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rtradvd.conf(4)						       rtradvd.conf(4)

NAME
       rtradvd.conf - configuration file for router advertisement daemon

DESCRIPTION
       This file describes the information used by rtradvd(1M) when construct‐
       ing IPv6 router advertisement packets for a specific interface as spec‐
       ified  by  RFC 2461 ("Neighbor Discovery for IP Version 6").  This file
       is read by at initialization time or upon reception of signal

       configuration consists of two general statements and  one  substatement
       that  is	 used only by the statement.  All statements and substatements
       must end with a semicolon.  Statements are composed of  keywords	 sepa‐
       rated by white space, which can be any combination of blanks and tabs.

       The  user  may create an entry for each interface that is to be enabled
       for Router Advertisements.  Any configuration information not specified
       in the individual or entry is inherited from the statement.  In absence
       of a statement or specific keywords, the	 values	 of  options  are  set
       according to their default values as defined in RFC-2461.

       The  statement  can  be	used to define global values for both and key‐
       words.  The statement is defined as:

	      defaults {
		# list of interface specific keyword-value pairs;
		# list of prefixinfo specific keyword-value pairs;
	      };

       The statement is defined as:

	      interface interface-name {
		# list of interface specific keyword-value pairs;
		prefixinfo prefix/prefixlen {
		  # list of prefixinfo specific keyword-value pairs;
		};
	      };

       The specifies the "prefix" and "prefix length" to be advertised on that
       interface.

       The  and	 specific  keywords  (if specified) have a precedence over the
       keywords defined in the statement.

       Comments begin with the pound character (#) and continue to the end  of
       the line.

INTERFACE SPECIFIC OPTIONS
       The following basic keywords and values are defined in RFC 2461:

       Enables
	      or  disables  sending  of	 periodic  Router  Advertisements  and
	      responding to Router Solicitations.

	      DEFAULT: off

       Specifies the maximum time, in seconds, between sending unsolicited
	      multicast Router Advertisements from the interface.  Valid  val‐
	      ues  are	between	 4  and	 1800  seconds, inclusive.  When using
	      Mobile IPv6 extension, the minimum valid value allowed drops  to
	      0.07.

	      DEFAULT: 600

       Specifies the minimum time, in seconds, between sending unsolicited
	      multicast	 Router Advertisements from the interface.  Valid val‐
	      ues are between 3 seconds and .75 * inclusive.  The  default  is
	      200  seconds.   When  using  Mobile  IPv6 extension, the minimum
	      valid value allowed drops to 0.03.

	      DEFAULT: 0.33 *

       Enables
	      or disables the setting of the "Managed  Address	Configuration"
	      flag in Router Advertisements.

	      DEFAULT: off

       Enables
	      or  disables  the	 setting of the "Other Stateful Configuration"
	      flag in Router Advertisements.

	      DEFAULT: off

       Specifies the value to be placed in MTU option sent
	      by the router.  A value of zero means unspecified.  When set  to
	      0, does not include the MTU option in Router Advertisements.  It
	      can not be greater than the maximum allowed MTU for  a  specific
	      interface.

	      DEFAULT: 0

       Specifies a time, in milliseconds,that is placed in the Reachable Time
	      field  in	 Router	 Advertisement	messages.   Valid  values  are
	      between 0 and 3,600,000 (1 hour), inclusive.  A  value  of  zero
	      means unspecified by this router.

	      DEFAULT: 0

       Specifies a time, in milliseconds, that is placed in the Retrans
	      Timer  field  in Router Advertisement messages.  A value of zero
	      means unspecified by this router.

	      DEFAULT: 0

       Specifies the value to be placed in the Cur Hop Limit field in
	      Router Advertisement messages sent by the router.	  A  value  of
	      zero means unspecified by this router.

	      DEFAULT: 64

       Specifies a time, in seconds, that is placed in the Router Lifetime
	      field  in	 Router Advertisement messages.	 Valid values are 0 or
	      between and 9000, inclusive.  A value of zero indicates that the
	      router  is  not  to  be  used as a default router and should not
	      appear in the default router list of  the	 host  receiving  this
	      Router Advertisement message.

	      DEFAULT: 3 *

       Enables
	      or  disables  the	 sending  of  the interface link-layer address
	      option in outgoing Router Advertisement messages.

	      DEFAULT: on

       Mobile IPv6 option.
	      Enables or disables setting of the "Home Agent"  flag  field  in
	      Router  Advertisement  messages.	 When  enabled, this indicates
	      that the router sending this Router  Advertisement  messages  is
	      also functioning as a Mobile IPv6 home agent on this link.  When
	      enabled, the minimum values specified by Mobile  IPv6  extension
	      can be used for and

	      DEFAULT: off

       Mobile IPv6 option.
	      Specifies	 the  length  of  time	in  seconds that the router is
	      offering Mobile IPv6 Home Agent service.	The maximum  value  is
	      65520 seconds (18.2 hours).  A value of zero is not allowed.

	      DEFAULT:

       Mobile IPv6 option.
	      Specifies	 a  preference	level  for the home agent sending this
	      Router Advertisement.  Higher values indicate a  home  agent  is
	      more  preferable.	 If both the and are set to their default val‐
	      ues, the Home Agent Information option will not be  included  in
	      Router Advertisement messages sent by this Home Agent router.

	      DEFAULT: 0

       Mobile IPv6 option.
	      Enables  or disable the sending of Advertisement Interval Option
	      in Router Advertisement messages.	 If this option is included in
	      the  message, the minimum limits specified by Mobile IPv6 exten‐
	      sion for and can be used.

	      DEFAULT: off

PREFIX SPECIFIC OPTIONS
       The following address prefix keywords and values	 are  defined  in  RFC
       2461:

       Specifies the valid lifetime of the address prefix, in seconds, to be
	      placed  in outgoing Router Advertisement messages.  The symbolic
	      name represents infinity.

	      DEFAULT: 2592000 seconds (30 days)

       Specifies the preferred lifetime of the address prefix, in seconds, to
	      be placed in outgoing Router Advertisement messages.   The  sym‐
	      bolic name represents infinity.

	      DEFAULT: 604800 seconds (7 days)

       Sets   or  clears  the  On-link	flag  field  in the Prefix Information
	      option.

	      DEFAULT: on

       Sets   or clears the Autonomous Flag field in  the  Prefix  Information
	      option.

	      DEFAULT: on

       Mobile IPv6 prefix option.
	      Sets  or	clear  the Router Flag field in the Prefix Information
	      option.  This indicates that the Prefix field,  in  addition  to
	      advertising the indicated prefix, contains a complete IP address
	      assigned to the sending router.

	      DEFAULT: off

EXAMPLES
       Three example configuration files are shown below for a system that has
       two  interfaces.	 In these examples, the daemon will use default values
       defined in RFC-2461 for those keywords that are not  specified  in  the
       configuration  file.   The second example uses statement to define some
       global keywords for the both interfaces	and  prefixes.	 Finally,  the
       last example shows a Mobile IPv6 example.

   Example 1
	      interface lan1
	      {
		      AdvCurHopLimit	      32;
		      AdvSendAdvertisement    on;
		      prefixinfo 2008:0:0:4::/64
		      {
			      AdvValidLifetime 70100;
			      AdvPreferredLifetime 50200;
		      };
		      prefixinfo 2008:0:0:5::/64
		      {
			      AdvValidLifetime 70100;
			      AdvPreferredLifetime 50200;
		      };
	      };

	      interface lan2
	      {
		      AdvCurHopLimit	      32;
		      AdvRouterLifetime	      0;
		      AdvSendAdvertisement    on;
		      prefixinfo 2008:0:0:6::/64
		      {
			      AdvValidLifetime	    70100;
			      AdvPreferredLifetime 50200;

		      };
	      };

       Example	1  specifies  that the daemon should send Router Advertisement
       messages on both and

       must be (the default is The is set to 32 for both  interfaces  (default
       value  is 64).  The for the second interface is set to 0.  It means the
       receiving hosts should not add this  router  in	their  list  of	 "IPv6
       default router".

   Example 2
	      defaults {
		      AdvCurHopLimit	      32;
		      AdvSendAdvertisement    on;
		      AdvValidLifetime	      70100;
		      AdvPreferredLifetime    50200;
	      };

	      interface lan1
	      {
		      prefixinfo 2008:0:0:4::/64
		      {

		      };
		      prefixinfo 2008:0:0:5::/64
		      {
		      };
	      };

	      interface lan2
	      {
		      AdvRouterLifetime 0;
		      prefixinfo 2008:0:0:6::/64
		      {
		      };
	      };

       Same as Example 1 but using statement.

   Example 3
	      defaults {
		      AdvSendAdvertisement    on;
		      MinRtrAdvInterval	      2;
		      MaxRtrAdvInterval	      5;
		      AdvHomeAgentFlag	      on;
		      AdvHomeAgentLifetime    1200;
		      AdvHomeAgentPreference  3;
		      AdvIntervalOpt	      on;
	      };

	      interface lan1
	      {

		      prefixinfo 2008:0:0:4::/64
		      {

		      };
		      prefixinfo 2008::5:210:83ff:fef7:7a9d/64
		      {
			      AdvRouterAddress on;
		      };
	      };

	      interface lan2
	      {

		      prefixinfo 2008:0:0:6::9/64
		      {
			      AdvRouterAddress	   on;
			      AdvPreferredLifetime 18000;
		      };
	      };

       In this example, the Mobile IPv6 options will be included in the Router
       Advertisement messages.	is turned to also advertise the global address
       of  the	router	on  and	 If  the kernel part of Mobile IPv6 product is
       detected (see mip6mod(7)), the node also acts as "Home Agent"  for  the
       two  prefixes  configured  with	set  on	 and  In this case, the daemon
       enables processing of the four new ICMPv6 messages  defined  by	Mobile
       IPv6 (see rtradvd(1M)).

SEE ALSO
       ndp(1M), rtradvd(1M), mip6mod(7), ndp(7P).

       1. T. Narten, E. Nordmark, W. Simpson, RFC2461 , December 1998.

       2. S. Thompson, T. Narten, RFC2462 , December 1998.

       3. D. Johnson, C. Perkins, IETF document.

							       rtradvd.conf(4)
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