Connecting Two FD.io VPP Instances¶

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¶

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¶

Connect two FD.io VPP topology¶

Initial state¶

The initial state here is presumed to be the final state from the exercise Create an Interface

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.

$ 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

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

$ 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

Create memif interface on vpp2¶

We want vpp2 to pick up the ‘slave’ role using the same run/vpp/memif-vpp1vpp2 socket file

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 vpp1 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

Ping from vpp1 to vpp2¶

Ping 10.10.2.2 from vpp1

$ ping 10.10.2.2

Ping 10.10.2.1 from vpp2

$ ping 10.10.2.1