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NDP(8)                    BSD System Manager's Manual                   NDP(8)

NAME
     ndp -- control/diagnose IPv6 neighbor discovery protocol

SYNOPSIS
     ndp -a [-lnt]
     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 routing 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 usu-ally usually
                     ally turned on by default.
             disabled
                     IPv6 can be disabled separately from other network protocols. This flag can be turned
                     on automatically when Duplicate Address Detection (DAD) indicates that another device
                     on the network is using the same link-local address.
             proxy_prefixes
                     the interface is enabled to proxy neighbor discovery for global scope prefixes matching
                     those on link at other interfaces.
             ignore_na
                     ignore neighbor advertisements received on this interface.
             insecure do not use cryptographically generated addresses (CGA) on this interface.

     -l      Show link-layer reachability information.

     -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, respond-ing responding
             ing 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.

     -x      Show extended link-layer reachability information in addition to that shown by the -l flag.

     -w      Show the cryptographically generated address (CGA) parameters for the node.

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