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ip6rtrd.conf(4)
NAME
ip6rtrd.conf - IPv6 router daemon (ip6rtrd) configuration file
DESCRIPTION
The ip6rtrd.conf file contains configuration information that is read by
the ip6rtrd daemon at initialization time. This file contains statements
that control information sent in router advertisements and RIPng messages.
The ip6rtrd.conf file consists of structured information for each interface
in the following format:
interface interface-name {
# interface keyword-value pairs, one per line
Prefix prefix/length {
# prefix keyword-value pairs, one per line
}
Address address {
# address keyword-value pairs, one per line
}
}
Comments begin with the number sign (#) and continue to the end of the
line.
Basic Interface Keywords
The following basic keywords are defined in RFC 2461 for IPv6 operation:
AdvCurHopLimit
Specifies the value to be placed in the Cur Hop Limit field in the
Router Advertisement messages sent by the router. The value 0 (zero)
means unspecified (by this router). Valid values are any non-negative
integer. The default is 0.
AdvDefaultLifetime
Specifies a time, in seconds, that is placed in the Router Lifetime
field in the Router Advertisement. Valid values are between 0 or
MaxRtrAdvInterval and 9000, inclusive. The default is 1800 seconds.
AdvLinkMTU
Specifies a non-negative integer value to be placed in MTU options sent
by the router. The default is 0.
AdvManagedFlag
Enables (1) or disables (0) the setting of a flag in the "Managed
address configuration" flag field in the Router Advertisement. The
default is 0.
AdvOtherConfigFlag
Enables (1) or disables (0) the setting of a flag in the "Other
stateful configuration" flag field in the Router Advertisement. The
default is 0.
AdvReachableTime
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. The default is 0 milliseconds.
AdvRetransTimer
Specifies a non-negative integer value to be placed in the Retrans
Timer field in the Router Advertisement. The default is 0 (zero).
AdvSendAdvertisements
Enables (yes) or disables (no) the sending of periodic Router
Advertisements and responding to Router Solicitations. The default is
yes.
MaxRtrAdvInterval
Specifies the maximum time, in seconds, between sending unsolicited
multicast Router Advertisements from the interface. Valid values are
between 4 and 1800 seconds, inclusive. The default is 600 seconds.
MinRtrAdvInterval
Specifies the minimum time, in seconds, between sending unsolicited
multicast Router Advertisements from the interface. Valid values are
between 3 and .75 * MaxRtrAdvInterval. The default is 200 seconds.
Additional Interface Keywords
The following additional interface keywords are accepted:
AdvSendLinkLayerAddress
Enables (yes) or disables (no) the sending of the interface link-layer
address option in outgoing router advertisements. The default is yes.
AdvSendSiteLocal
Enables (yes) or disables (no) the sending of site local prefixes in
outgoing router advertisements. The default is no.
PoisonReverse
Enables (1) or disables (0) the Poisoned Reverse algorithm as specified
in RFC 2080. The default is 1.
ripng
Enables (yes) or disables (no) participation in RIPng on the interface.
If enabled, RIPng updates are sent on the interface, and received RIPng
updates are processed as defined in RFC 2080. You cannot specify yes
for automatic tunnels (the tun0 interface). The default is yes (except
for tun0).
SplitHorizon
Enables (1) or disables (0) the Split Horizon algorithm as specified in
RFC 2080. The default is 1.
Mobility Management Keywords
For mobility management, the following interface keywords (defined in
draft-ietf-mobileip-ipv6-13.txt) are accepted:
MaxRtrAdvIntervalMsec
Specifies the maximum time, in milliseconds, allowed between sending
unsolicited multicast Router Advertisements from the interface. The
range of valid values are from 500 milliseconds (.5 seconds) to 1500
milliseconds (1.5 seconds). The default is 0.
MinRtrAdvIntervalMsec
Specifies the minimum time allowed between sending unsolicited
multicast Router Advertisements from the interface, in milliseconds.
The range of valid values is from 500 milliseconds (.5 seconds) to .75
* MaxRtrAdvIntervalMsec. The default is 0.
For example, a typical configuration to support mobility would use the
following values to specify a maximum and minimum Router Advertisement (RA)
interval of .5 to 1.5 seconds:
interface interface-name {
MinRtrAdvInterval 0
MinRtrAdvIntervalMsec 500
MaxRtrAdvInterval 1
MaxRtrAdvIntervalMsec 500
}
Address Prefix Information
Each address prefix to be configured on the interface must be defined
within a prefix block that begins with the keyword Prefix followed by the
prefix and length (separated by a slash (/)) and optionally followed by an
additional address prefix information block of keyword-value pairs.
The following address prefix keywords and values are defined in RFC 2461:
AdvAutonomousFlag
Enables (1) or disables (0) the setting of the Autonomous Flag field in
the Prefix Information option. The default is 1.
AdvOnLinkFlag
Enables (1) or disables (0) the setting of the on-link flag field in
outgoing router advertisements. The default is 1.
AdvPreferredLifetime
Specifies the preferred lifetime of the address prefix, in seconds, to
be placed in outgoing router advertisements. The default is 604800
seconds, or 7 days.
AdvValidLifetime
Specifies the valid lifetime of the address prefix, in seconds, to be
placed in outgoing router advertisements. The default is 2592000
seconds, or 30 days.
The following address prefix keywords and values are defined in RFC 2080:
RouteMetric
Specifies a value that represents the total cost of getting a datagram
from the router to a destination. Valid values are between 1 and 16,
inclusive. The default is 1.
RouteTag
Specifies a integer that is assigned to a route and must be preserved
and readvertised with a route. The default is 0.
In addition, you can specify the following address prefix keywords:
ConfigureThisPrefix
The ip6rtrd daemon will configure the advertised prefix on the
interface if ConfigureThisPrefix is specified and set to yes, or if
ConfigureThisPrefix is not specified and AdvAutonomousFlag is set to 1.
The prefix is not auto-configured in all other cases. Valid values are
yes and no. The default action is the action specified by
AdvAutonomousFlag.
Gateway
Specifies an IPv6 address to use as an off-link route to a gateway. You
can use this mechanism to set up default routes.
SendInAdvertisement
Enables (yes) or disables (no) the sending of the address prefix in
routing advertisements. The default is yes.
Address Information
Each address to be configured on the interface must be defined within a
address block that begins with the keyword Address followed by the IPv6
address and optionally followed by an additional address information block
of keyword-value pairs. The address value is the 128-bit IPv6 address, as
follows:
x:x:x:x:x:x:x:x
In this format, each x is the hexadecimal value of a 16-bit piece of the
address. An IPv6 address typically consists of a 64-bit prefix followed by
a 64-bit interface identifier.
You can specify the following address keywords and values:
Anycast
Configures (yes) or unconfigures (no) the specified address as an
anycast address. The default is no.
ConfigureThisAddress
Configures (yes) or unconfigures (no) the specified address on the
interface. The default is yes.
Gateway
Specifies an IPv6 address to use as an off-link route to a host. You
can use this mechanism to set up host routes.
The following address keywords and values are defined in RFC 2080:
RouteMetric
Specifies a value that represents the total cost of getting a datagram
from the router to a destination. Valid values are between 1 and 16,
inclusive. The default is 1.
RouteTag
Specifies a integer that is assigned to a route and must be preserved
and readvertised with a route. The default is 0.
RELATED INFORMATION
Daemons: ip6rtrd(8).
RFC 2461, Neighbor Discovery for IP version 6 (IPv6), Narten, T., Nordmark,
E., Simpson W. A. December 1998
RFC 2462, IPv6 Stateless Address Autoconfiguration, Thompson, S., Narten,
T. December 1998
RFC 2080, RIPng for IPv6, Malkin, G., Minnear, R. January 1997.
draft-ietf-mobileip-ipv6-15.txt, Mobility Support in IPv6, Johnson, David
B., Perkins, Charles. November 2000
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