rdisc6(8) - phpMan

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RDISC6(8)                   System Manager's Manual                  RDISC6(8)



NAME
       rdisc - ICMPv6 Router Discovery tool

SYNOPSIS
       rdisc6  [-qv]  [-r attempts] [-s source_ip] [-w wait_ms] [IPv6 address]
       <iface>


DESCRIPTON
       RDisc6 is an Unix program which implements the ICMPv6 Router  Discovery
       in  userland  (it is normally done by the kernel). It is used to lookup
       the list of on-link routers and IPv6 prefixes.

       It can also be used to force the kernel to update the state of a  given
       IPv6-autoconfigured network interface.

       The  name  of the network interface to probe routers for must be speci-
       fied.


OPTIONS
       -1 or --single
              Exit as soon as the first advertisement is received.


       -h or --help
              Display some help and exit.


       -m or --multiple
              Wait for possible multiple advertisements and print all of  them
              (default).


       -n or --numeric
              If  the  optional  parameter is not a valid IPv6 address, do not
              try to resolve it as a DNS hostname.


       -q or --quiet
              Only display advertised IPv6 prefixes. Display nothing  in  case
              of failure.  That is mostly useful when calling the program from
              a shell script.


       -r attempts or --retry attempts
              Send ICMPv6 Router Discovery that many times until  a  reply  is
              received,  or  abort. By default, rdisc6 will try 3 times before
              aborting (MAX_RTR_SOLICITATIONS from RFC2461).


       -s source_ip or --source source_ip
              Specify the IPv6 address to be used as the source for the router
              solicitation packets.


       -V or --version
              Display program version and license and exit.


       -v or --verbose
              Display verbose information. That is the default.


       -w wait_ms or --wait wait_ms
              Wait  wait_ms  milliseconds  for a response before retrying.  By
              default, rdisc6 waits 4 second between each attempts (RTR_SOLIC-
              ITATION_INTERVAL from RFC2461).


       If  rdisc6  does not receive any response after the specified number of
       attempts waiting for wait_ms milliseconds each time, it will exit  with
       code  2.  On error, it exits with code 1.  Otherwise it exits with code
       0.


SECURITY
       rdisc6 must be setuid root to allow use by  non  privileged  users.  It
       will drop its root privileges before any attempt is made to send or re-
       ceive data from the network to reduce the possible impact of a security
       vulnerability.


SEE ALSO
       ndisc6(8), ipv6(7)


AUTHOR
       Rmi Denis-Courmont <remi at remlab dot net>

       http://www.remlab.net/ndisc6/



rdisc6                              $Date$                           RDISC6(8)