1RADVD(8) RADVD(8)
2
6 radvd - router advertisement daemon for IPv6
7
9 radvd [ -hsvc ] [ -d debuglevel ] [ -C configfile ] [ -p pidfile ] [ -m
10 logmethod ] [ -l logfile ] [ -f facility ] [ -t chrootdir ] [ -u user‐
11 name ]
12
15 radvd is the router advertisement daemon for IPv6. It listens to router
16 solicitations and sends router advertisements as described in "Neighbor
17 Discovery for IP Version 6 (IPv6)" (RFC 4861). With these advertise‐
18 ments hosts can automatically configure their addresses and some other
19 parameters. They also can choose a default router based on these adver‐
20 tisements.
21 Note that if debugging is not enabled, radvd will not start if IPv6
23 forwarding is disabled. IPv6 forwarding can be controlled via
24 sysctl(8), net.ipv6.conf.all.forwarding on Linux or net.inet6.ip6.for‐
25 warding on BSD.
26 Similarly, the configuration file must not be writable by others, and
28 if non-root operation is requested, not even by self/own group.
29
32 For every one character option there is also a long option, which is
33 listed right next to the "short" option name:
34 -v, --version
37 Displays the version of radvd and then aborts.
38 -h, --help
40 Displays a short usage description and then aborts.
41 -s, --singleprocess
43 On Linux if username is specified, privilege separation is
44 enabled and there will be two processes. This option disables
45 privilege separation, and as a result, the non-privileged radvd
46 process does not have permissions to change interface configura‐
47 tion.
48 -c, --configtest
50 Test configuration and do startup tests and then exit.
51 -d debuglevel, --debug debuglevel
53 With this option you turn on debugging information. The debug‐
54 ging level is an integer in the range from 1 to 5, from quiet
55 to very verbose. A debugging level of 0 completely turns off
56 debugging. If a debugging level greater than 0 is used, radvd
57 doesn't background itself on start. The default debugging level
58 is 0.
59 -C configfile, --config configfile
61 Specifies an alternate config file. Normally the compiled in
62 default /etc/radvd.conf is used.
63 -p pidfile, --pidfile pidfile
65 Specifies an alternate pidfile. Normally the compiled in default
66 /var/run/radvd/radvd.pid is used.
67 -m method, --logmethod method
69 Specifies the logging method to use. Possibly values are:
70 none Completely disables any logging.
72 logfile
74 Logs to the logfile which is specified by the -l option.
75 If no logfile is specified on the command line, then a
76 compiled in default is used (see next option).
77 stderr Logs to standard error.
79 stderr_syslog
81 Logs only the high messages (of at least LOG_ERR prior‐
82 ity) to standard error, and everything to syslog (default
83 method).
84 syslog Logs to syslog.
86 -l logfile, --logfile logfile
88 Specifies the logfile to use when using the logging method log‐
89 file. The default logfile is /var/log/radvd.log.
90 -f facility, --facility facility
92 Specifies the facility (as an integer) when using syslog log‐
93 ging. Default is LOG_DAEMON.
94 -t chrootdir, --chrootdir chrootdir
96 If specified, switches to chrootdir before doing anything else.
97 This directory and its subdirectories must have been populated
98 first. For security reasons, -u must always be used when using
99 chrootdir.
100 Note that on Linux radvd requires access to the /proc filesys‐
102 tem, so it is more challenging to set up the chroot environment.
103 -u username, --username username
105 If specified, drops root privileges and changes user ID to user‐
106 name and group ID to the primary group of username. This is
107 recommended for security reasons. You might also need to use -p
108 to point to a file in a username -writable directory (e.g.
109 /var/run/radvd/radvd.pid).
110
112 /usr/sbin/radvd
113 /etc/radvd.conf
114 /var/run/radvd/radvd.pid
115 /var/log/radvd.log
116
118 There certainly are some bugs. If you find them or have other sugges‐
119 tions please contact Pekka Savola <pekkas@netcore.fi>.
120
123 radvd.conf(5), radvdump(8)
124
126 Pedro Roque <roque@di.fc.ul.pt> - wrote first version for Linux
127 Lars Fenneberg <lf@elemental.net> - previous maintainer
128 Nathan Lutchansky <lutchann@litech.org> - previous maintainer
129 Pekka Savola <pekkas@netcore.fi> - current maintainer
130 Craig Metz <cmetz@inner.net> - port to NRL's IPv6 code for BSD4.4
131 Marko Myllynen <myllynen@lut.fi> - RFC 2461 update, Mobile IPv6 support
132 Jim Paris <jim@jtan.com> - Privilege separation support
133 Reuben Hawkins <reubenhwk@gmail.com> - Many fixes and cleanups
134 Pierre Ossman <pierre@ossman.eu> - RFC6106 (DNSSL) support
135radvd 1.8.2 14 Dec 2010 RADVD(8)