.\" Copyright (c) 2012-2013 Apple Inc. All rights reserved. .\" .\" @APPLE_OSREFERENCE_LICENSE_HEADER_START@ .\" .\" This file contains Original Code and/or Modifications of Original Code .\" as defined in and that are subject to the Apple Public Source License .\" Version 2.0 (the 'License'). You may not use this file except in .\" compliance with the License. The rights granted to you under the License .\" may not be used to create, or enable the creation or redistribution of, .\" unlawful or unlicensed copies of an Apple operating system, or to .\" circumvent, violate, or enable the circumvention or violation of, any .\" terms of an Apple operating system software license agreement. .\" .\" Please obtain a copy of the License at .\" http://www.opensource.apple.com/apsl/ and read it before using this file. .\" .\" The Original Code and all software distributed under the License are .\" distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER .\" EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, .\" INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, .\" FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. .\" Please see the License for the specific language governing rights and .\" limitations under the License. .\" .\" @APPLE_OSREFERENCE_LICENSE_HEADER_END@ .\" .\" Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. .\" All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. Neither the name of the project nor the names of its contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .Dd May 17, 1998 .Dt NDP 8 .Os .\" .Sh NAME .Nm ndp .Nd control/diagnose IPv6 neighbor discovery protocol .\" .Sh SYNOPSIS .Nm .Fl a .Op Fl lnt .Nm .Fl A Ar wait .Op Fl nt .Nm .Fl c .Op Fl nt .Nm .Fl d .Op Fl nt .Ar hostname .Nm .Fl f .Op Fl nt .Ar filename .Nm .Fl H .Nm .Fl I .Op Cm delete | Ar interface .Nm .Fl i .Ar interface .Op Ar flags... .Nm .Fl p .Nm .Fl P .Nm .Fl r .Nm .Fl R .Nm .Fl s .Op Fl nt .Ar nodename .Ar ether_addr .Op Li temp .Op Li proxy .\" .Sh DESCRIPTION The .Nm command manipulates the address mapping table used by Neighbor Discovery Protocol (NDP). .Bl -tag -width Ds .It Fl a Dump the currently existing NDP entries. .It Fl A Ar wait Repeat .Fl a (dump NDP entries) every .Ar wait seconds. .It Fl c Erase all the NDP entries. .It Fl d Delete specified NDP entry. .It Fl f Parse the file specified by .Ar filename . .It Fl H Harmonize consistency between the routing table and the default router list; install the top entry of the list into the kernel routing table. .It Fl I Op Cm delete | Ar 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 .Ar interface is specified, the interface will be used as the default. If a special keyword .Ic delete is specified, the current default interface will be deleted from the kernel. .It Fl i Ar interface Op Ar flags... View ND information for the specified interface. If additional arguments .Ar flags are given, .Nm sets or clears the specified flags for the interface. Possible flags are as follows. All of the flags can begin with the special character .Ql - , which means the flag should be cleared. .\" .Bl -tag -width Ds -compact .It Xo .Ic nud .Xc turn on or off NUD (Neighbor Unreachability Detection) on the interface. NUD is usually turned on by default. .It Xo .Ic disabled .Xc 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. .It Xo .Ic proxy_prefixes .Xc the interface is enabled to proxy neighbor discovery for global scope prefixes matching those on link at other interfaces. .It Xo .Ic insecure do not use cryptographically generated addresses (CGA) on this interface. .Xc .It Xo .Ic 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. .Xc .El .It Fl l Show link-layer reachability information. .It Fl n Do not try to resolve numeric address to hostname. .It Fl p Show prefix list. .It Fl P Flush all the entries in the prefix list. .It Fl r Show default router list. .It Fl R Flush all the entries in the default router list. .It Fl s Register an NDP entry for a node. The entry will be permanent unless the word .Li temp is given in the command. If the word .Li proxy is given, this system will act as an proxy NDP server, responding to requests for .Ar hostname even though the host address is not its own. .It Fl t Print timestamp on each entries, to make it possible to merge output with .Xr tcpdump 1 . Most useful when used with .Fl A . .It Fl x Show extended link-layer reachability information in addition to that shown by the .Fl l flag. .It Fl w Show the cryptographically generated address (CGA) parameters for the node. .El .\" .Sh RETURN VALUES The .Nm command will exit with 0 on success, and non-zero on errors. .\" .Sh SEE ALSO .Xr arp 8 .\" .Sh HISTORY The .Nm command first appeared in WIDE Hydrangea IPv6 protocol stack kit. .\" .\" .Sh BUGS .\" (to be written)