1.\" $OpenBSD: netstart.8,v 1.24 2020/11/03 06:46:23 jmc Exp $ 2.\" 3.\" Copyright (c) 2002, Miodrag Vallat. 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25.\" 26.\" @(#)rc.8 8.2 (Berkeley) 12/11/93 27.\" 28.Dd $Mdocdate: November 3 2020 $ 29.Dt NETSTART 8 30.Os 31.Sh NAME 32.Nm netstart 33.Nd command script for network startup 34.Sh SYNOPSIS 35.Nm /etc/netstart 36.Op Oo Fl n Oc Ar interface ... 37.Sh DESCRIPTION 38.Nm 39is the command script that is invoked by 40.Xr rc 8 41during an automatic reboot and after single-user mode is exited; 42it performs network initialization. 43.Pp 44The 45.Nm 46script can also be used to start newly created bridges or interfaces, 47or reset existing interfaces to their default state. 48The behaviour of this script is (or can be) controlled to some 49extent by variables defined in 50.Xr rc.conf 8 , 51which specifies which daemons and services are to be run. 52.Pp 53During the system boot, 54.Nm 55is executed. 56.Nm 57performs the following operations, in the sequence given: 58.Pp 59.Bl -bullet -compact -offset indent 60.It 61Set the machine's name. 62.It 63Configure the loopback interface. 64.It 65Configure all physical interfaces. 66.It 67Configure non-physical interfaces that can provide the default gateway, 68such as 69.Xr aggr 4 , 70.Xr trunk 4 , 71.Xr svlan 4 , 72.Xr vlan 4 , 73.Xr carp 4 , 74and 75.Xr pppoe 4 . 76.It 77Initialize the routing table and set up the default routes. 78.It 79Configure tunnel interfaces that require a working network 80to reach the other end of the tunnel, 81such as 82.Xr tun 4 , 83.Xr tap 4 , 84.Xr gif 4 , 85.Xr etherip 4 , 86.Xr gre 4 , 87.Xr egre 4 , 88.Xr pflow 4 , 89and 90.Xr wg 4 . 91.El 92.Pp 93After the system is completely initialized, it is possible to start a 94newly created interface or 95.Xr bridge 4 , 96or reset an existing interface to its default state, by invoking 97the following, where 98.Ar foo0 99is the interface or bridge name: 100.Pp 101.D1 # sh /etc/netstart foo0 102.Pp 103Using the 104.Fl n 105option reports the steps that would be taken, 106without actually configuring the interface. 107.Sh SEE ALSO 108.Xr multicast 4 , 109.Xr defaultdomain 5 , 110.Xr hostname.if 5 , 111.Xr myname 5 , 112.Xr ifconfig 8 , 113.Xr rc 8 , 114.Xr rc.conf 8 115.Sh HISTORY 116The 117.Nm 118command first appeared in 119.Bx 4.0 . 120