1RADVD(8) RADVD(8)
2
6 radvd - router advertisement daemon for IPv6
7
9 radvd [ -vh ] [ -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 2461). 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 -d debuglevel, --debug debuglevel
43 With this option you turn on debugging information. The debug‐
44 ging level is an integer in the range from 1 to 5, from quiet
45 to very verbose. A debugging level of 0 completely turns off
46 debugging. If a debugging level greater than 0 is used, radvd
47 doesn't background itself on start. The default debugging level
48 is 0.
49 -C configfile, --config configfile
51 Specifies an alternate config file. Normally the compiled in
52 default /etc/radvd.conf is used.
53 -p pidfile, --pidfile pidfile
55 Specifies an alternate pidfile. Normally the compiled in default
56 /var/run/radvd/radvd.pid is used.
57 -m method, --logmethod method
59 Specifies the logging method to use. Possibly values are:
60 none Completely disables any logging.
62 logfile
64 Logs to the logfile which is specified by the -l option.
65 If no logfile is specified on the command line, then a
66 compiled in default is used (see next option).
67 stderr Logs to standard error.
69 stderr_syslog
71 Logs only the high messages (of at least LOG_ERR prior‐
72 ity) to standard error, and everything to syslog (default
73 method).
74 syslog Logs to syslog.
76 -l logfile, --logfile logfile
78 Specifies the logfile to use when using the logging method log‐
79 file. The default logfile is /var/log/radvd.log.
80 -f facility, --facility facility
82 Specifies the facility (as an integer) when using syslog log‐
83 ging. Default is LOG_DAEMON.
84 -t chrootdir, --chrootdir chrootdir
86 If specified, switches to chrootdir before doing anything else.
87 This directory and its subdirectories must have been populated
88 first. For security reasons, -u must always be used when using
89 chrootdir.
90 Note that on Linux radvd requires access to the /proc filesys‐
92 tem, so it is more challenging to set up the chroot environment.
93 -u username, --username username
95 If specified, drops root privileges and changes user ID to user‐
96 name and group ID to the primary group of username. This is
97 recommended for security reasons. You might also need to use -p
98 to point to a file in a username -writable directory (e.g.
99 /var/run/radvd/radvd.pid).
100
102 /usr/sbin/radvd
103 /etc/radvd.conf
104 /var/run/radvd/radvd.pid
105 /var/log/radvd.log
106
108 There certainly are some bugs. If you find them or have other sugges‐
109 tions please contact Pekka Savola <pekkas@netcore.fi>.
110
113 radvd.conf(5), radvdump(8)
114
116 Pedro Roque <roque@di.fc.ul.pt> - wrote first version for Linux
117 Lars Fenneberg <lf@elemental.net> - previous maintainer
118 Nathan Lutchansky <lutchann@litech.org> - previous maintainer
119 Pekka Savola <pekkas@netcore.fi> - current maintainer
120 Craig Metz <cmetz@inner.net> - port to NRL's IPv6 code for BSD4.4
121 Marko Myllynen <myllynen@lut.fi> - RFC 2461 update, Mobile IPv6 support
122radvd 1.0 29 Mar 2001 RADVD(8)