ifsysctl(5) [suse man page]

IFSYSCTL(5)						       Network configuration						       IFSYSCTL(5)

NAME

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

SYNOPSIS

       /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 = 1
       or
	    net.ipv4.conf.eth0.rp_filter = 0

       The settings are applied by the /etc/sysconfig/network/scripts/ifup-sysctl script executed via /etc/udev/rules.d/77-network.rules rule (see
       udev(7)),  after  the  creation	and  after  the rename of the interface name to its persistent name (when applicable), but before the ifup
       <interface name> -o hotplug may be executed to configure the interface.

       The settings are not applied by default when the NetworkManager is active (NETWORKMANAGER=yes), except when the IFSYSCTL_NETWORKMANAGER=yes
       variable is set in the /etc/sysconfig/network/config file.

       Settings from the ifsysctl- file are applied every time an interface has been created.

       Settings from the ifsysctl-interface name file are applied when the interface with the corresponding interface name has been created.

SYNTAX

       The  sysctl(8) utility is required to apply the settings. It supports two separator characters for sysctl keywords: a "." in default format
       and a "/" in the alternate format.  Therefore the syntax is basically same to 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 key-
       word, has to be replaced with a "/". In the alternate sysctl format with "/" as separator, normal interface names can be used.

       Optionally,  the ifsysctl files may contain also the $INTERFACE and the $SYSCTL_IF variables, that are automatically replaced with the cur-
       rent interface name usable in the alternate format and with the sysctl-quoted interface name for the default format,  before  the  settings
       are passed to the sysctl utility.

       Note also, that settings with variables in the ifsysctl (without the -<interface name> suffix), 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 = 1
	    net.ipv6.conf.eth0/1.use_tempaddr = 1

	    # using "/" as separator:
	    net/ipv6/conf/eth0/use_tempaddr = 1
	    net/ipv6/conf/eth0.0/use_tempaddr = 1

       Settings with variables:
	    # using "." as separator:
	    net.ipv6.conf.$SYSCTL_IF.use_tempaddr = 1

	    # using "/" as separator:
	    net/ipv6/conf/$INTERFACE/use_tempaddr = 1

       To test your ifsysctl-eth0 or ifsysctl file, use:
	    /etc/sysconfig/network/scripts/ifup-sysctl eth0 -o debug

BUGS

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

AUTHOR

       Marius Tomaschewski <mt@suse.de>

SEE ALSO

       ifup(8) ifcfg(5) sysctl(8)

sysconfig							   December 2009						       IFSYSCTL(5)

IFNDP-PROXY(5)						       Network configuration						    IFNDP-PROXY(5)

NAME

       ifndp-proxy[-<interface name>] - IPv6 NDP and IPv4 ARP proxy entries

SYNOPSIS

       /etc/sysconfig/network/ifndp-proxy
       /etc/sysconfig/network/ifndp-proxy-<interface name>

DESCRIPTION

       These  files  contain  IPv6  NDP and IPv4 ARP proxy settings, that should be applied using the ip neigh add proxy command documented in the
       ip(8) manual page that provides a common interface for IPv4 and IPv6.

       The NDP/ARP proxy is required, e.g. when IP addresses from the same subnet have to be used on the interface of  the  host  as  well  as	on
       interfaces behind a (tunnel) interface and using a bridge is not an option.

       Don't forget to enable forwarding and the NDP/ARP proxy by setting
	    net.ipv6.conf.<all|default|interface name>.proxy_ndp = 1
	    net.ipv6.conf.<all|default|interface name>.forwarding = 1
       and/or
	    net.ipv4.conf.<all|default|interface name>.proxy_arp = 1
	    net.ipv4.conf.<all|default|interface name>.forwarding = 1
       or
	    net.ipv4.ip_forward = 1
       either as global all setting in the /etc/sysctl.conf file or using the ifsysctl(5) files, that allow per-interface setup.
       Forwarding can be also enabled in the /etc/sysconfig/sysctl file using the IP_FORWARD and IPV6_FORWARD variables.

       The proxy entries are added and deleted using the      if-{up|down}.d/ndp-proxy script, every time after an involved interface has been set
       up or down.

SYNTAX

       The format of the ifndp-proxy file is:
       <address> <address interface>	 <proxy interface list>

       The format of the ifndp-proxy-<address interface> file is same to above, but allows also to omit the address interface by using	a  "-"	as
       placeholder inside of the file, because it is already available in the file name:
       <address> <address interface | -> <proxy interface list>

       Lines beginning with # and blank lines are ignored.

       Each  line  defines  to	add a proxy NDP/ARP entry with the address of or behind address interface to all interfaces in the proxy interface
       list.

EXAMPLES

       Let's assume, your machine is connected via eth0 to a switch with the networks 2001:db8:abba::/64 and 192.168.100.1/24 and is using the	IP
       address 1 itself. You'd like to use the addresses 11 and 12 e.g. for virtual machines behind the tap1 and tap2 interface, that is:
	    2001:db8:abba::1/64       -- local eth0 address
	    2001:db8:abba::11/64      -- address behind tap1
	    2001:db8:abba::12/64      -- address behind tap2
	    192.168.100.1/24	      -- local eth0 address
	    192.168.100.11/24	      -- address behind tap1
	    192.168.100.12/24	      -- address behind tap2
       then set up the following entries in the ifndp-proxy file:
	    2001:db8:abba::1	      eth0     tap1 tap2
	    2001:db8:abba::11	      tap1     eth0 tap2
	    2001:db8:abba::12	      tap2     eth0 tap1
	    192.168.100.1	      eth0    tap1 tap2
	    192.168.100.11	      tap1    eth0 tap2
	    192.168.100.12	      tap2    eth0 tap1
       additionally to the routing entries in the routes or ifroute-<interface name> files.

BUGS

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

AUTHOR

       Marius Tomaschewski <mt@suse.de>

SEE ALSO

       ifup(8) ifcfg(5) ifsysctl(8)

sysconfig							   December 2009						    IFNDP-PROXY(5)