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+.. This work is licensed under a Creative Commons Attribution 4.0 International
+.. License.
+.. http://creativecommons.org/licenses/by/4.0
+.. (c) OPNFV, National Center of Scientific Research "Demokritos" and others.
+
+============================
+CGNAPT - Installation Guide
+============================
+
+
+vCGNAPT Compilation
+===================
+
+After downloading (or doing a git clone) in a directory (samplevnf)
+
+###### Dependencies
+* DPDK 16.04: Downloaded and installed via vnf_build.sh or manually from [here](http://fast.dpdk.org/rel/dpdk-16.04.tar.xz)
+Both the options are available as part of vnf_build.sh below.
+* libpcap-dev
+* libzmq
+* libcurl
+
+###### Environment variables
+
+Apply all the additional patches in 'patches/dpdk_custom_patch/' and build dpdk
+
+::
+ export RTE_SDK=<dpdk 16.04 directory>
+ export RTE_TARGET=x86_64-native-linuxapp-gcc
+
+This is done by vnf_build.sh script.
+
+Auto Build:
+==========
+$ ./tools/vnf_build.sh in samplevnf root folder
+
+Follow the steps in the screen from option [1] --> [8] and select option [7]
+to build the vnfs.
+It will automatically download DPDK 16.04 and any required patches and will setup
+everything and build vCGNAPT VNFs.
+
+Following are the options for setup:
+
+::
+
+ ----------------------------------------------------------
+ Step 1: Environment setup.
+ ----------------------------------------------------------
+ [1] Check OS and network connection
+
+ ----------------------------------------------------------
+ Step 2: Download and Install
+ ----------------------------------------------------------
+ [2] Agree to download
+ [3] Download packages
+ [4] Download DPDK zip (optional, use it when option 4 fails)
+ [5] Install DPDK
+ [6] Setup hugepages
+
+ ----------------------------------------------------------
+ Step 3: Build VNF
+ ----------------------------------------------------------
+ [7] Build VNF
+
+ [8] Exit Script
+
+An vCGNAPT executable will be created at the following location
+samplevnf/VNFs/vCGNAPT/build/vCGNAPT
+
+
+Manual Build:
+============
+1. Download DPDK 16.04 from dpdk.org
+ - http://dpdk.org/browse/dpdk/snapshot/dpdk-16.04.zip
+2. unzip dpdk-16.04 and apply dpdk patch
+ - cd dpdk-16.04
+ - patch -p0 < VNF_CORE/patches/dpdk_custom_patch/rte_pipeline.patch
+ - patch -p1 < VNF_CORE/patches/dpdk_custom_patch/i40e-fix-link-management.patch
+ - patch -p1 < VNF_CORE/patches/dpdk_custom_patch/i40e-fix-Rx-hang-when-disable-LLDP.patch
+ - patch -p1 < VNF_CORE/patches/dpdk_custom_patch/i40e-fix-link-status-change-interrupt.patch
+ - patch -p1 < VNF_CORE/patches/dpdk_custom_patch/i40e-fix-VF-bonded-device-link-down.patch
+ - build dpdk
+ - make config T=x86_64-native-linuxapp-gcc O=x86_64-native-linuxapp-gcc
+ - cd x86_64-native-linuxapp-gcc
+ - make
+ - Setup huge pages
+ - For 1G/2M hugepage sizes, for example 1G pages, the size must be specified
+ explicitly and can also be optionally set as the default hugepage size for
+ the system. For example, to reserve 8G of hugepage memory in the form of
+ eight 1G pages, the following options should be passed to the kernel:
+ * default_hugepagesz=1G hugepagesz=1G hugepages=8 hugepagesz=2M hugepages=2048
+ - Add this to Go to /etc/default/grub configuration file.
+ - Append "default_hugepagesz=1G hugepagesz=1G hugepages=8 hugepagesz=2M hugepages=2048"
+ to the GRUB_CMDLINE_LINUX entry.
+3. Setup Environment Variable
+ - export RTE_SDK=<samplevnf>/dpdk-16.04
+ - export RTE_TARGET=x86_64-native-linuxapp-gcc
+ - export VNF_CORE=<samplevnf>
+ or using ./toot/setenv.sh
+4. Build vCGNAPT VNFs
+ - cd <samplevnf>/VNFs/vCGNAPT
+ - make clean
+ - make
+5. An vCGNAPT executable will be created at the following location
+ - <samplevnf>/VNFs/vCGNAPT/build/vCGNAPT
+
+Run
+====
+
+Setup Port to run VNF:
+----------------------
+::
+ 1. cd <samplevnf>/dpdk-16.04
+ 3. ./tool/dpdk_nic_bind.py --status <--- List the network device
+ 2. ./tool/dpdk_nic_bind.py -b igb_uio <PCI Port 0> <PCI Port 1>
+ .. _More details: http://dpdk.org/doc/guides-16.04/linux_gsg/build_dpdk.html#binding-and-unbinding-network-ports-to-from-the-kernel-modules
+
+ Make the necessary changes to the config files to run the vCGNAPT VNF
+ eg: ports_mac_list = 00:00:00:30:21:F0 00:00:00:30:21:F1
+
+Dynamic CGNAPT
+--------------
+Update the configuration according to system configuration.
+
+::
+ ./vCGNAPT -p <port mask> -f <config> -s <script> - SW_LoadB
+ ./vCGNAPT -p <port mask> -f <config> -s <script> -hwlb <num_WT> - HW_LoadB
+
+Static CGNAPT
+-------------
+Update the script file and add Static NAT Entry
+
+::
+ e.g,
+ ;p <pipeline id> entry addm <prv_ipv4/6> prvport> <pub_ip> <pub_port> <phy_port> <ttl> <no_of_entries> <end_prv_port> <end_pub_port>
+ ;p 3 entry addm 152.16.100.20 1234 152.16.40.10 1 0 500 65535 1234 65535
+
+Run IPv4
+----------
+::
+ Software LoadB
+ --------------
+ cd <samplevnf>/VNFs/vCGNAPT/build
+ ./vCGNAPT -p 0x3 -f ./config/arp_txrx-2P-1T.cfg -s ./config/arp_txrx_ScriptFile_2P.cfg
+
+
+ Hardware LoadB
+ --------------
+ cd <samplevnf>/VNFs/vCGNAPT/build
+ ./vCGNAPT -p 0x3 -f ./config/arp_hwlb-2P-1T.cfg -s ./config/arp_hwlb_scriptfile_2P.cfg --hwlb 1
+
+Run IPv6
+---------
+::
+ Software LoadB
+ --------------
+ cd <samplevnf>/VNFs/vCGNAPT/build
+ ./vCGNAPT -p 0x3 -f ./config/arp_txrx-2P-1T-ipv6.cfg -s ./config/arp_txrx_ScriptFile_2P.cfg
+
+
+ Hardware LoadB
+ --------------
+ cd <samplevnf>/VNFs/vCGNAPT/build
+ ./vCGNAPT -p 0x3 -f ./config/arp_hwlb-2P-1T-ipv6.cfg -s ./config/arp_hwlb_scriptfile_2P.cfg --hwlb 1
+
+vCGNAPT execution on BM & SRIOV:
+--------------------------------
+::
+ To run the VNF, execute the following:
+ samplevnf/VNFs/vCGNAPT# ./build/vCGNAPT -p 0x3 -f ./config/arp_txrx-2P-1T.cfg -s ./config/arp_txrx_ScriptFile_2P.cfg
+ Command Line Params:
+ -p PORTMASK: Hexadecimal bitmask of ports to configure
+ -f CONFIG FILE: vCGNAPT configuration file
+ -s SCRIPT FILE: vCGNAPT script file
+
+vCGNAPT execution on OVS:
+-------------------------
+::
+ To run the VNF, execute the following:
+ samplevnf/VNFs/vCGNAPT# ./build/vCGNAPT -p 0x3 ./config/arp_txrx-2P-1T.cfg -s ./config/arp_txrx_ScriptFile_2P.cfg --disable-hw-csum
+ Command Line Params:
+ -p PORTMASK: Hexadecimal bitmask of ports to configure
+ -f CONFIG FILE: vCGNAPT configuration file
+ -s SCRIPT FILE: vCGNAPT script file
+ --disable-hw-csum :Disable TCP/UDP hw checksum