ndp(8) [opendarwin man page]
NDP(8) BSD System Manager's Manual NDP(8) NAME
ndp -- control/diagnose IPv6 neighbor discovery protocol SYNOPSIS
ndp -a [-nt] ndp -A wait [-nt] ndp -c [-nt] ndp -d [-nt] hostname ndp -f [-nt] filename ndp -H ndp -I [delete | interface] ndp -i interface [flags...] ndp -p ndp -P ndp -r ndp -R ndp -s [-nt] nodename ether_addr [temp] [proxy] DESCRIPTION
The ndp command manipulates the address mapping table used by Neighbor Discovery Protocol (NDP). -a Dump the currently existing NDP entries. -A wait Repeat -a (dump NDP entries) every wait seconds. -c Erase all the NDP entries. -d Delete specified NDP entry. -f Parse the file specified by filename. -H Harmonize consistency between the routing table and the default router list; install the top entry of the list into the kernel rout- ing table. -I [delete | interface] Shows or specifies the default interface used as the default route when there is no default router. If no argument is given to the option, the current default interface will be shown. If an interface is specified, the interface will be used as the default. If a special keyword delete is specified, the current default interface will be deleted from the kernel. -i interface [flags...] View ND information for the specified interface. If additional arguments flags are given, ndp sets or clears the specified flags for the interface. Possible flags are as follows. All of the flags can begin with the special character '-', which means the flag should be cleared. nud turn on or off NUD (Neighbor Unreachability Detection) on the interface. NUD is usually turned on by default. -n Do not try to resolve numeric address to hostname. -p Show prefix list. -P Flush all the entries in the prefix list. -r Show default router list. -R Flush all the entries in the default router list. -s Register an NDP entry for a node. The entry will be permanent unless the word temp is given in the command. If the word proxy is given, this system will act as an proxy NDP server, responding to requests for hostname even though the host address is not its own. -t Print timestamp on each entries, to make it possible to merge output with tcpdump(1). Most useful when used with -A. RETURN VALUES
The ndp command will exit with 0 on success, and non-zero on errors. SEE ALSO
arp(8) HISTORY
The ndp command first appeared in WIDE Hydrangea IPv6 protocol stack kit. BSD
May 17, 1998 BSD
Check Out this Related Man Page
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)