Home Man
Search
Today's Posts
Register

Linux & Unix Commands - Search Man Pages

RedHat 9 (Linux i386) - man page for radvd.conf (redhat section 5)

RADVD.CONF(5)									    RADVD.CONF(5)

NAME
       radvd.conf - configuration file of the router advertisement daemon radvd

DESCRIPTION
       This  file describes the information which is included in the router advertisement (RA) of
       a specific interface.

       The file contains one or more interface definitions of the form:

       interface name {
	    list of interface specific options
	    list of prefix definitions
       };

       All the possible interface specific options are detailed below.	Each  option  has  to  be
       terminated by a semicolon.

       Prefix definitions are of the form:

       prefix prefix/length {
	    list of prefix specific options
       };

       Prefix  can  be	network prefix or the address of the inferface.  The address of interface
       should be used when using Mobile IPv6 extensions.

       All the possible prefix specific options are described below.  Each option has to be  ter-
       minated by a semicolon.

       Decimal values are allowed only for MaxRtrAdvInterval and MinRtrAdvInterval.  Decimal val-
       ues should be used only when using Mobile IPv6 extensions.

INTERFACE SPECIFIC OPTIONS
       AdvSendAdvert on|off

	      A flag indicating whether or not the router sends  periodic  router  advertisements
	      and responds to router solicitations.

	      This  option  no	longer has to be specified first, but it needs to be on to enable
	      advertisement on this interface.

	      Default: off

       UnicastOnly on|off

	      Indicates that the interface link type only supports unicast.   This  will  prevent
	      unsolicited advertisements from being sent, and will cause solicited advertisements
	      to be unicast to the soliciting node.  This option is necessary for  non-broadcast,
	      multiple-access links, such as ISATAP.

	      Default: off

       MaxRtrAdvInterval seconds

	      The  maximum  time  allowed between sending unsolicited multicast router advertise-
	      ments from the interface, in seconds.

	      Must be no less than 4 seconds and no greater than 1800 seconds.

	      Minimum when using Mobile IPv6 extensions: 1.5.

	      Default: 600 seconds

       MinRtrAdvInterval seconds

	      The minimum time allowed between sending unsolicited  multicast  router  advertise-
	      ments from the interface, in seconds.

	      Must be no less than 3 seconds and no greater than 0.75 * MaxRtrAdvInterval.

	      Minimum when using Mobile IPv6 extensions: 0.05.

	      Default: 0.33 * MaxRtrAdvInterval

       AdvManagedFlag on|off

	      When set, hosts use the administered (stateful) protocol for address autoconfigura-
	      tion in addition to any addresses autoconfigured using stateless	address  autocon-
	      figuration.  The use of this flag is described in RFC 2462.

	      Default: off

       AdvOtherConfigFlag on|off

	      When  set,  hosts use the administered (stateful) protocol for autoconfiguration of
	      other (non-address) information.	The use of this flag is described in RFC 2462.

	      Default: off

       AdvLinkMTU integer

	      The MTU option is used in  router advertisement messages to insure that  all  nodes
	      on  a  link  use	the  same MTU value in those cases where the link MTU is not well
	      known.

	      If specified, i.e. not 0, must not be smaller than 1280 and not  greater	than  the
	      maximum MTU allowed for this link (e.g. ethernet has a maximum MTU of 1500. See RFC
	      2464).

	      Default: 0

       AdvReachableTime milliseconds

	      The time, in milliseconds, that a node assumes a neighbor is reachable after having
	      received	a  reachability confirmation.  Used by the Neighbor Unreachability Detec-
	      tion algorithm (see Section 7.3 of RFC 2461).  A value of  zero  means  unspecified
	      (by this router).

	      Must be no greater than 3,600,000 milliseconds (1 hour).

	      Default: 0

       AdvRetransTimer milliseconds

	      The  time,  in  milliseconds, between retransmitted Neighbor Solicitation messages.
	      Used by address resolution and the Neighbor Unreachability Detection algorithm (see
	      Sections	7.2  and  7.3  of  RFC 2461).  A value of zero means unspecified (by this
	      router).

	      Default: 0

       AdvCurHopLimit integer

	      The default value that should be placed in the Hop Count field of the IP header for
	      outgoing	(unicast) IP packets.  The value should be set to the current diameter of
	      the Internet.  The value zero means unspecified (by this router).

	      Default: 64

       AdvDefaultLifetime seconds

	      The lifetime associated with the default router in units of seconds.   The  maximum
	      value  corresponds to 18.2 hours.  A lifetime of 0 indicates that the router is not
	      a default router and should not appear on the  default  router  list.   The  router
	      lifetime	applies  only to the router's usefulness as a default router; it does not
	      apply to information contained in other message fields or  options.   Options  that
	      need time limits for their information include their own lifetime fields.

	      Must be either zero or between MaxRtrAdvInterval and 9000 seconds.

	      Default: 3 * MaxRtrAdvInterval

       AdvSourceLLAddress on|off

	      When set, the link-layer address of the outgoing interface is included in the RA.

	      Default: on

       AdvHomeAgentFlag on|off

	      When set, indicates that sending router is able to serve as Mobile IPv6 Home Agent.
	      When set, minimum limits specified by Mobile IPv6 are  used  for	MinRtrAdvInterval
	      and MaxRtrAdvInterval.

	      Default: off

       AdvHomeAgentInfo on|off

	      When  set,  Home Agent Information Option (specified by Mobile IPv6) is included in
	      Router Advertisements.  AdvHomeAgentFlag must also be set when using this option.

	      Default: off

       HomeAgentLifetime seconds

	      The length of time in seconds (relative to the time the packet is  sent)	that  the
	      router  is  offering  Mobile IPv6 Home Agent services.  A value 0 must not be used.
	      The maximum lifetime is 65520 seconds (18.2 hours).  This  option  is  ignored,  if
	      AdvHomeAgentInfo is not set.

	      If  both HomeAgentLifetime and HomeAgentPreference are set to their default values,
	      Home Agent Information Option will not be sent.

	      Default: AdvDefaultLifetime

       HomeAgentPreference integer

	      The preference for the  Home  Agent  sending  this  Router  Advertisement.   Values
	      greater  than  0	indicate  more preferable Home Agent, values less than 0 indicate
	      less preferable Home Agent.  This option is ignored,  if	AdvHomeAgentInfo  is  not
	      set.

	      If  both HomeAgentLifetime and HomeAgentPreference are set to their default values,
	      Home Agent Information Option will not be sent.

	      Default: 0

       AdvIntervalOpt on|off

	      When set, Advertisement Interval Option (specified by Mobile IPv6) is  included  in
	      Router  Advertisements.  When set, minimum limits specified by Mobile IPv6 are used
	      for MinRtrAdvInterval and MaxRtrAdvInterval.

	      Default: off

PREFIX SPECIFIC OPTIONS
       AdvOnLink on|off

	      When set, indicates that this prefix can be used for on-link  determination.   When
	      not  set	the advertisement makes no statement about on-link or off-link properties
	      of the prefix.  For instance, the prefix might be used  for  address  configuration
	      with  some  of the addresses belonging to the prefix being on-link and others being
	      off-link.

	      Default: on

       AdvAutonomous on|off

	      When set, indicates that this prefix can be used for autonomous address  configura-
	      tion as specified in RFC 2462.

	      Default: on

       AdvRouterAddr on|off

	      When  set,  indicates that the address of interface is sent instead of network pre-
	      fix, as is required by Mobile IPv6.  When set, minimum limits specified  by  Mobile
	      IPv6 are used for MinRtrAdvInterval and MaxRtrAdvInterval.

	      Default: off

       AdvValidLifetime seconds|infinity

	      The  length  of  time in seconds (relative to the time the packet is sent) that the
	      prefix is valid for the purpose  of  on-link  determination.   The  symbolic  value
	      infinity	represents  infinity  (i.e.  a	value of all one bits (0xffffffff)).  The
	      valid lifetime is also used by RFC 2462.

	      Default: infinity

       AdvPreferredLifetime seconds|infinity

	      The length of time in seconds (relative to  the  time  the  packet  is  sent)  that
	      addresses  generated from the prefix via stateless address autoconfiguration remain
	      preferred.  The symbolic value infinity represents infinity (i.e. a  value  of  all
	      one bits (0xffffffff)).  See RFC 2462.

	      Default: 604800 seconds (7 days)

       Base6to4Interface name

	      If  this option is specified, this prefix will be combined with the IPv4 address of
	      interface name to produce a valid 6to4 prefix. The first 16  bits  of  this  prefix
	      will  be	replaced  by 2002 and the next 32 bits of this prefix will be replaced by
	      the IPv4 address assigned to interface name at configuration time. The remaining 80
	      bits  of	the  prefix (including the SLA ID) will be advertised as specified in the
	      configuration file.  See the next section for an example.

	      If interface name is not available at configuration time, a warning will be written
	      to the log and this prefix will be disabled until radvd is reconfigured.

	      This  option enables systems with dynamic IPv4 addresses to update their advertised
	      6to4 prefixes simply by restarting radvd or sending a SIGHUP signal to cause  radvd
	      to reconfigure itself.

	      Note  that 6to4 prefixes derived from dynamically-assigned IPv4 addresses should be
	      advertised with a significantly shorter  lifetime  (see  the  AdvValidLifetime  and
	      AdvPreferredLifetime options).

	      For more information on 6to4, see RFC 3056.

	      Default: 6to4 is not used

EXAMPLES
       interface eth0
       {
	       AdvSendAdvert on;
	       prefix fec0:0:0:1::/64
	       {
		       AdvOnLink on;
		       AdvAutonomous on;
	       };
       };

       It  says  that router advertisement daemon should advertise (AdvSendAdvert on;) the prefix
       fec0:0:0:1:: which has a lenght of 64 on the interface eth0.  Also the  prefix  should  be
       marked  as  autonomous  (AdvAutonomous on;) and as on-link (AdvOnLink on;).  All the other
       options are left on their default values.

       To support movement detection of Mobile IPv6 Mobile Nodes, the address of interface should
       be used instead of network prefix:

       interface eth0
       {
	       AdvSendAdvert on;
	       prefix fec0:0:0:1::4/64
	       {
		       AdvOnLink on;
		       AdvAutonomous on;
		       AdvRouterAddr on;
	       };
       };

       For  6to4 support, include the Base6to4Interface option in each prefix section. When using
       a dynamic IPv4 address, set  small  prefix  lifetimes  to  prevent  hosts  from	retaining
       unreachable prefixes after a new IPv4 address has been assigned.

       interface eth0
       {
	       AdvSendAdvert on;

	       # Advertise at least every 30 seconds
	       MaxRtrAdvInterval 30;

	       prefix 0:0:0:5678::/64
	       {
		       AdvOnLink on;
		       AdvAutonomous on;
		       Base6to4Interface ppp0;

		       # Very short lifetimes for dynamic addresses
		       AdvValidLifetime 300;
		       AdvPreferredLifetime 120;
	       };
       };

       Since  6to4  is	enabled, the prefix will be advertised as 2002:WWXX:YYZZ:5678::/64, where
       WW.XX.YY.ZZ is the IPv4 address of ppp0 at configuration time. (IPv6 addresses are written
       in  hexadecimal	whereas  IPv4  addresses  are  written	in  decimal,  so the IPv4 address
       WW.XX.YY.ZZ in the 6to4 prefix will be represented in hex.)

FILES
       /usr/sbin/radvd
       /etc/radvd.conf
       /var/run/radvd/radvd.pid
       /var/log/radvd.log

CREDIT
       The description of the different flags and variables is in  large  parts  taken	from  RFC
       2461.

RFCS
       Narten,	T.,  E.  Nordmark,  W. Simpson, "Neighbor Discovery for IP Version 6 (IPv6)", RFC
       2461, December 1998

       Thomson, S., and T. Narten, "IPv6 Stateless Address Autoconfiguration", RFC 2462, December
       1998.

       Deering,  S.,  and  R.  Hinden, Editors, "IP Version 6 Addressing Architecture", RFC 2373,
       July 1998.

       Conta, A., and S. Deering, "Internet Control Message Protocol (ICMPv6)  for  the  Internet
       Protocol Version 6 (IPv6)", RFC 2463, December 1998.

       Crawford,  M.,  "Transmission  of IPv6 Packets over Ethernet Networks", RFC 2464, December
       1998.

       Carpenter B., Moore K., "Connection of IPv6 Domains via IPv4 Clouds", RFC  3056,  February
       2001. (6to4 specification)

SEE ALSO
       radvd(8), radvdump(8)

radvd 0.7.2				   29 Mar 2001				    RADVD.CONF(5)


All times are GMT -4. The time now is 07:22 AM.

Unix & Linux Forums Content Copyrightę1993-2018. All Rights Reserved.
UNIX.COM Login
Username:
Password:  
Show Password