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 rtradvd(1M)                                                     rtradvd(1M)

 NAME    [Toc]    [Back]
      rtradvd - Router Advertisement daemon for IPv6

 SYNOPSIS    [Toc]    [Back]
      rtradvd [-C] [-c configfile] [-d debuglevel] [-i] [-p pidfile]

 DESCRIPTION    [Toc]    [Back]
      rtradvd, the router advertisement daemon for IPv6, implements router
      functionality as specified by RFC 2461 ("Neighbor Discovery for IP
      Version 6").  The daemon listens to router solicitation and sends
      router advertisement messages on demand and periodically as described
      in "Neighbor Discovery for IP Version 6".  These advertisements allow
      any listening host to configure their addresses and some other
      parameters automatically without manual intervention.  They can also
      choose a default router based on these advertisements.

      Router advertisement is configured on a per interface basis, as
      described in rtradvd.conf(4).  The "PRIVATE" flag (IFF_PRIVATE) on
      each interface must be cleared in order to enable sending Router
      Advertisement packets out on that particular interface as described by
      ifconfig(1M).  The daemon does not listen on an interface when the
      "PRIVATE" flag is set.

      rtradvd also implements four new Mobile IPv6 ICMPv6 message types, two
      for use in the dynamic home agent address discovery mechanism, and two
      for mobile configuration mechanisms.  These four new ICMPv6 messages
      are activated if "Home Agent Flag" (see rtradvd.conf(4)) is enabled on
      any configured interface and the daemon detects the Mobile IPv6 kernel
      module during startup (see mip6mod(7)) or via mip6admin(1M) utility.
      In this case, rtradvd sends mip6mod the list of prefixes configured
      with the "Router Address Flag" set to on, allowing the node to act as
      a home agent on all the links corresponding to these prefixes (see

    Options    [Toc]    [Back]
           -C             Specifies that the configuration file will be
                          parsed for syntax errors and coherency.  Any
                          syntax error or incoherency data is printed to
                          stderr.  rtradvd will exit with a status 1 if
                          there were any errors or 0 (zero) if there were
                          not.  All other command line options except -c are

           -c configfile  Use a configuration file other than

           -d debuglevel  Print debugging information.  If debugfile is not
                          specified, the daemon stays in foreground mode.  A
                          number after the d determines the level of
                          messages printed.  The level must be an integer in

 Hewlett-Packard Company            - 1 -      HP-UX 11i Version 2: Sep 2004

 rtradvd(1M)                                                     rtradvd(1M)

                          the range from 1 to 10, with higher numbers
                          resulting in greater detail in debug messages.

           -i             Disable printing the inconsistency information via
                          syslog(3C) in router advertisement messages
                          received from other routers on the link.

           -p pidfile     Use a pid file other than /var/run/rtradvd.pid.

           debugfile      Specifies a debug file in which to place debug
                          information.  If a debug file is specified on the
                          command line, rtradvd detaches from the terminal
                          and runs in the background.  Otherwise, rtradvd
                          assumes that debugging is desired to stderr and
                          remains in the foreground.

      The rtradvd daemon includes Mobile IPv6 options in Router
      Advertisement messages when the configuration file contains the
      specific Mobile IPv6 keywords (see rtradvd.conf(4)).

      The rtradvd daemon can be started during boot-time initialization.  To
      do so, see /etc/rc.config.d/netconf-ipv6 for rtradvd entries.

      The following signals have the specified effect when sent to the
      server process using the kill(1) command:

           SIGHUP       causes rtradvd to read the configuration file and
                        reload the database.  If the configuration file
                        contains an error or inconsistency, the daemon
                        continues with the old configuration database.  The
                        syslog file should be checked for errors.

           SIGTERM      terminates rtradvd gracefully.  In this case, before
                        exiting, rtradvd will transmit router advertisement
                        with Router Lifetime 0 to all the listening
                        interfaces.  This can take up to 10 seconds.

 DIAGNOSTICS    [Toc]    [Back]
      Any errors encountered by rtradvd in the configuration file, or in
      normal operation are logged via syslog(3C).

 NOTE    [Toc]    [Back]
      The following ICMPv6 types are assigned for Mobile IPv6:

           Home Agent Address Discovery Request: ICMPv6 type 144
           Home Agent Address Discovery Reply: ICMPv6 type 145
           Mobile Prefix Solicitation: ICMPv6 type 146
           Mobile Prefix Advertisement: ICMPv6 type 147

      Refer to the Mobile IPv6 Administrator's Guide for information on
      configuring Virtual IPv6 Anycast addresses.

 Hewlett-Packard Company            - 2 -      HP-UX 11i Version 2: Sep 2004

 rtradvd(1M)                                                     rtradvd(1M)

 AUTHOR    [Toc]    [Back]
      rtradvd was developed by HP.

 FILES    [Toc]    [Back]
      /etc/rtradvd.conf                The default configuration file

      /var/run/rtradvd.pid             Process ID of running rtradvd

      /etc/rc.config.d/netconf-ipv6    To enable rtradvd at system

 SEE ALSO    [Toc]    [Back]
      kill(1), ifconfig(1M), mip6admin(1M), syslog(3C), rtradvd.conf(4),
      mip6mod(7), ndp(7P).

      1. T. Narten, E. Nordmark, W. Simpson, Neighbor Discovery for IP
         Version 6 (IPv6), RFC2461, December 1998.

      2. S. Thompson, T. Narten, IPv6 Stateless Address Autoconfiguration,
         RFC2462, December 1998.

      3. D. Johnson, C. Perkins, Mobility Support in IPv6, IETF document.

 Hewlett-Packard Company            - 3 -      HP-UX 11i Version 2: Sep 2004
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