ndp

Control the IPv6 Neighbor Discovery Protocol

Syntax:

ndp -A wait [-ntl]
ndp -a [-ntl]
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]

Runs on:

QNX Neutrino

Options:

-A wait
Repeat -a (dump NDP entries) every wait seconds.
-a
Dump the existing NDP entries.
-c
Erase all NDP entries.
-d hostname
Delete the NDP entry for this hostname.
-f filename
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]
Show or specify the default interface that's to be used as the default route when there's no default router.
Option: Action:
-I Show the current default interface.
-I delete Delete the current interface from the kernel.
-I interface Use this interface as the default.
-i interface [flags...]
View the neighbor discovery (ND) information for this interface. If flags is specified, set or clear the flag(s) associated with this interface. A flag is cleared if it starts with a hyphen (-). For example, to disable IPv6 on an interface: 
ndp -i interface disabled

To re-enable IPv6 on an interface: 

ndp -i interface -- -disabled

The supported flags include:

  • nud — toggle Neighbor Unreachability Detection on the interface (the default is on)
  • accept_rtadv — specify whether or not to accept Router Advertisement messages received on the interface
  • auto_linklocal — specify whether or not to perform automatic link-local address configuration on interface
  • override_rtadv — specify whether or not to override the net.inet6.ip6.accept_rtadv variable
  • prefer_source — prefer addresses on the interface as candidates of the source address for outgoing packets
  • disabled — disable IPv6 operation on the interface
  • basereachable=number — specify the BaseReachbleTimer on the interface in milliseconds.
  • retrans=number — specify the RetransTimer on the interface in milliseconds.
  • curhlim=number — specify the Cur Hop Limit on the interface
-n
Don't try to resolve a numeric address to a hostname.
-P
Flush all the entries in the prefix list.
-p
Show the prefix list.
-R
Flush all the entries in the default router list.
-r
Show the default router list.
-s nodename ether_addr [temp] [proxy]
Register a permanent NDP entry for this node (use temp to register a temporary entry). If you specify proxy, the system acts as a proxy NDP server that responds to requests for hostname even though the host address is not its own.

Description:

This utility manipulates the address mapping table used by the Neighbor Discovery Protocol (NDP).

Exit status:

0
Successful completion.
Nonzero
An error occurred.
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