RADVD(8)                                                              RADVD(8)

       radvd - router advertisement daemon for IPv6

       radvd [ -hsvc ] [ -d debuglevel ] [ -C configfile ] [ -p pidfile ] [ -m
       logmethod ] [ -l logfile ] [ -f facility ] [ -t chrootdir ] [ -u
       username ]

       radvd is the router advertisement daemon for IPv6. It listens to router
       solicitations and sends router advertisements as described in "Neighbor
       Discovery for IP Version 6 (IPv6)" (RFC 4861).  With these
       advertisements hosts can automatically configure their addresses and
       some other parameters. It also defines "Neighbor Discovery Optimization
       for IPv6 over Low-Power Wireless Personal Area Networks (6LoWPANs)"
       (RFC6775).  They also can choose a default router based on these

       The configuration file must not be writable by others, and if non-root
       operation is requested, not even by self/own group.

       For every one character option there is also a long option, which is
       listed right next to the "short" option name:

       -v, --version
              Displays the version of radvd and then aborts.

       -h, --help
              Displays a short usage description and then aborts.

       -c, --configtest
              Test configuration and do startup tests and then exit.

       -d debuglevel, --debug debuglevel
              With this option you turn on debugging information. The
              debugging level is an integer in the range from 1 to 5, from
              quiet to very verbose. A debugging level of 0 completely turns
              off debugging. If a debugging level greater than 0 is used,
              radvd doesn't background itself on start. The default debugging
              level is 0.

       -C configfile, --config configfile
              Specifies an alternate config file. Normally the compiled in
              default /etc/radvd.conf is used.

       -p pidfile, --pidfile pidfile
              Specifies an alternate pidfile. Normally the compiled in default
              /var/run/radvd.pid is used.

       -m method, --logmethod method
              Specifies the logging method to use. Possibly values are:

              none   Completely disables any logging.

                     Logs to the logfile which is specified by the -l option.
                     If no logfile is specified on the command line, then a
                     compiled in default is used (see next option).

              stderr Logs to standard error.

                     Logs only the high messages (of at least LOG_ERR
                     priority) to standard error, and everything to syslog
                     (default method).

              syslog Logs to syslog.

       -l logfile, --logfile logfile
              Specifies the logfile to use when using the logging method
              logfile.  The default logfile is /var/log/radvd.log.

       -f facility, --facility facility
              Specifies the facility (as an integer) when using syslog
              logging. Default is LOG_DAEMON.

       -t chrootdir, --chrootdir chrootdir
              If specified, switches to chrootdir before doing anything else.
              This directory and its subdirectories must have been populated
              first.  For security reasons, -u must always be used when using

              Note that on Linux radvd requires access to the /proc
              filesystem, so it is more challenging to set up the chroot

       -u username, --username username
              If specified, drops root privileges and changes user ID to
              username and group ID to the primary group of username.  This is
              recommended for security reasons.  You might also need to use -p
              to point to a file in a username -writable directory (e.g.


       There certainly are some bugs. If you find them or have other
       suggestions please contact Reuben Hawkins <reubenhwk@gmail.com>.

       radvd.conf(5), radvdump(8)

       Pedro Roque    <roque@di.fc.ul.pt> - wrote first version for Linux
       Lars Fenneberg <lf@elemental.net>  - previous maintainer
       Nathan Lutchansky   <lutchann@litech.org>    - previous maintainer
       Pekka Savola   <pekkas@netcore.fi>     - previous maintainer
       Craig Metz     <cmetz@inner.net>   - port to NRL's IPv6 code for BSD4.4
       Marko Myllynen <myllynen@lut.fi>   - RFC 2461 update, Mobile IPv6 support
       Jim Paris <jim@jtan.com>      - Privilege separation support
       Reuben Hawkins  <reubenhwk@gmail.com>   - current maintainer
       Pierre Ossman   <pierre@ossman.eu>      - RFC6106 (DNSSL) support
       Varka Bhadram  <varkabhadram@gmail.com> - 6LoWPAN-ND (RFC6775) support
       Robin H. Johnson    <robbat2@gentoo.org>     - RA splitting per RFC 6980 & RFC4861#6.2.3

radvd 2.17                        14 Dec 2010                         RADVD(8)