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ndp(8) [osx man page]

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 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. 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, 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

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

NAME
arp -- address resolution display and control SYNOPSIS
arp [-n] [-i interface] hostname arp [-n] [-i interface] [-l] -a arp -d hostname [pub] [ifscope interface] arp -d [-i interface] -a arp -s hostname ether_addr [temp] [reject] [blackhole] [pub [only]] [ifscope interface] arp -S hostname ether_addr [temp] [reject] [blackhole] [pub [only]] [ifscope interface] arp -f filename DESCRIPTION
The arp utility displays and modifies the Internet-to-Ethernet address translation tables used by the address resolution protocol (arp(4)). With no flags, the program displays the current ARP entry for hostname. The host may be specified by name or by number, using Internet dot notation. Available options: -a The program displays or deletes all of the current ARP entries. -d A super-user may delete an entry for the host called hostname with the -d flag. If the pub keyword is specified, only the ``published'' ARP entry for this host will be deleted. If the ifscope keyword is specified, the entry specific to the interface will be deleted. Alternatively, the -d flag may be combined with the -a flag to delete all entries. -i interface Limit the operation scope to the ARP entries on interface. Applicable only to the following operations: display one, display all, delete all. -l Show link-layer reachability information. -n Show network addresses as numbers (normally arp attempts to display addresses symbolically). -s hostname ether_addr Create an ARP entry for the host called hostname with the Ethernet address ether_addr. The Ethernet address is given as six hex bytes separated by colons. The entry will be permanent unless the word temp is given in the command. If the word pub is given, the entry will be ``published''; i.e., this system will act as an ARP server, responding to requests for hostname even though the host address is not its own. In this case the ether_addr can be given as auto in which case the interfaces on this host will be examined, and if one of them is found to occupy the same subnet, its Ethernet address will be used. If the only keyword is also specified, this will create a ``published (proxy only)'' entry. This type of entry is created automatically if arp detects that a routing table entry for hostname already exists. If the reject keyword is specified the entry will be marked so that traffic to the host will be discarded and the sender will be notified the host is unreachable. The blackhole keyword is similar in that traffic is discarded but the sender is not notified. These can be used to block external traffic to a host without using a firewall. If the ifscope keyword is specified, the entry will set with an additional property that strictly associate the entry to the inter- face. This allows for the presence of mutiple entries with the same destination on different interfaces. -S hostname ether_addr Is just like -s except any existing ARP entry for this host will be deleted first. -f filename Cause the file filename to be read and multiple entries to be set in the ARP tables. Entries in the file should be of the form hostname ether_addr [temp] [pub [only]] [ifscope interface] with argument meanings as given above. Leading whitespace and empty lines are ignored. A '#' character will mark the rest of the line as a comment. -x Show extended link-layer reachability information in addition to that shown by the -l flag. SEE ALSO
inet(3), arp(4), ifconfig(8), ndp(8) HISTORY
The arp utility appeared in 4.3BSD. BSD
March 18, 2008 BSD
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