rtadvctl(8) [freebsd man page]

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

NAME

     rtadvctl -- control program for rtadvd(8) daemon

SYNOPSIS

     rtadvctl [-v] subcommand [interface ...]

DESCRIPTION

     rtadvctl is a utility that communicates with rtadvd(8) daemon and displays information about Router Advertisement messages being sent on each
     interface.

     This utility provides several options and subcommands.  The options are as follows:

     -v      Increase verbosity level.	When specified once, the rtadvctl utility shows additional information about prefixes, RDNSS, and DNSSL
	     options.  When given twice, it additionally shows information about inactive interfaces and some statistics.

     The subcommands are as follows:

     reload [interfaces...]
	     Specifies to reload the configuration file.  If one or more interface is specified, configuration entries for the interfaces will be
	     reloaded selectively.

     enable interfaces...
	     Specifies to mark the interface as enable and to try to reload the configuration entry.  This subcommand is useful for dynamically-
	     added interfaces.

	     The rtadvd(8) daemon marks an interface as enable if the interface exists and the configuration file has a valid entry for that when
	     it is invoked.

     disable interfaces...
	     Specifies to mark the interface as disable.

     shutdown
	     Makes the rtadvd(8) daemon shut down.  Note that the rtadvd(8) daemon will send several RAs with zero lifetime to invalidate the old
	     information on each interface.  It will take at most nine seconds.

     show [interfaces...]
	     Displays information on Router Advertisement messages being sent on each interface.

SEE ALSO

     rtadvd.conf(5), rtadvd(8)

HISTORY

     The rtadvctl command first appeared in FreeBSD 9.0.

AUTHORS

     rtadvctl was written by Hiroki Sato <hrs@FreeBSD.org>.

BSD
								   July 16, 2011							       BSD

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

NAME

     rtadvd -- router advertisement daemon

SYNOPSIS

     rtadvd [-dDfRs] [-c configfile] [-C ctlsock] [-M ifname] [-p pidfile] [interface ...]

DESCRIPTION

     rtadvd sends router advertisement packets to the specified interfaces.  If no interfaces are specified, rtadvd will still run, but will not
     advertise any routes until interfaces are added using rtadvctl(8).

     The program will daemonize itself on invocation.  It will then send router advertisement packets periodically, as well as in response to
     router solicitation messages sent by end hosts.

     Router advertisements can be configured on a per-interface basis, as described in rtadvd.conf(5).

     If there is no configuration file entry for an interface, or if the configuration file does not exist altogether, rtadvd sets all the parame-
     ters to their default values.  In particular, rtadvd reads all the interface routes from the routing table and advertises them as on-link
     prefixes.

     rtadvd also watches the routing table.  If an interface direct route is added on an advertising interface and no static prefixes are speci-
     fied by the configuration file, rtadvd adds the corresponding prefix to its advertising list.

     Similarly, when an interface direct route is deleted, rtadvd will start advertising the prefixes with zero valid and preferred lifetimes to
     help the receiving hosts switch to a new prefix when renumbering.	Note, however, that the zero valid lifetime cannot invalidate the autocon-
     figured addresses at a receiving host immediately.  According to the specification, the host will retain the address for a certain period,
     which will typically be two hours.  The zero lifetimes rather intend to make the address deprecated, indicating that a new non-deprecated
     address should be used as the source address of a new connection.	This behavior will last for two hours.	Then rtadvd will completely remove
     the prefix from the advertising list, and succeeding advertisements will not contain the prefix information.

     Moreover, if the status of an advertising interface changes, rtadvd will start or stop sending router advertisements according to the latest
     status.

     The -s option may be used to disable this behavior; rtadvd will not watch the routing table and the whole functionality described above will
     be suppressed.

     Basically, hosts MUST NOT send Router Advertisement messages at any time (RFC 4861, Section 6.2.3).  However, it would sometimes be useful to
     allow hosts to advertise some parameters such as prefix information and link MTU.	Thus, rtadvd can be invoked if router lifetime is explic-
     itly set zero on every advertising interface.

     The command line options are:

     -c      Specify an alternate location, configfile, for the configuration file.  By default, /etc/rtadvd.conf is used.

     -C      Specify an alternate location for the control socket used by rtadvctl(8).	The default is /var/run/rtadvd.sock.

     -d      Print debugging information.

     -D      Even more debugging information is printed.

     -f      Foreground mode (useful when debugging).  Log messages will be dumped to stderr when this option is specified.

     -M      Specify an interface to join the all-routers site-local multicast group.  By default, rtadvd tries to join the first advertising
	     interface appearing on the command line.  This option has meaning only with the -R option, which enables routing renumbering protocol
	     support.

     -p      Specify an alternative file in which to store the process ID.  The default is /var/run/rtadvd.pid.

     -R      Accept router renumbering requests.  If you enable it, certain IPsec setup is suggested for security reasons.  This option is cur-
	     rently disabled, and is ignored by rtadvd with a warning message.

     -s      Do not add or delete prefixes dynamically.  Only statically configured prefixes, if any, will be advertised.

     Use SIGHUP to reload the configuration file /etc/rtadvd.conf.  If an invalid parameter is found in the configuration file upon the reload,
     the entry will be ignored and the old configuration will be used.	When parameters in an existing entry are updated, rtadvd will send Router
     Advertisement messages with the old configuration but zero router lifetime to the interface first, and then start to send a new message.

     Use SIGTERM to kill rtadvd gracefully.  In this case, rtadvd will transmit router advertisement with router lifetime 0 to all the interfaces
     (in accordance with RFC 4861 6.2.5).

FILES

     /etc/rtadvd.conf		       The default configuration file.
     /var/run/rtadvd.pid	       The default process ID file.

EXIT STATUS

     The rtadvd utility exits 0 on success, and >0 if an error occurs.

SEE ALSO

     rtadvd.conf(5), rtadvctl(8), rtsol(8)

     Thomas Narten, Erik Nordmark, W. A. Simpson, and Hesham Soliman, Neighbor Discovery for IP version 6 (IPv6), RFC 4861.

     Thomas Narten, Erik Nordmark, and W. A. Simpson, Neighbor Discovery for IP version 6 (IPv6), RFC 2461 (obsoleted by RFC 4861).

     Richard Draves, Default Router Preferences and More-Specific Routes, draft-ietf-ipngwg-router-selection-xx.txt.

     J. Jeong, S. Park, L. Beloeil, and S. Madanapalli, IPv6 Router Advertisement Options for DNS Configuration, RFC 6106.

HISTORY

     The rtadvd command first appeared in the WIDE Hydrangea IPv6 protocol stack kit.

BUGS

     There used to be some text that recommended users not to let rtadvd advertise Router Advertisement messages on an upstream link to avoid
     undesirable icmp6(4) redirect messages.  However, based on the later discussion in the IETF ipng working group, all routers should rather
     advertise the messages regardless of the network topology, in order to ensure reachability.

BSD
								 February 25, 2013							       BSD