ndpd-host(1Mtcp)

ndpd-host -- manage NDP on a host

Synopsis

ndpd-host [-dtv]

Description

The ndpd-host daemon manages aspects of the Neighbor Discovery Protocol (NDP) that are not under the control of the kernel: router discovery, prefix discovery, parameter discovery and redirects. ndpd-host deals with the default route, including default router, default interface and default interface address.

ndpd-host understands the following options:

-d: (Debug) Display exceptional conditions and dump.
-t: Timestamp logged messages.
-v: Log all interesting events (via the daemon.info action in syslog and the console).

Interfaces

ndpd-host understands IEEE, PPP, and CTI point-to-point interfaces. ndpd-host exchanges packets on all known active (up) interfaces which have a link-local address. It can also detect when an interface's status changes. If an interface goes down or loses its link-local address, ndpd-host stops NDP processing on the interface. If an interface comes up, ndpd-host starts NDP processing for it.

IEEE interfaces are configured using the autoconf6(1Mtcp) command. PPP interfaces are configured using the pppd daemon which is controlled using the ppptalk(1M) command. Token negotiation defines the link-local addresses. In order to send Router Advertisements over a CTI-configured tunnel, it must have local and distant link-local addresses.

NOTE: For all active (up) point-to-point interfaces, ndpd-host configures a local route via lo0 for local addresses.

Signals

The operation of ndpd-host may be modified by sending it one of the following signals:

SIGINT: Dump the current state of ndpd-host to syslog or stdout.
SIGTERM: Make ndpd-host clean up and exit.
SIGUSR1: Turn on verbose mode.
SIGUSR2: Turn off verbose mode.

References

autoconf6(1Mtcp), ifconfig(1Mtcp), ndpd-router(1Mtcp), ppptalk(1M), route(1Mtcp)