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- ifup(8) ifup(8)
- NAME
- ifup - bring a network interface up
- ifdown - take a network interface down
- SYNOPSIS
- ifup IFACE
- ifup -h|--help
- ifup -V|--version
- ifdown IFACE
- ifdown -h|--help
- ifdown -V|--version
- DESCRIPTION
- The ifup and ifdown commands may be used to configure
- (or, respectively, deconfigure) a network interface based
- on interface definitions in the file
- /etc/sysconfig/ifconfig.IFACE.
- OPTIONS
- A summary of options is included below.
- -h, --help
- Show summary of options.
- -V, --version
- Show version information.
- EXAMPLE
- ifup eth0
- Bring up the interface defined in the file
- /etc/sysconfig/ifconfig.eth0
- ifdown eth0:2
- Bring down the interface defined in the file
- /etc/sysconfig/ifconfig.eth0:2
- NOTES
- The program does not configure network interfaces direct-
- ly. It runs scripts defined by the SERVICE variable in
- the network configuration file.
- The configuration files must have the following environ-
- ment variables set:
- IFACE - The interface to configure, e.g. eth0. It must
- be available in /sys/class/net.
- SERVICE - The service script to run to bring up the inter-
- face. Standard services are ipv4-static and
- ipv4-static-route. Other services such as dhcp
- may be installed.
- ONBOOT - If set to 'yes', the specified interface is
- configured by the netowrk boot script.
- Other paramters that are service specific include:
- ipv4-static
- IP - The IP address of the interface,
- e.g. 192.168.1.2.
- PREFIX - The number of bits that specify the network
- number of the interface, e.g., 24.
-
- GATEWAY - The default IP address to use for routing
- if the destination IP address is not in a
- static route or on a local network, e.g.,
- 192.168.1.1. For secondary IP addresses on
- an interface, this parameter should not be
- specified.
- BROADCAST - The brodcast address for this interface,
- e.g 192.168.1.255.
- ipv4-static-route
- TYPE - The type of route, typically 'default',
- 'network', 'or host'.
- IP - The IP address for a network or host, if thei
- TYPE is not 'default'.
- PREFIX - The prefix for the associated IP address.
- GATEWAY - The IP address for a network route.
- SOURCE - The source IP address to prefer when sending
- to the destinations covered by the specified
- route. (optional)
- FILES
- /etc/sysconfig/ifconfig.*
- definitions of network interfaces
- AUTHORS
- The ifup/ifdown suite was written by Nathan Coulson
- <nathan@linuxfromscratch.org> and Kevin P. Fleming
- <kpfleming@linuxfromscratch.org>
- and updated by Bruce Dubbs <bdubbs@linuxfromscratch>.
- SEE ALSO
- ip(8).
- IFUP/IFDOWN 18 Sep 2011 ifup(8)
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