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ndpd.conf(5)                     File Formats                     ndpd.conf(5)

       ndpd.conf - configuration file for IPv6 router autoconfiguration


       The  ndpd.conf  file contains configuration information for in.ndpd(8).
       On a host, this file does not need to exist or can be empty.  The  file
       has  one  configuration entry per line; note that lines can be extended
       with a backslash (\) followed by a NEWLINE. There  are  four  forms  of
       configuration  entries  which  are identified by the first field on the
       line: ifdefault, prefixdefault, if, or prefix.  The  ifdefault  and  if
       entries  set  interface configuration variables. The former establishes
       the routing behavior for all interfaces, the latter sets  per-interface
       parameters.  Any  ifdefault  entries must precede any if entries in the

       The prefixdefault and prefix entries control prefix configuration vari‐
       ables.  prefixdefault  establishes  the default behavior for all prefix
       advertisements on all interfaces. The prefix  keyword  advertises  per-
       prefix  information.  Any prefixdefault entries must precede any prefix
       entries in the file.

       Each ifdefault entry is composed of a single line of the form:

         ifdefault [ if-variable-name value ]*

       Each if entry is composed of a single line of the form:

         if interface [ if-variable-name value ]*

       Each prefixdefault entry is composed of a single line of the form:

         prefixdefault [ prefix-variable-name value ]*

       Each prefix entry is composed of a single line of the form:

         prefix prefix/prefix_length interface [ prefix-variable-name value ]*

       Fields are separated by either SPACE or TAB characters. A  `#'  (number
       sign) indicates the beginning of a comment. Characters up to the end of
       the line are not interpreted by routines that search this file.

       interface               The name of a network interface,  for  example,

       prefix                  An  IPv6  address in standard hexadecimal nota‐
                               tion, for example, fec0:0:0:1::0.

       prefix_length           A number between 0 and 128.

       if-variable-name        An interface variable. Below  is  the  list  of
                               interface  variables applicable to routers only
                               along with their default values  and  units  as
                               discussed  in  RFC  2461 and RFC 2462. The Tmp*
                               variables apply to hosts and routers. The  Tmp*
                               variables configure temporary address function‐
                               ality as defined in RFC 3041.  For  information
                               about the available if-variable-name variables,
                               see if-variable-name Variables section below.

       prefix-variable-name    A prefix variable as discussed in RFC 2461  and
                               RFC  2462.  For information about the available
                               prefix-variable-name  variables,  see   prefix-
                               variable-name Variables section below.

       value                   The  value  is  a function of the unit. Boolean
                               values are true, false, on, off, 1, or 0.

                               Values in seconds can have characters  appended
                               for  day  (d),  hour  h), minute (m) and second
                               (s). The default is seconds.  For  example,  1h
                               means  1  hour. This is equivalent to the value

                               Values  in  milliseconds  can  have  characters
                               appended  for day (d),hour (h), minute (m) sec‐
                               ond (s), and millisecond (ms). The  default  is
                               milliseconds.  For example, 1h is equivalent to
                               the value 3600000.

                               Date/time values are strings that use the  rec‐
                               ommended ISO date format described as "%Y-%m-%d
                               %R", which represents a 4 digit  year,  a  dash
                               character,  a  numeric month, a dash character,
                               and a numeric day of the month, followed by one
                               or  more whitespace characters and finally a 24
                               hour clock with hours, a  colon,  and  minutes.
                               For example, 1999-01-31 20:00 means 8pm January
                               31 in 1999. Since the date/time values  contain
                               a space, use single or double quotes to declare
                               the value. For example:

                                 prefixdefault AdvPreferredExpiration '1999-01-31 20:00'

   if-variable-name Variables
       The if-variable-name variables are described as follows:

         Variable Name           Default    Unit

         AdvSendAdvertisements   false      Boolean
         DupAddrDetectTransmits  1          Counter
         MaxRtrAdvInterval       600        Seconds
         MinRtrAdvInterval       200        Seconds
         AdvManagedFlag          false      Boolean
         AdvOtherConfigFlag      false      Boolean
         AdvLinkMTU              0          Bytes
         AdvReachableTime        0          Milliseconds
         AdvRetransTimer         0          Milliseconds
         AdvCurHopLimit          see below  Counter
         AdvDefaultLifetime      1800       Seconds

       AdvSendAdvertisements     Indicates whether the node  should  send  out
                                 advertisements  and respond to router solici‐
                                 tations. You  need  to  explicitly  configure
                                 this  value  to  turn on router advertisement

       DupAddrDetectTransmits    Defines the number  of  consecutive  Neighbor
                                 Solicitation  messages that the Neighbor Dis‐
                                 covery protocol should send during  Duplicate
                                 Address   Detection   of   the  local  node's

       MaxRtrAdvInterval         Specifies the maximum time  to  wait  between
                                 sending unsolicited multicast advertisements.

       MinRtrAdvInterval         Specifies  the minimum amount of time to wait
                                 between sending unsolicited multicast  adver‐

       AdvManagedFlag            Indicates the value to be placed in the "Man‐
                                 age address configuration" flag in the Router
                                 Advertisement.  This flag causes hosts to run
                                 DHCPv6 to acquire addresses and other config‐
                                 uration  information.  This flag causes hosts
                                 to run DHCPv6 to acquire configuration infor‐
                                 mation,  but  only  if  AdvManagedFlag is not

       AdvOtherConfigFlag        Indicates the  value  to  be  placed  in  the
                                 "Other  stateful  configuration"flag  in  the
                                 Router Advertisement.

       AdvLinkMTU                Specifies an MTU value  to  be  sent  by  the
                                 router.  The  default  of zero indicates that
                                 the router does not specify MTU options.

       AdvReachableTime          Specifies the value  in  the  Reachable  Time
                                 field  in  the advertisement messages sent by
                                 the router.

       AdvRetransTimer           Specifies the  value  in  the  Retrans  Timer
                                 field  in  the advertisement messages sent by
                                 the router.

       AdvCurHopLimit            Specifies the value to be placed in the  cur‐
                                 rent  hop  limit  field  in the advertisement
                                 messages sent by the router. The  default  is
                                 the current diameter of the Internet.

       AdvDefaultLifetime        Specifies  the default lifetime of the router

       Listed below is the interface variable that applies to both  hosts  and

       tab(); lw(2.21i) lw(1.65i) lw(1.63i) lw(2.21i) lw(1.65i) lw(1.63i)

       Variable  NameDefaultUnit StatefulAddrConftrueBoolean StatelessAddrCon‐
       ftrueBoolean RecvAdvertisementstrueBoolean MinRecvHopLimit30Hops TmpAd‐
       drsEnabledfalseBoolean  TmpValidLifetime604800  (1 week)Seconds TmpPre‐
       ferredLifetime86400   (1   day)Seconds   TmpRegenAdvance5Seconds   Tmp‐

       StatefulAddrConf        Controls whether the system configures its IPv6
                               addresses by  means  of  the  Stateful  Address
                               Autoconfiguration   mechanism,  also  known  as
                               DHCPv6, as described in RFC  3315.  If  enabled
                               (the  default),  hosts automatically run DHCPv6
                               based on the "managed" and "other"  flags  sent
                               by  routers.  If  disabled,  in.ndpd  will  not
                               invoke DHCPv6 automatically. DHCPv6  can  still
                               be  invoked  manually  by using ifconfig(8), in
                               which case in.ndpd automatically sets the  pre‐
                               fix length as needed.

       StatelessAddrConf       Controls whether the system configures its IPv6
                               addresses by means  of  the  Stateless  Address
                               Autoconfiguration  mechanism  described  in RFC
                               2462. If enabled hosts (the  default)  autocon‐
                               figure  addresses  based on prefixes advertised
                               by routers,  routers  will  only  autoconfigure
                               addresses  based on the prefixes they advertise
                               themselves. In other words, even when  enabled,
                               routers do not autoconfigure addresses based on
                               prefixes that other routers advertise.  If  you
                               specify  false  for  this  variable,  then  the
                               address must be configured manually.

       RecvAdvertisements      Controls  whether  the   system   obtains   and
                               receives  router  advertisements  on particular
                               interfaces. If disabled,  router  solicitations
                               will  not be sent and all router advertisements
                               will be  ignored.  Otherwise,  the  system  can
                               still  set  default  routes,  MTUs,  and  other
                               parameters from Router Advertisements  even  if
                               StatelessAddrConf is off.

       MinRecvHopLimit         Minimum  value  to  accept in a received router
                               advertisement's  CurHopLimit   field.   in.ndpd
                               ignores  a  received  CurHopLimit value that is
                               less than this.

       TmpAddrsEnabled         Indicates whether a temporary address should be
                               created  for all interfaces or for a particular
                               interface of a node.

       TmpValidLifetime        Sets  the  valid  lifetime  for   a   temporary

       TmpPreferredLifetime    Sets  the  preferred  lifetime  of  a temporary

       TmpRegenAdvance         Specifies the lead time in advance  of  address
                               deprecation  for  generation of a new temporary

       TmpMaxDesyncFactor      Sets the upper bound on the DesyncFactor, which
                               is  a  random value that is used to shorten the
                               preferred  lifetime  so  that  clients  do  not
                               regenerate an address at the same time.

   prefix-variable-name Variables
       The  following  lists the each interface variable and its default value
       and unit:

       tab()  box;  cw(2.74i)   |cw(1.4i)   |cw(1.36i)   lw(2.74i)   |lw(1.4i)

       Variable  NameDefaultUnit _ AdvValidLifetime2592000Seconds _ AdvOnLink‐
       FlagtrueBoolean _  AdvPreferredLifetime604800Seconds  _  AdvAutonomous‐
       FlagtrueBoolean  _ AdvValidExpirationnot setDate/Time _ AdvPreferredEx‐
       piration not setDate/Time

       These variables are described as follows:

       AdvValidLifetime          Specifies the valid lifetime  of  the  prefix
                                 that is being configured.

       AdvOnLinkFlag             Specifies  the  value to be placed in the on-
                                 link  flag  ("L-bit")  field  in  the  Prefix
                                 Information option.

       AdvPreferredLifetime      Specifies  the value to be placed in the Pre‐
                                 ferred Lifetime  in  the  Prefix  Information

       AdvAutonomousFlag         Specifies  the  value to be placed in the Au‐
                                 tonomous Flag field in the Prefix Information

       AdvValidExpiration        Specifies  the  valid  expiration date of the

       AdvPreferredExpiration    Specifies the preferred  expiration  date  of
                                 the prefix.

       The AdvValidExpiration and AdvPreferredExpiration variables are used to
       specify that the lifetime should be decremented in real time as  speci‐
       fied in RFC 2461. If an Expiration variable is set, it takes precedence
       over the corresponding AdvValidLifetime or  AdvPreferredLifetime  vari‐
       able setting.

       Example 1 Sending Router Advertisements for all Interfaces

       The  following example can be used to send router advertisements out to
       all interfaces:

         # Send router advertisements out all interfaces
         ifdefault AdvSendAdvertisements on
         prefixdefault AdvOnLinkFlag on AdvAutonomousFlag on

         # Advertise a (bogus) global prefix and a site
         # local prefix on three interfaces using the default lifetimes
         prefix 2:0:0:9255::0/64      eri0
         prefix fec0:0:0:9255::0/64   eri0

         prefix 2:0:0:9256::0/64      eri1
         prefix fec0:0:0:9256::0/64   eri1

         prefix 2:0:0:9259::0/64      eri2
         prefix fec0:0:0:9259::0/64   eri2

       See attributes(7) for descriptions of the following attributes:

       tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i)

       ATTRIBUTE TYPEATTRIBUTE VALUE  _  Availabilitysystem/network/routing  _
       Interface StabilityCommitted

       Note that the MinRecvHopLimit interface variable is uncommitted.

       icmp6(4P),    ip6(4P),    attributes(7),   dhcpagent(8),   ifconfig(8),
       in.ndpd(8), routeadm(8)

       Narten, T., Nordmark, E., and Simpson, W. RFC 2461, Neighbor  Discovery
       for IP Version 6 (IPv6). The Internet Society. December 1998.

       Thomson,  S.,  and Narten, T. RFC 2462, IPv6 Stateless Address Autocon‐
       figuration. The Internet Society. December 1998.

       Narten, T., and Draves, R. RFC 3041, Privacy Extensions  for  Stateless
       Address Autoconfiguration in IPv6. The Internet Society. January 2001.

       Droms,  R.  RFC  3315,  Dynamic  Host  Configuration  Protocol for IPv6
       (DHCPv6). Cisco Systems. July 2003.

Oracle Solaris 11.4               30 Sep 2015                     ndpd.conf(5)
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