Getting started with the configuration

After a successful installation, VPP installs a startup config file named startup.conf in the /etc/vpp/ directory. This file can be tailored to make VPP run as desired, but contains default values for typical installations.

Below are more details about this file and some of the the parameters and values it contains.

Command-line Arguments

Before we describe details of the startup configuration file (startup.conf) it should be mentioned that VPP can be started without a startup configuration file.

Parameters are grouped by a section name. When providing more than one parameter to a section, all parameters for that section must be wrapped in curly braces. For example, to start VPP with configuration data via the command line with the section name 'unix':

$ sudo /usr/bin/vpp unix { interactive cli-listen }

The command line can be presented as a single string or as several; anything given on the command line is concatenated with spaces into a single string before parsing. VPP applications must be able to locate their own executable images. The simplest way to ensure this will work is to invoke a VPP application by giving its absolute path. For example: '/usr/bin/vpp <options>' At startup, VPP applications parse through their own ELF-sections [primarily] to make lists of init, configuration, and exit handlers.

When developing with VPP, in gdb it's often sufficient to start an application like this:

(gdb) run unix interactive

Configuration File (startup.conf)

The more typical way to specify the startup configuration to VPP is with the startup configuration file (startup.conf).

The path of the file is provided to the VPP application on the command line. This is typically at /etc/vpp/startup.conf. If VPP is installed as a package a default startup.conf file is provided at this location.

The format of the configuration file is a simple text file with the same content as the command line.

A very simple startup.conf file:

$ cat /etc/vpp/startup.conf
unix {
  log /var/log/vpp/vpp.log
  cli-listen localhost:5002

api-trace {

dpdk {
  dev 0000:03:00.0

VPP is instructed to load this file with the -c option. For example:

$ sudo /usr/bin/vpp -c /etc/vpp/startup.conf