| 1 | ifup(8) ifup(8)
|
|---|
| 2 |
|
|---|
| 3 | NAME
|
|---|
| 4 | ifup - bring a network interface up
|
|---|
| 5 | ifdown - take a network interface down
|
|---|
| 6 |
|
|---|
| 7 | SYNOPSIS
|
|---|
| 8 | ifup IFACE
|
|---|
| 9 | ifup -h|--help
|
|---|
| 10 | ifup -V|--version
|
|---|
| 11 |
|
|---|
| 12 | ifdown IFACE
|
|---|
| 13 | ifdown -h|--help
|
|---|
| 14 | ifdown -V|--version
|
|---|
| 15 |
|
|---|
| 16 | DESCRIPTION
|
|---|
| 17 | The ifup and ifdown commands may be used to configure
|
|---|
| 18 | (or, respectively, deconfigure) a network interface based
|
|---|
| 19 | on interface definitions in the file
|
|---|
| 20 | /etc/sysconfig/ifconfig.IFACE.
|
|---|
| 21 |
|
|---|
| 22 | OPTIONS
|
|---|
| 23 | A summary of options is included below.
|
|---|
| 24 |
|
|---|
| 25 | -h, --help
|
|---|
| 26 | Show summary of options.
|
|---|
| 27 |
|
|---|
| 28 | -V, --version
|
|---|
| 29 | Show version information.
|
|---|
| 30 |
|
|---|
| 31 | EXAMPLE
|
|---|
| 32 | ifup eth0
|
|---|
| 33 | Bring up the interface defined in the file
|
|---|
| 34 | /etc/sysconfig/ifconfig.eth0
|
|---|
| 35 |
|
|---|
| 36 | ifdown eth0:2
|
|---|
| 37 | Bring down the interface defined in the file
|
|---|
| 38 | /etc/sysconfig/ifconfig.eth0:2
|
|---|
| 39 |
|
|---|
| 40 | NOTES
|
|---|
| 41 | The program does not configure network interfaces direct-
|
|---|
| 42 | ly. It runs scripts defined by the SERVICE variable in
|
|---|
| 43 | the network configuration file.
|
|---|
| 44 |
|
|---|
| 45 | The configuration files must have the following environ-
|
|---|
| 46 | ment variables set:
|
|---|
| 47 |
|
|---|
| 48 | IFACE - The interface to configure, e.g. eth0. It must
|
|---|
| 49 | be available in /sys/class/net.
|
|---|
| 50 |
|
|---|
| 51 | SERVICE - The service script to run to bring up the inter-
|
|---|
| 52 | face. Standard services are ipv4-static and
|
|---|
| 53 | ipv4-static-route. Other services such as dhcp
|
|---|
| 54 | may be installed.
|
|---|
| 55 |
|
|---|
| 56 | ONBOOT - If set to 'yes', the specified interface is
|
|---|
| 57 | configured by the netowrk boot script.
|
|---|
| 58 |
|
|---|
| 59 | Other paramters that are service specific include:
|
|---|
| 60 |
|
|---|
| 61 | ipv4-static
|
|---|
| 62 |
|
|---|
| 63 | IP - The IP address of the interface,
|
|---|
| 64 | e.g. 192.168.1.2.
|
|---|
| 65 |
|
|---|
| 66 | PREFIX - The number of bits that specify the network
|
|---|
| 67 | number of the interface, e.g., 24.
|
|---|
| 68 |
|
|---|
| 69 | GATEWAY - The default IP address to use for routing
|
|---|
| 70 | if the destination IP address is not in a
|
|---|
| 71 | static route or on a local network, e.g.,
|
|---|
| 72 | 192.168.1.1. For secondary IP addresses on
|
|---|
| 73 | an interface, this parameter should not be
|
|---|
| 74 | specified.
|
|---|
| 75 |
|
|---|
| 76 | BROADCAST - The brodcast address for this interface,
|
|---|
| 77 | e.g 192.168.1.255.
|
|---|
| 78 |
|
|---|
| 79 | ipv4-static-route
|
|---|
| 80 |
|
|---|
| 81 | TYPE - The type of route, typically 'default',
|
|---|
| 82 | 'network', 'or host'.
|
|---|
| 83 |
|
|---|
| 84 | IP - The IP address for a network or host, if thei
|
|---|
| 85 | TYPE is not 'default'.
|
|---|
| 86 |
|
|---|
| 87 | PREFIX - The prefix for the associated IP address.
|
|---|
| 88 |
|
|---|
| 89 | GATEWAY - The IP address for a network route.
|
|---|
| 90 |
|
|---|
| 91 | SOURCE - The source IP address to prefer when sending
|
|---|
| 92 | to the destinations covered by the specified
|
|---|
| 93 | route. (optional)
|
|---|
| 94 |
|
|---|
| 95 | FILES
|
|---|
| 96 | /etc/sysconfig/ifconfig.*
|
|---|
| 97 | definitions of network interfaces
|
|---|
| 98 |
|
|---|
| 99 | AUTHORS
|
|---|
| 100 | The ifup/ifdown suite was written by Nathan Coulson
|
|---|
| 101 | <nathan@linuxfromscratch.org> and Kevin P. Fleming
|
|---|
| 102 | <kpfleming@linuxfromscratch.org>
|
|---|
| 103 | and updated by Bruce Dubbs <bdubbs@linuxfromscratch>.
|
|---|
| 104 |
|
|---|
| 105 | SEE ALSO
|
|---|
| 106 | ip(8).
|
|---|
| 107 |
|
|---|
| 108 | IFUP/IFDOWN 18 Sep 2011 ifup(8)
|
|---|
