IFSYSCTL(5)

NAME
ifsysctl[-<interface name>] - per network interface sysctl settings

SYNOPSIS
/etc/sysctl.d/*.conf
/etc/sysctl.conf
/etc/sysconfig/network/ifsysctl
/etc/sysconfig/network/ifsysctl-<interface name>

DESCRIPTION
These files are intended to contain sysctl settings, that should be applied when a network interface is created. This are usually interface specific settings, like:
	net.ipv6.conf.eth0.use_tempaddr = 2
or
	net.ipv4.conf.eth0.rp_filter = 0
Settings from the global configuration files: /etc/sysctl.d/*.conf, /etc/sysctl.conf and /etc/sysconfig/network/ifsysctl are applied for every interface created. Settings from the ifsysctl-interface name file are applied for an interface, when created, which has the corresponding interface name.

SYNTAX
Wicked writes these settings directly to their corresponding /proc/sys locations. It supports two separator characters for sysctl keywords: a "." in default format and a "/" in the alternate format. Therefore, the syntax is basically the same as is found in the /etc/sysctl.conf file. Interface names may contain a ".". In the default sysctl format using a "." as separator, that is any "." in the interface name of the keyword, has to be replaced with a "/". In the alternate sysctl format with "/" as separator, normal interface names can be used. Note also, that settings with variables in the global sysctl files will be applied for every interface!
Further, files with variables are not compatible to the /etc/sysctl.conf file.

EXAMPLES
Settings for "eth0" and "eth0.1" interfaces
	# using "." as separator:
	net.ipv6.conf.eth0.use_tempaddr = 2
	net.ipv6.conf.eth0/1.use_tempaddr = 2
	# using "/" as separator:
	net/ipv6/conf/eth0/use_tempaddr = 2
	net/ipv6/conf/eth0.0/use_tempaddr = 2

COPYRIGHT
Copyright (C) 2022 SUSE Software Solutions Germany GmbH

BUGS
Please report bugs at <https://bugzilla.suse.com/>

AUTHORS
Marius Tomaschewski

SEE ALSO
ifup(8) ifcfg(5) sysctl(8)