SunOS man pages : in.ndpd (1)
Maintenance Commands in.ndpd(1M)
NAME
in.ndpd - daemon for IPv6 autoconfiguration
SYNOPSIS
/usr/sbin/in.ndpd [ -adt ] [ -f config_file ]
DESCRIPTION
in.ndpd provides both the host and router autoconfiguration
components of Neighbor Discovery for IPv6 and Stateless
Address Autoconfiguration for IPv6. In particular, in.ndpd
implements
o router discovery;
o prefix discovery;
o parameter discovery; and
o address autoconfiguration. Other aspects of Neighbor
Discovery are implemented by ip6(7P), including:
o address resolution;
o neighbor unreachability detection; and
o redirect.The duplicate address detection function is
implemented by ifconfig(1M).
If the /etc/inet/ndpd.conf file does not exist or does not
set the variable AdvSendAdvertisements to true for a net-
work interface, then in.ndpd will make the node a host for
that interface, that is, sending router solicitation mes-
sages and then using router advertisement messages it
receives to autoconfigure the node. Note that in.ndpd only
autoconfigures the addresses of global or site-local scope
from the prefix advertisement.
If AdvSendAdvertisements is set to true for an interface,
then in.ndpd will perform router functions on that inter-
face, that is, sending router advertisement messages to
autoconfigure the attached hosts, but not use any adver-
tisements it receives for autoconfiguration. However, when
sending advertisements, in.ndpd will use the advertisements
it sends itself to autoconfigure its prefixes. For improved
robustness in.ndpd stores any autoconfigured IPv6 addresses
and their expiration times in state files named
ndpd_state.interface that are located in the /var/inet
directory. Should in.ndpd fail to find any routers, it will
use the state files as a fallback, autoconfiguring those
addresses if the recorded addresses have remaining lifetime.
This ensures that a host that reboots faster than the
routers, for example after a short power failure, will
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Maintenance Commands in.ndpd(1M)
continue using the addresses that it had before the power
failure.
OPTIONS
-a Turn off stateless address auto configuration. When
set, the daemon does not autoconfigure any addresses
and does not renumber any addresses.
-d Turn on large amounts of debugging output on stdout.
When set, the program runs in the foreground and
stays attached to the controlling terminal.
-f config_file
Use config_file for configuration information instead
of the default /etc/inet/ndpd.conf.
-t Turn on tracing (printing) of all sent and received
packets tostdout. When set, the program runs in the
foreground and stays attached to the controlling ter-
minal.
FILES
/etc/inet/ndpd.conf
Configuration file. Not needed on a host but required
on a router to enable in.ndpd to advertise autoconfi-
guration information to the hosts.
/var/inet/ndpd_state.interface
Contains the addresses for interface. The existence of
an address in this file does not imply that the
address is usable, since the address lifetime may have
expired.
ATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:
____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| Availability | SUNWcsu |
|_____________________________|_____________________________|
SEE ALSO
ifconfig(1M), ndpd.conf(4), attributes(5), icmp6(7p),ip6(7p)
attributes(5)
Narten, T., Nordmark, E., Simpson, W., RFC 2461, Neighbor
Discovery for IP Version 6 (IPv6), The Internet Society,
December 1998.
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Maintenance Commands in.ndpd(1M)
Thomson, S., Narten, T., RFC 2462, IPv6 Stateless Address
Autoconfiguration, The Internet Society, December 1998.
DIAGNOSTICS
Receipt of a SIGHUP signal will make in.ndpd restart and
reread /etc/inet/ndpd.conf.
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