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 usually turned on by default.
             disabled
                     IPv6 can be disabled separately from other network proto-
                     cols. 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.
             insecure do not use cryptographically generated addresses (CGA)
                     on this interface.
             replicated Address autoconfiguration proceeds under the
                     assumption that interface configuration is replicated by
                     a sleep proxy at another node on the link.  Disables
                     optimistic DAD and sends unsolicited NA with O=1 when DAD
                     completes.  Ignores DAD failures from other hardware
                     addresses.

     -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, 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.

     -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