ifndp-proxy man page on SuSE

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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)
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