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.. _running:
Running VPP
===========
.. toctree::
'vpp' Usergroup
---------------
When VPP is installed, a new usergroup *'vpp'* is created. To avoid running the
VPP CLI (vppctl) as root, add any existing users to the new group that need to
interact with VPP:
.. code-block:: console
$ sudo usermod -a -G vpp user1
Update your current session for the group change to take effect:
.. code-block:: console
$ newgrp vpp
VPP Systemd File - 'vpp.service'
--------------------------------
When the VPP is installed, a systemd service files is also installed. This
file, vpp.service (Ubuntu: /lib/systemd/system/vpp.service and CentOS:
/usr/lib/systemd/system/vpp.service), controls how VPP is run as a service. For
example, whether or not to restart on failure and if so, with how much delay.
Also, which UIO driver should be loaded and location of the *'startup.conf'*
file.
.. code-block:: console
$ cat /usr/lib/systemd/system/vpp.service
[Unit]
Description=Vector Packet Processing Process
After=syslog.target network.target auditd.service
[Service]
ExecStartPre=-/bin/rm -f /dev/shm/db /dev/shm/global_vm /dev/shm/vpe-api
ExecStartPre=-/sbin/modprobe uio_pci_generic
ExecStart=/usr/bin/vpp -c /etc/vpp/startup.conf
Type=simple
Restart=on-failure
RestartSec=5s
[Install]
WantedBy=multi-user.target
.. note::
Some older versions of the *'uio_pci_generic'* driver don't bind all
the supported NICs properly, so the *'igb_uio'* driver built from DPDK
needs to be installed. This file controls which driver is loaded at boot.
*'startup.conf'* file controls which driver is used.
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