1.\" $OpenBSD: netstart.8,v 1.27 2022/07/05 08:14:12 kn 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: July 5 2022 $ 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 interfaces or bridges. 47The behaviour of this script is (or can be) controlled to some 48extent by variables defined in 49.Xr rc.conf 8 , 50which specifies which daemons and services are to be run. 51.Pp 52During the system boot, 53.Nm 54is executed. 55.Nm 56performs the following operations, in the sequence given: 57.Pp 58.Bl -bullet -compact -offset indent 59.It 60Configure the loopback interface. 61.It 62Configure all physical interfaces. 63.It 64Configure non-physical interfaces that can provide the default gateway, 65such as 66.Xr aggr 4 , 67.Xr trunk 4 , 68.Xr svlan 4 , 69.Xr vlan 4 , 70.Xr carp 4 , 71and 72.Xr pppoe 4 . 73.It 74Initialize the routing table and set up the default routes. 75.It 76Configure tunnel interfaces that require a working network 77to reach the other end of the tunnel, 78such as 79.Xr tun 4 , 80.Xr tap 4 , 81.Xr gif 4 , 82.Xr etherip 4 , 83.Xr gre 4 , 84.Xr egre 4 , 85.Xr pflow 4 , 86and 87.Xr wg 4 . 88.El 89.Pp 90After the system is completely initialized, it is possible to start a 91newly created interface or bridges or apply the configuration from a 92.Xr hostname.if 5 93file to an existing interface, by invoking the following, where 94.Ar foo0 95is the interface or bridge name: 96.Pp 97.D1 # sh /etc/netstart foo0 98.Pp 99Using the 100.Fl n 101option reports the steps that would be taken, 102without actually configuring the interface. 103.Sh SEE ALSO 104.Xr multicast 4 , 105.Xr defaultdomain 5 , 106.Xr hostname.if 5 , 107.Xr mygate 5 , 108.Xr ifconfig 8 , 109.Xr rc 8 , 110.Xr rc.conf 8 111.Sh HISTORY 112The 113.Nm 114command first appeared in 115.Bx 4.0 . 116