.html#clicmd_show_hardware-interfaces>`_
+#. `show int <https://docs.fd.io/vpp/17.04/clicmd_src_vnet.html#clicmd_show_interfaces>`_
+#. `show int addr <https://docs.fd.io/vpp/17.04/clicmd_src_vnet.html#clicmd_show_interfaces>`_
+#. `trace add <https://docs.fd.io/vpp/17.04/clicmd_src_vlib.html#clicmd_trace_add>`_
+#. `clear trace <https://docs.fd.io/vpp/17.04/clicmd_src_vlib.html#clicmd_clear_trace>`_
+#. `ping <https://docs.fd.io/vpp/17.04/clicmd_src_vnet_ip.html#clicmd_ping>`_
+#. `show ip arp <https://docs.fd.io/vpp/17.04/clicmd_src_vnet_ethernet.html#clicmd_show_ip_arp>`_
+#. `show ip fib <https://docs.fd.io/vpp/17.04/clicmd_src_vnet_fib.html#clicmd_show_ip_fib>`_
+
+Topology
+~~~~~~~~
+
+.. figure:: /_images/Create_Interface_Topology.jpg
+ :alt: Figure: Create Interface Topology
+
+ Figure: Create Interface Topology
+
+Initial State
+~~~~~~~~~~~~~
+
+The initial state here is presumed to be the final state from the
+exercise `VPP Basics <VPP/Progressive_VPP_Tutorial#Exercise:_vpp_basics>`__
+
+Create veth interfaces on host
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+In Linux, there is a type of interface call 'veth'. Think of a 'veth'
+interface as being an interface that has two ends to it (rather than
+one).
+
+Create a veth interface with one end named **vpp1out** and the other
+named **vpp1host**
+
+.. code-block:: console
+
+ $ sudo ip link add name vpp1out type veth peer name vpp1host
+
+Turn up both ends:
+
+.. code-block:: console
+
+ $ sudo ip link set dev vpp1out up
+ $ sudo ip link set dev vpp1host up
+
+Assign an IP address
+~~~~~~~~~~~~~~~~~~~~
+
+.. code-block:: console
+
+ $ sudo ip addr add 10.10.1.1/24 dev vpp1host
+
+Display the result:
+
+.. code-block:: console
+
+ $ sudo ip addr show vpp1host
+ 5: vpp1host@vpp1out: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
+ link/ether e2:0f:1e:59:ec:f7 brd ff:ff:ff:ff:ff:ff
+ inet 10.10.1.1/24 scope global vpp1host
+ valid_lft forever preferred_lft forever
+ inet6 fe80::e00f:1eff:fe59:ecf7/64 scope link
+ valid_lft forever preferred_lft forever
+
+Create vpp host-interface
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Create a host interface attached to **vpp1out**.
+
+.. code-block:: console
+
+ vpp# create host-interface name vpp1out
+ host-vpp1out
+
+Confirm the interface:
+
+.. code-block:: console
+
+ vpp# show hardware
+ Name Idx Link Hardware
+ host-vpp1out 1 up host-vpp1out
+ Ethernet address 02:fe:d9:75:d5:b4
+ Linux PACKET socket interface
+ local0 0 down local0
+ local
+
+Turn up the interface:
+
+.. code-block:: console
+
+ vpp# set int state host-vpp1out up
+
+Confirm the interface is up:
+
+.. code-block:: console
+
+ vpp# show int
+ Name Idx State MTU (L3/IP4/IP6/MPLS) Counter Count
+ host-vpp1out 1 up 9000/0/0/0
+ local0 0 down 0/0/0/0
+
+Assign ip address 10.10.1.2/24
+
+.. code-block:: console
+
+ vpp# set int ip address host-vpp1out 10.10.1.2/24
+
+Confirm the ip address is assigned:
+
+.. code-block:: console
+
+ vpp# show int addr
+ host-vpp1out (up):
+ L3 10.10.1.2/24
+ local0 (dn):