.. _twovppinstances: .. toctree:: Connecting Two FD.io VPP Instances ================================== .. _background-1: memif is a very high performance, direct memory interface type which can be used between FD.io VPP instances. It uses a file socket for a control channel to set up shared memory. .. _skills-to-be-learned-1: Skills to be Learned --------------------- You will learn the following new skill in this exercise: #. Create a memif interface between two FD.io VPP instances You should be able to perform this exercise with the following skills learned in previous exercises: #. Run a second FD.io VPP instance #. Add an ip address to a FD.io VPP interface #. Ping from FD.io VPP .. _topology-1: Topology --------- .. figure:: /_images/Connecting_two_vpp_instances_with_memif.png :alt: Connect two FD.io VPP topology Connect two FD.io VPP topology .. _initial-state-1: Initial state -------------- The initial state here is presumed to be the final state from the exercise `Create an Interface `__ .. _action-running-a-second-vpp-instances-1: Running a second FD.io VPP instances ------------------------------------- You should already have a FD.io VPP instance running named: vpp1. Run a second FD.io VPP instance named: vpp2. .. code-block:: console $ sudo /usr/bin/vpp -c startup2.conf .... $ sudo vppctl -s /run/vpp/cli-vpp2.sock _______ _ _ _____ ___ __/ __/ _ \ (_)__ | | / / _ \/ _ \ _/ _// // / / / _ \ | |/ / ___/ ___/ /_/ /____(_)_/\___/ |___/_/ /_/ vpp# show version vpp v18.07-release built by root on c469eba2a593 at Mon Jul 30 23:27:03 UTC 2018 vpp# quit .. _action-create-memif-interface-on-vpp1-1: Create memif interface on vpp1 ------------------------------- Create a memif interface on vpp1. To connect to the instance vpp1 use the socket **/run/vpp/cli-vpp1.sock** .. code-block:: console $ sudo vppctl -s /run/vpp/cli-vpp1.sock vpp# create interface memif id 0 master This will create an interface on vpp1 memif0/0 using /run/vpp/memif as its socket file. The role of vpp1 for this memif interface is 'master'. With what you have learned: #. Set the memif0/0 state to up. #. Assign IP address 10.10.2.1/24 to memif0/0 #. Examine memif0/0 via show commands .. _action-create-memif-interface-on-vpp2-1: Create memif interface on vpp2 -------------------------------- We want vpp2 to pick up the 'slave' role using the same run/vpp/memif-vpp1vpp2 socket file .. code-block:: console vpp# create interface memif id 0 slave This will create an interface on vpp2 memif0/0 using /run/vpp/memif as its socket file. The role of vpp2 for this memif interface is 'slave'. Use your previously used skills to: #. Set the memif0/0 state to up. #. Assign IP address 10.10.2.2/24 to memif0/0 #. Examine memif0/0 via show commands .. _action-ping-from-vpp1-to-vpp2-1: Ping from vpp1 to vpp2 ------------------------ Ping 10.10.2.2 from vpp1 .. code-block:: console $ ping 10.10.2.2 Ping 10.10.2.1 from vpp2 .. code-block:: console $ ping 10.10.2.1