docs: Add VPP inside the Cloud

This commit updates the VPP docs, adding the  VPP deployment and configuration inside the cloud

Change-Id: I97322deb57f0dfb1aa46cca301adbc91ce4a19f6
Signed-off-by: Francesco Spinelli <francescospinelli94@live.it>

9 files changed, 805 insertions, 4 deletions

diff --git a/docs/_images/Connecting_VPC.svg b/docs/_images/Connecting_VPC.svg
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+      </g>
+      <g id="Graphic_11">
+        <path d="M 139.5 300 L 319 300 C 346.61424 300 369 322.38576 369 350 L 369 587 C 369 614.61424 346.61424 637 319 637 L 139.5 637 C 111.88576 637 89.5 614.61424 89.5 587 L 89.5 350 C 89.5 322.38576 111.88576 300 139.5 300 Z" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="4"/>
+        <text transform="translate(94.5 305)" fill="black">
+          <tspan font-family="Helvetica Neue" font-size="36" font-weight="400" fill="black" x="0" y="34">   VM</tspan>
+        </text>
+      </g>
+      <g id="Graphic_14">
+        <path d="M 692.5 300 L 974.5 300 C 1002.1142 300 1024.5 322.38576 1024.5 350 L 1024.5 587 C 1024.5 614.61424 1002.1142 637 974.5 637 L 692.5 637 C 664.8858 637 642.5 614.61424 642.5 587 L 642.5 350 C 642.5 322.38576 664.8858 300 692.5 300 Z" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="4"/>
+        <text transform="translate(647.5 305)" fill="black">
+          <tspan font-family="Helvetica Neue" font-size="36" font-weight="400" fill="black" x="151.674" y="34">VPP</tspan>
+        </text>
+      </g>
+      <g id="Graphic_16">
+        <path d="M 260.5 382 L 301 382 C 306.52285 382 311 386.47715 311 392 L 311 567 C 311 572.52285 306.52285 577 301 577 L 260.5 577 C 254.97715 577 250.5 572.52285 250.5 567 L 250.5 392 C 250.5 386.47715 254.97715 382 260.5 382 Z" fill="#ab7942"/>
+        <path d="M 260.5 382 L 301 382 C 306.52285 382 311 386.47715 311 392 L 311 567 C 311 572.52285 306.52285 577 301 577 L 260.5 577 C 254.97715 577 250.5 572.52285 250.5 567 L 250.5 392 C 250.5 386.47715 254.97715 382 260.5 382 Z" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="4"/>
+      </g>
+      <g id="Graphic_17">
+        <path d="M 957.5 382 L 998 382 C 1003.5228 382 1008 386.47715 1008 392 L 1008 567 C 1008 572.52285 1003.5228 577 998 577 L 957.5 577 C 951.9772 577 947.5 572.52285 947.5 567 L 947.5 392 C 947.5 386.47715 951.9772 382 957.5 382 Z" fill="#ab7942"/>
+        <path d="M 957.5 382 L 998 382 C 1003.5228 382 1008 386.47715 1008 392 L 1008 567 C 1008 572.52285 1003.5228 577 998 577 L 957.5 577 C 951.9772 577 947.5 572.52285 947.5 567 L 947.5 392 C 947.5 386.47715 951.9772 382 957.5 382 Z" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="4"/>
+      </g>
+      <g id="Graphic_18">
+        <path d="M 678.5 382 L 719 382 C 724.52285 382 729 386.47715 729 392 L 729 567 C 729 572.52285 724.52285 577 719 577 L 678.5 577 C 672.97715 577 668.5 572.52285 668.5 567 L 668.5 392 C 668.5 386.47715 672.97715 382 678.5 382 Z" fill="#ab7942"/>
+        <path d="M 678.5 382 L 719 382 C 724.52285 382 729 386.47715 729 392 L 729 567 C 729 572.52285 724.52285 577 719 577 L 678.5 577 C 672.97715 577 668.5 572.52285 668.5 567 L 668.5 392 C 668.5 386.47715 672.97715 382 678.5 382 Z" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="4"/>
+      </g>
+      <g id="Graphic_19">
+        <circle cx="1525" cy="479.5" r="75.0001198426422" fill="#ff9300"/>
+        <circle cx="1525" cy="479.5" r="75.0001198426422" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/>
+      </g>
+      <g id="Line_25">
+        <line x1="313" y1="479.5" x2="647.6" y2="479.5" marker-end="url(#FilledArrow_Marker)" stroke="#ff2600" stroke-linecap="round" stroke-linejoin="round" stroke-width="4"/>
+      </g>
+      <g id="Line_26">
+        <line x1="1010" y1="479.5" x2="1431.1" y2="479.5" marker-end="url(#FilledArrow_Marker_2)" stroke="#00fdff" stroke-linecap="round" stroke-linejoin="round" stroke-width="4"/>
+      </g>
+      <g id="Line_27">
+        <line x1="729" y1="480.2539" x2="926.6001" y2="479.655" marker-end="url(#FilledArrow_Marker_3)" stroke="#00fa00" stroke-linecap="round" stroke-linejoin="round" stroke-width="4"/>
+      </g>
+      <g id="Graphic_28">
+        <text transform="translate(325.5 199)" fill="#ff2600">
+          <tspan font-family="Helvetica Neue" font-size="32" font-weight="400" fill="#ff2600" x="0" y="30">Subnet: 10.0.30.0/24</tspan>
+        </text>
+      </g>
+      <g id="Graphic_29">
+        <text transform="translate(964.344 173)" fill="#00fdff">
+          <tspan font-family="Helvetica Neue" font-size="32" font-weight="400" fill="#00fdff" x="8526513e-19" y="30">Subnet: 2600:1f14:135:cc00::/64,</tspan>
+          <tspan font-family="Helvetica Neue" font-size="32" font-weight="400" fill="#00fdff" x="148.816" y="67.896">10.0.20.0/24</tspan>
+        </text>
+      </g>
+      <g id="Graphic_30">
+        <text transform="translate(255.5 333.5)" fill="black">
+          <tspan font-family="Helvetica Neue" font-size="20" font-weight="400" fill="black" x="8668621e-19" y="19">NIC: 10.0.30.5</tspan>
+        </text>
+      </g>
+      <g id="Graphic_31">
+        <text transform="translate(979 322.44)" fill="black">
+          <tspan font-family="Helvetica Neue" font-size="20" font-weight="400" fill="black" x="0" y="19">NIC: </tspan>
+          <tspan font-family="Helvetica Neue" font-size="20" font-weight="400" fill="black" y="19">2600:1f14:135:cc00::5.128,</tspan>
+          <tspan font-family="Helvetica Neue" font-size="20" font-weight="400" fill="black" x="103.01" y="42.56">10.0.20.4</tspan>
+        </text>
+      </g>
+      <g id="Graphic_32">
+        <text transform="translate(595.42 338.5)" fill="black">
+          <tspan font-family="Helvetica Neue" font-size="20" font-weight="400" fill="black" x="8668621e-19" y="19">NIC: 10.0.30.</tspan>
+          <tspan font-family="Helvetica Neue" font-size="20" font-weight="400" fill="black" y="19">4</tspan>
+        </text>
+      </g>
+      <g id="Graphic_33">
+        <text transform="translate(1548.724 565.94)" fill="black">
+          <tspan font-family="Helvetica Neue" font-size="40" font-weight="400" fill="black" x="0" y="38">IGW</tspan>
+        </text>
+      </g>
+      <g id="Graphic_34">
+        <text transform="translate(595.675 -.6119995)" fill="black">
+          <tspan font-family="Helvetica Neue" font-size="50" font-weight="400" fill="black" x="73896445e-20" y="48">VPP scenario in AWS</tspan>
+        </text>
+      </g>
+    </g>
+  </g>
+</svg>
diff --git a/docs/about.rst b/docs/about.rst
index b6a5918f18c..012f651e96a 100644
--- a/docs/about.rst
+++ b/docs/about.rst
@@ -4,6 +4,6 @@
 About
 =====
 
-**VPP Version:** 19.04-rc0~276-g3bce8eb
+**VPP Version:** 19.04-rc0~295-ga28d6fb
 
-**Built on:** Tue Feb 26 14:00:03 GMT 2019
+**Built on:** Thu Apr 25 16:22:14 GMT 2019
diff --git a/docs/usecases/ConnectingVPC.rst b/docs/usecases/ConnectingVPC.rst
new file mode 100644
index 00000000000..8ecb790def0
--- /dev/null
+++ b/docs/usecases/ConnectingVPC.rst
@@ -0,0 +1,109 @@
+.. _ConnectingVPC:
+
+.. toctree::
+
+Interconnecting VPCs with Segment Routing & Performance Evaluation
+____________________________________________________________________
+
+Before reading this part, you should have a minimum understading of AWS, especially on `VPC concepts <https://docs.aws.amazon.com/vpc/latest/userguide/what-is-amazon-vpc.html>`_.
+
+
+
+.. figure:: /_images/Connecting_VPC.svg
+
+Figure 1:  Simplified view of our final configuration.
+
+
+In this section we will set VPP as Gateway of our VPC and, thanks to its support to Segment Routing per IPV6, we will interconnect several VPCs together. Figure 1 shows what will be our final configuration. We are interested in interconnecting several VPCs together since we could perform Service Chaining inside AWS.
+
+Now we focus on the basic elements you should deploy inside the VPC in order to make  this configuration works. Here you can find some scripts `to automate the deployment of these resources <https://github.com/francescospinelli94/Automating-Deployment-VPP>`_.
+In our VPC we will have two instances: one, in which we will install VPP and the other one which will be our Client/Server machine. We suggest you to create 3 subnets inside your VPC: one associated with IPv4 addresses, for reaching your VMs through SSH. The second one, also with IPV4 addresses, that allows connectivity between the Client/Server machine and the VPP machine. Finally you need a third one, with both IPv4 and IPv6 address, to connect VPP with the Amazon IGW and we will use IPv6 addresses to implement Segment Routing. Moreover you have to attach to the Client/Server machine one additional NIC, while instead to the VPP machine you have to attach 2 different NIC. One will be used inside the IPv6 subnet while the other one will allow communications with the other VM. you can find an example in Figure 2
+
+
+.. figure:: /_images/vpc_scheme.svg
+
+Figure 2: Example of the resourses present inside our VPC
+
+
+Notice that the following example works with two VPCs, where in each of them there are a VM with VPP and a VM. Hence,  you will have to execute the same commands also in the other VPC to make the connection between the two VPC possibile.
+
+
+Now, create a new VM instance (you can use same setting as before (Ubuntu Server 16.04 and m5 type)) and attach a NIC. Remember that the two Client/Server machine's NICs should stay in two different IPv4 Subnet. Afterwards, on the VM's terminal execute these commands:
+
+.. code-block:: console
+
+ $ sudo /sbin/ip -4 addr add 10.1.2.113/24 dev ens6
+ $ sudo ifconfig ens6 up
+ $ sudo /sbin/ip -4 route add 10.2.0.0/16 via 10.1.4.117
+
+Basically you are setting up the interface which you will use to reach VPP and telling that all the traffic belonging to the subnet 10.2.0.0/16, which in our case is the one of the other VPC, should go through VPP's interface. Remember also to do the same thing in the route table menu of the Amazon Console Management.
+
+Now go to the terminal of VPP, enter in the VPP CLI and type these commands to  set up the two virtual interfaces. To see how to bind the NICs to VPP, see here (Link AWS in VPP).
+
+.. code-block:: console
+
+ vpp# set int state VirtualFunctionEthernet0/6/0 up
+ vpp# set int state VirtualFunctionEthernet0/7/0 up
+
+Here instead you are assigning the IP addresses to the network interfaces.
+
+.. code-block:: console
+
+ vpp# set int ip address VirtualFunctionEthernet0/6/0 10.1.4.117/24
+ vpp# set int ip address VirtualFunctionEthernet0/7/0 2600:1f14:e0e:7f00:f672:1039:4e41:e68/64
+
+Afterwards, you should use the Segment Routing's functionalities. Note that for the localsid address we are using a different IPv6 address (you can generate another one through the Amazon console)
+
+
+.. code-block:: console
+
+ vpp# set sr encaps source addr 2600:1f14:e0e:7f00:f672:1039:4e41:e68
+ vpp# sr localsid address 2600:1f14:e0e:7f00:8da1:c8fa:5301:1d1f behavior end.dx4     	VirtualFunctionEthernet0/6/0 10.1.4.117
+ vpp# sr policy add bsid c:1::999:1  next 2600:1f14:135:cc00:43c1:e860:7ce9:e94a encap
+ vpp# sr steer l3 10.2.5.0/24 via  bsid c:1::999:1
+
+Finally, you are setting the ip6 discovery, telling which is the next hop (the IGW). Notice that the MAC address is the MAC address of the IGW.
+
+.. code-block:: console
+
+
+ vpp# set ip6 neighbor VirtualFunctionEthernet0/7/0 fe80::84f:3fff:fe2a:aaf0 0a:4f:3f:2a:aa:f0
+ vpp# ip route add ::/0 via fe80::84f:3fff:fe2a:aaf0 VirtualFunctionEthernet0/7/0
+
+
+Now go in the other VM instance in the other VPC, which could be located in another Amazon Region, and do the same commands. First in the VM:
+
+.. code-block:: console
+
+ vpp# sudo /sbin/ip -4 addr add 10.2.5.190/24 dev ens6
+ vpp# sudo ifconfig ens6 up
+ vpp# sudo /sbin/ip -4 route add 10.2.0.0/16 via 10.2.5.21
+
+Then, in VPP:
+
+.. code-block:: console
+
+ vpp# set int state VirtualFunctionEthernet0/6/0 up
+ vpp# set int state VirtualFunctionEthernet0/7/0 up
+ vpp# set int ip address VirtualFunctionEthernet0/6/0 10.2.5.21/24
+ vpp# set int ip address VirtualFunctionEthernet0/7/0 2600:1f14:135:cc00:13b9:ff74:348d:7642/64
+ vpp# set sr encaps source addr 2600:1f14:135:cc00:13b9:ff74:348d:7642
+ vpp# sr policy add bsid c:3::999:1  next 2600:1f14:e0e:7f00:8da1:c8fa:5301:1d1f encap
+ vpp# sr steer l3 10.1.4.0/24 via bsid c:3::999:1
+ vpp# set ip6 neighbor VirtualFunctionEthernet0/7/0 fe80::86a:b7ff:fe5d:73c0 0a:4c:fd:b8:c1:3e
+ vpp# ip route add ::/0 via fe80::86a:b7ff:fe5d:73c0 VirtualFunctionEthernet0/7/0
+
+Now if you try ping your Server machine from your Client Machine you should be able to reach it.
+
+If you are interested in Performance evaluation inside this scenario, we will present a poster at INFOCOM'19, in which will be present our performance evaluation of Segment routing inside AWS:
+
+*Francesco  Spinelli,  Luigi  Iannone,  and  Jerome  Tollet. “Chaining  your  Virtual  Private  Clouds  with  Segment Routing”. In:2019 IEEE INFOCOM Poster (INFOCOM2019 Poster). Paris, France, Apr. 2019*
+
+
+**Troubleshooting**
+
+* Remember to disable source/dest check on the VPP and VMs Network Card interfaces. You can do it through the Amazon Console.
+
+* The commands work with VPP version 18.07. If you're using a different version, probably the syntax of some VPP commands will be slightly different.
+
+* Be careful: if you stop your VM with VPP you will need to attach again the two NICs to VPP.
diff --git a/docs/usecases/automatingthedeployment.rst b/docs/usecases/automatingthedeployment.rst
new file mode 100644
index 00000000000..6772b18e4e5
--- /dev/null
+++ b/docs/usecases/automatingthedeployment.rst
@@ -0,0 +1,12 @@
+.. _automatingthedeployment:
+
+.. toctree::
+
+Automating VPP deployment
+__________________________
+
+
+
+In order to make the VPP deployment easier inside AWS and Azure, we have created two different Terraform scripts, compatibles with both Public Cloud Provider. These scripts allow to automate the deployment of the resources. `Here you can find the scripts anf further informations <https://github.com/francescospinelli94/Automating-Deployment-VPP>`_.
+
+
diff --git a/docs/usecases/index.rst b/docs/usecases/index.rst
index 614f0026094..94135ea472f 100644
--- a/docs/usecases/index.rst
+++ b/docs/usecases/index.rst
@@ -1,18 +1,19 @@
 .. _usecases:
 
 
-Use Cases 
+Use Cases
 ==========
 
 This chapter contains a sample of the many ways FD.io VPP can be used. It is by no means an
 extensive list, but should give a sampling of the many features contained in FD.io VPP.
 
 .. toctree::
-  
+
    containers
    simpleperf/index.rst
    vhost/index.rst
    vmxnet3
+   vppcloud
    homegateway
    contiv/index.rst
    networksim
diff --git a/docs/usecases/vppcloud.rst b/docs/usecases/vppcloud.rst
new file mode 100644
index 00000000000..22bb984e1e0
--- /dev/null
+++ b/docs/usecases/vppcloud.rst
@@ -0,0 +1,14 @@
+.. _vppcloud:
+
+VPP inside the Cloud
+====================
+
+This section will cover the VPP deployment inside two different Public Cloud Provider: Amazon AWS and Microsoft Azure. Furthermore, we describe how to interconnect several  Public Cloud Regions together with Segment Routing per IPv6 and we show some Performance Evaluation. Finally, we make our Terraform scripts available to the community, which could help in automating the VPP deployment inside the Cloud.
+
+
+.. toctree::
+
+   vppinaws
+   ConnectingVPC
+   vppinazure
+   automatingthedeployment
diff --git a/docs/usecases/vppinaws.rst b/docs/usecases/vppinaws.rst
new file mode 100644
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+.. _vppinaws:
+
+.. toctree::
+
+VPP in AWS
+___________________
+
+Warning: before starting this guide you should have a minimum knowledge on how `AWS works <https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/concepts.html>`_!
+
+First of all, you should log into your Virtual Machine inside AWS (we suggest to create an instance with Ubuntu 16.04 on a m5 type) and download some useful packages to make VPP installation as smooth as possible: 
+
+.. code-block:: console
+
+ $ sudo apt-get update
+ $ sudo apt-get upgrade
+ $ sudo apt-get install build-essential
+ $ sudo apt-get install python-pip
+ $ sudo apt-get install libnuma-dev
+ $ sudo apt-get install make
+ $ sudo apt install libelf-dev
+
+
+
+Afterwards, types the following commands to install VPP:
+
+.. code-block:: console
+
+ $ curl -s https://packagecloud.io/install/repositories/fdio/1807/script.deb.sh | sudo bash
+
+
+
+
+In this case we downloaded VPP version 18.07 but actually you can use any VPP version available. Then, you can install VPP with all of its plugins: 
+
+
+.. code-block:: console
+
+ $ sudo apt-get update
+ $ sudo apt-get install vpp
+ $ sudo apt-get install vpp-plugins vpp-dbg vpp-dev vpp-api-java vpp-api-python vpp-api-lua
+
+
+
+Now, you need to bind the NICs (Network Card Interface) to VPP. Firstly you have the retrieve the PCI addresses of the NICs you want to bind:
+
+.. code-block:: console
+
+ $ sudo lshw -class network -businfo
+
+
+
+
+The PCI addresses have a format similar to this: 0000:00:0X.0. Once you retrieve them, you should copy them inside the startup file of VPP:
+
+.. code-block:: console
+
+ $ sudo nano /etc/vpp/startup.conf
+
+
+
+Here, inside the dpdk block, copy the PCI addresses of the NIC you want to bind to VPP.
+
+
+.. code-block:: console
+
+  dev 0000:00:0X.0
+
+
+
+
+Now you should install DPDK package. This will allow to bind the NICs to VPP through a script available inside the DPDK package:
+
+.. code-block:: console
+
+ $  wget https://fast.dpdk.org/rel/dpdk-18.08.tar.xz
+ $  tar -xvf dpdk-18.08.tar.xz
+ $  cd ~/dpdk-18.08/usertools/
+
+
+
+and open the script:
+
+.. code-block:: console
+
+ $ ./dpdk-setup.sh
+
+
+
+When the script is running, you should be able to execute several options. For the moment, just  install  T=x86_64-native-linuxapp-gcc and then close the script. Now go inside:
+
+.. code-block:: console
+
+ $ cd ~/dpdk-18.08/x86_64-native-linuxapp-gcc/
+
+
+
+and type:
+
+.. code-block:: console
+
+ $ sudo modprobe uio
+ $ sudo insmod kmod/igb_uio.ko
+
+
+In this way, the PCIs  addresses should appear inside the setup file of DPDK and therefore you  can bind them:
+
+.. code-block:: console
+
+ $ ./dpdk-setup.sh
+
+
+
+Inside the script, bind the NICs using the option 24.
+
+Finally restart VPP and the NICs should appear inside VPP CLI:
+
+.. code-block:: console
+
+ $ sudo service vpp stop
+ $ sudo service vpp start
+ $ sudo vppctl show int
+
+
+
+
+Notice that if you stop the VM, you need to bind again the NICs.
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/docs/usecases/vppinazure.rst b/docs/usecases/vppinazure.rst
new file mode 100644
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+++ b/docs/usecases/vppinazure.rst
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+.. _vppinazure:
+
+.. toctree::
+
+VPP in Azure
+___________________
+
+
+
+
+Before starting, a few notes:
+
+* in our configuration we use only DPDK 18.02, since with the newer versions, such as DPDK 18.05, we obtained several problems during VPP installation (mostly related with MLX4 PMD Drivers). 
+
+* Some of the commands are taken from `Azure’s DPDK page <https://docs.microsoft.com/en-us/azure/virtual-network/setup-dpdk>`_.
+
+To bring DPDK inside Azure, we perform the following procedure:
+
+Firstly, we install the DPDK dependencies:
+
+.. code-block:: console
+
+ $ sudo add-apt-repository ppa:canonical-server/dpdk-azure –y
+ $ sudo apt-get update
+ $ sudo apt-get install -y librdmacm-dev librdmacm1 build-essential libnuma-dev libmnl-dev
+
+Then, we download DPDK 18.02:
+
+.. code-block:: console
+
+ $ sudo wget https://fast.dpdk.org/rel/dpdk-18.02.2.tar.xz
+ $ tar -xvf dpdk-18.02.2.tar.xz
+
+Finally, we build DPDK, modifying first its configuration files in order to make VPP compatible with MLX4 drivers:
+
+Inside config/common_base, modify:
+
+.. code-block:: console
+
+  CONFIG_RTE_BUILD_SHARED_LIB=n
+  CONFIG_RTE_LIBRTE_MLX4_PMD=y
+  CONFIG_RTE_LIBRTE_MLX4_DLOPEN_DEPS=y
+  CONFIG_RTE_LIBRTE_TAP_PMD=y
+  CONFIG_RTE_LIBRTE_FAILSAFE_PMD=y
+
+and then:
+
+.. code-block:: console
+
+ $ make config T=x86_64-native-linuxapp-gcc
+ $ sed -ri 's,(MLX._PMD=)n,\1y,' build/.config
+ $ make
+
+Finally we build DPDK:
+
+.. code-block:: console
+
+ $ make install T=x86_64-native-linuxapp-gcc DESTDIR=/home/ciscotest/test EXTRA_CFLAGS='-fPIC -pie'
+
+And we reboot the instance:
+
+.. code-block:: console
+
+ $ reboot istance
+
+After the reboot, we type these commands:
+
+.. code-block:: console
+
+ $ echo 1024 | sudo tee /sys/devices/system/node/node*/hugepages/hugepages-2048kB/nr_hugepages
+ $ mkdir /mnt/huge
+ $ sudo mount -t hugetlbfs nodev /mnt/huge
+ $ grep Huge /proc/meminfo
+ $ modprobe -a ib_uverbs
+ $ cd x86_64-native-linuxapp-gcc/
+ $ ls
+ $ cd lib/
+ $ ls
+ $ sudo cp librte_pmd_mlx4_glue.so.18.02.0 /usr/lib
+
+**Now we focus on VPP installation:**
+
+In our configuration we use VPP 18.07.
+
+We perform this procedure in order to install VPP 18.07 with an external DPDK configuration inside Azure.
+
+Firstly, we download VPP
+
+.. code-block:: console
+
+ $ git clone https://gerrit.fd.io/r/vpp
+ $ git checkout v18.07
+
+Then, we build VPP, using the external DPDK configuration we previously made:
+
+We modify the path inside the vpp.mk file:
+
+.. code-block:: console
+
+ $ build-data/platforms/vpp.mk
+ $ vpp_uses_external_dpdk = yes
+ $ vpp_dpdk_inc_dir = <PATH_TO_DESTDIR_NAME_FROM_ABOVE>/include/dpdk/
+ $ vpp_dpdk_lib_dir =<PATH_TO_DESTDIR_NAME_FROM_ABOVE>/lib
+
+<PATH_TO_DESTDIR_NAME_FROM_ABOVE> is whatever the path used when compiling DPDK above. These paths have to be absolute path in order for it to work.
+
+we modify build-data/platforms/vpp.mk to use
+
+.. code-block:: console
+
+ vpp_uses_dpdk_mlx4_pmd = yes
+
+.. code-block:: console
+
+ $ make build
+ $ cd build-root/
+ $ make V=0 PLATFORM=vpp TAG=vpp install-deb
+ $ sudo dpkg -i *.deb
+
+Finally, we modify the startup.conf file:
+
+.. code-block:: console
+
+ $ cd /etc/vpp
+ $ sudo nano startup.conf
+
+Inside the DPDK block, the following commands:
+
+.. code-block:: console
+
+
+ ## Whitelist specific interface by specifying PCI address
+ dev 000X:00:0X.0
+ dev 000X:00:0X.0
+ 
+ # Running failsafe
+ vdev net_vdev_netvsc0,iface=eth1
+ vdev net_vdev_netvsc1,iface=eth2
+
+*Please refer to Azure DPDK document to pick the right iface to use for failsafe vdev.*
+
+
+and finally:
+
+.. code-block:: console
+
+ $ sudo service vpp stop
+ $ sudo service vpp start
+ $ sudo service vpp status
+ $ sudo vppctl
+
+Now VPP will work inside Azure!
+
+
+
+
+
+
+
+