Frr fully supports IPv6 routing. As described so far, Frr supports
RIPng, OSPFv3, and BGP-4+. You can give IPv6 addresses to an interface
and configure static IPv6 routing information. Frr IPv6 also provides
-automatic address configuration via a feature called `address auto configuration`. To do it, the router must send router advertisement
+automatic address configuration via a feature called ``address auto configuration``. To do it, the router must send router advertisement
messages to the all nodes that exist on the network.
Previous versions of Frr could be built without IPv6 support. This is
Router Advertisement
====================
-.. index:: {Interface Command} {no ipv6 nd suppress-ra} {}
+.. index:: no ipv6 nd suppress-ra
-{Interface Command} {no ipv6 nd suppress-ra} {}
- Send router advertisment messages.
+``no ipv6 nd suppress-ra``
+ Send router advertisment messages.
-.. index:: {Interface Command} {ipv6 nd suppress-ra} {}
+.. index:: ipv6 nd suppress-ra
-{Interface Command} {ipv6 nd suppress-ra} {}
- Don't send router advertisment messages.
+``ipv6 nd suppress-ra``
+ Don't send router advertisment messages.
-.. index:: {Interface Command} {ipv6 nd prefix `ipv6prefix` [`valid-lifetime`] [`preferred-lifetime`] [off-link] [no-autoconfig] [router-address]} {}
+.. index:: ipv6 nd prefix ipv6prefix [valid-lifetime] [preferred-lifetime] [off-link] [no-autoconfig] [router-address]
-{Interface Command} {ipv6 nd prefix `ipv6prefix` [`valid-lifetime`] [`preferred-lifetime`] [off-link] [no-autoconfig] [router-address]} {}
- Configuring the IPv6 prefix to include in router advertisements. Several prefix
- specific optional parameters and flags may follow:
+``ipv6 nd prefix ipv6prefix [valid-lifetime] [preferred-lifetime] [off-link] [no-autoconfig] [router-address]``
+ Configuring the IPv6 prefix to include in router advertisements. Several prefix
+ specific optional parameters and flags may follow:
+ - ``valid-lifetime``: the length of time in seconds during what the prefix is
+ valid for the purpose of on-link determination. Value ``infinite`` represents
+ infinity (i.e. a value of all one bits (``0xffffffff``)).
+ Range: ``<0-4294967295>`` Default: ``2592000``
-``
- `valid-lifetime` - the length of time in seconds during what the prefix is
- valid for the purpose of on-link determination. Value `infinite` represents
- infinity (i.e. a value of all one bits (`0xffffffff`)).
+ - ``preferred-lifetime``: the length of time in seconds during what addresses
+ generated from the prefix remain preferred. Value ``infinite`` represents
+ infinity.
+ Range: ``<0-4294967295>`` Default: ``604800``
- Range: `<0-4294967295>` Default: `2592000`
+ - ``off-link``: indicates that advertisement makes no statement about on-link or
+ off-link properties of the prefix.
+ Default: not set, i.e. this prefix can be used for on-link determination.
+ - ``no-autoconfig``: indicates to hosts on the local link that the specified prefix
+ cannot be used for IPv6 autoconfiguration.
-``
- `preferred-lifetime` - the length of time in seconds during what addresses
- generated from the prefix remain preferred. Value `infinite` represents
- infinity.
+ Default: not set, i.e. prefix can be used for autoconfiguration.
- Range: `<0-4294967295>` Default: `604800`
+ - ``router-address``: indicates to hosts on the local link that the specified
+ prefix contains a complete IP address by setting R flag.
+ Default: not set, i.e. hosts do not assume a complete IP address is placed.
-``
- `off-link` - indicates that advertisement makes no statement about on-link or
- off-link properties of the prefix.
+.. index::
+ single: no ipv6 nd ra-interval [<1-1800>]
+ single: no ipv6 nd ra-interval [<1-1800>]
- Default: not set, i.e. this prefix can be used for on-link determination.
+``[no] ipv6 nd ra-interval [<1-1800>]``
+ The maximum time allowed between sending unsolicited multicast router
+ advertisements from the interface, in seconds.
+ Default: ``600``
+.. index:: ipv6 nd ra-interval msec <70-1800000>
-``
- `no-autoconfig` - indicates to hosts on the local link that the specified prefix
- cannot be used for IPv6 autoconfiguration.
- Default: not set, i.e. prefix can be used for autoconfiguration.
+.. index::
+ single: no ipv6 nd ra-interval [msec <70-1800000>]
+ single: ipv6 nd ra-interval msec <70-1800000>
+``[no] ipv6 nd ra-interval [msec <70-1800000>]``
+ The maximum time allowed between sending unsolicited multicast router
+ advertisements from the interface, in milliseconds.
+ Default: ``600000``
-``
- `router-address` - indicates to hosts on the local link that the specified
- prefix
- contains a complete IP address by setting R flag.
+.. index::
+ single: ipv6 nd ra-lifetime <0-9000>
+ single: no ipv6 nd ra-lifetime [<0-9000>]
- Default: not set, i.e. hosts do not assume a complete IP address is placed.
-
-.. index:: {Interface Command} {ipv6 nd ra-interval <1-1800>} {}
-
-{Interface Command} {ipv6 nd ra-interval <1-1800>} {}
-.. index:: {Interface Command} {no ipv6 nd ra-interval [<1-1800>]} {}
-
-{Interface Command} {no ipv6 nd ra-interval [<1-1800>]} {}
- The maximum time allowed between sending unsolicited multicast router
- advertisements from the interface, in seconds.
-
- Default: `600`
-
-.. index:: {Interface Command} {ipv6 nd ra-interval msec <70-1800000>} {}
-
-{Interface Command} {ipv6 nd ra-interval msec <70-1800000>} {}
-.. index:: {Interface Command} {no ipv6 nd ra-interval [msec <70-1800000>]} {}
-
-{Interface Command} {no ipv6 nd ra-interval [msec <70-1800000>]} {}
- The maximum time allowed between sending unsolicited multicast router
- advertisements from the interface, in milliseconds.
-
- Default: `600000`
-
-.. index:: {Interface Command} {ipv6 nd ra-lifetime <0-9000>} {}
-
-{Interface Command} {ipv6 nd ra-lifetime <0-9000>} {}
-.. index:: {Interface Command} {no ipv6 nd ra-lifetime [<0-9000>]} {}
-
-{Interface Command} {no ipv6 nd ra-lifetime [<0-9000>]} {}
+``[no] ipv6 nd ra-lifetime [<0-9000>]``
The value to be placed in the Router Lifetime field of router advertisements
sent from the interface, in seconds. Indicates the usefulness of the router
as a default router on this interface. Setting the value to zero indicates
that the router should not be considered a default router on this interface.
- Must be either zero or between value specified with `ipv6 nd ra-interval`
+ Must be either zero or between value specified with ``ipv6 nd ra-interval``
(or default) and 9000 seconds.
-
- Default: `1800`
-
-.. index:: {Interface Command} {ipv6 nd reachable-time <1-3600000>} {}
-
-{Interface Command} {ipv6 nd reachable-time <1-3600000>} {}
-.. index:: {Interface Command} {no ipv6 nd reachable-time [<1-3600000>]} {}
-
-{Interface Command} {no ipv6 nd reachable-time [<1-3600000>]} {}
- The value to be placed in the Reachable Time field in the Router Advertisement
- messages sent by the router, in milliseconds. The configured time enables the
- router to detect unavailable neighbors. The value zero means unspecified (by
- this router).
-
- Default: `0`
-
-.. index:: {Interface Command} {ipv6 nd managed-config-flag} {}
-
-{Interface Command} {ipv6 nd managed-config-flag} {}
-.. index:: {Interface Command} {no ipv6 nd managed-config-flag} {}
-
-{Interface Command} {no ipv6 nd managed-config-flag} {}
- Set/unset flag in IPv6 router advertisements which indicates to hosts that they
- should use managed (stateful) protocol for addresses autoconfiguration in
- addition to any addresses autoconfigured using stateless address
- autoconfiguration.
-
- Default: not set
-
-.. index:: {Interface Command} {ipv6 nd other-config-flag} {}
-
-{Interface Command} {ipv6 nd other-config-flag} {}
-.. index:: {Interface Command} {no ipv6 nd other-config-flag} {}
-
-{Interface Command} {no ipv6 nd other-config-flag} {}
- Set/unset flag in IPv6 router advertisements which indicates to hosts that
- they should use administered (stateful) protocol to obtain autoconfiguration
- information other than addresses.
-
- Default: not set
-
-.. index:: {Interface Command} {ipv6 nd home-agent-config-flag} {}
-
-{Interface Command} {ipv6 nd home-agent-config-flag} {}
-.. index:: {Interface Command} {no ipv6 nd home-agent-config-flag} {}
-
-{Interface Command} {no ipv6 nd home-agent-config-flag} {}
- Set/unset flag in IPv6 router advertisements which indicates to hosts that
- the router acts as a Home Agent and includes a Home Agent Option.
-
- Default: not set
-
-.. index:: {Interface Command} {ipv6 nd home-agent-preference <0-65535>} {}
-
-{Interface Command} {ipv6 nd home-agent-preference <0-65535>} {}
-.. index:: {Interface Command} {no ipv6 nd home-agent-preference [<0-65535>]} {}
-
-{Interface Command} {no ipv6 nd home-agent-preference [<0-65535>]} {}
- The value to be placed in Home Agent Option, when Home Agent config flag is set,
- which indicates to hosts Home Agent preference. The default value of 0 stands
- for the lowest preference possible.
-
- Default: 0
-
-.. index:: {Interface Command} {ipv6 nd home-agent-lifetime <0-65520>} {}
-
-{Interface Command} {ipv6 nd home-agent-lifetime <0-65520>} {}
-.. index:: {Interface Command} {no ipv6 nd home-agent-lifetime [<0-65520>]} {}
-
-{Interface Command} {no ipv6 nd home-agent-lifetime [<0-65520>]} {}
- The value to be placed in Home Agent Option, when Home Agent config flag is set,
- which indicates to hosts Home Agent Lifetime. The default value of 0 means to
- place the current Router Lifetime value.
-
- Default: 0
-
-.. index:: {Interface Command} {ipv6 nd adv-interval-option} {}
-
-{Interface Command} {ipv6 nd adv-interval-option} {}
-.. index:: {Interface Command} {no ipv6 nd adv-interval-option} {}
-
-{Interface Command} {no ipv6 nd adv-interval-option} {}
- Include an Advertisement Interval option which indicates to hosts the maximum time,
- in milliseconds, between successive unsolicited Router Advertisements.
-
- Default: not set
-
-.. index:: {Interface Command} {ipv6 nd router-preference (high|medium|low)} {}
-
-{Interface Command} {ipv6 nd router-preference (high|medium|low)} {}
-.. index:: {Interface Command} {no ipv6 nd router-preference [(high|medium|low)]} {}
-
-{Interface Command} {no ipv6 nd router-preference [(high|medium|low)]} {}
- Set default router preference in IPv6 router advertisements per RFC4191.
-
- Default: medium
-
-.. index:: {Interface Command} {ipv6 nd mtu <1-65535>} {}
-
-{Interface Command} {ipv6 nd mtu <1-65535>} {}
-.. index:: {Interface Command} {no ipv6 nd mtu [<1-65535>]} {}
-
-{Interface Command} {no ipv6 nd mtu [<1-65535>]} {}
- Include an MTU (type 5) option in each RA packet to assist the attached hosts
- in proper interface configuration. The announced value is not verified to be
- consistent with router interface MTU.
-
- Default: don't advertise any MTU option
-
-::
-
- @group
- interface eth0
- no ipv6 nd suppress-ra
- ipv6 nd prefix 2001:0DB8:5009::/64
- @end group
-
-
- For more information see @cite{RFC2462 (IPv6 Stateless Address Autoconfiguration)}
- , @cite{RFC4861 (Neighbor Discovery for IP Version 6 (IPv6))}
- , @cite{RFC6275 (Mobility Support in IPv6)}
- and @cite{RFC4191 (Default Router Preferences and More-Specific Routes)}.
-
+ Default: ``1800``
+
+.. index::
+ single: no ipv6 nd reachable-time [<1-3600000>]
+ single: ipv6 nd reachable-time <1-3600000>
+
+``[no] ipv6 nd reachable-time [<1-3600000>]``
+ The value to be placed in the Reachable Time field in the Router Advertisement
+ messages sent by the router, in milliseconds. The configured time enables the
+ router to detect unavailable neighbors. The value zero means unspecified (by
+ this router).
+ Default: ``0``
+
+.. index::
+ single: ipv6 nd managed-config-flag
+ single: no ipv6 nd managed-config-flag
+
+``[no] ipv6 nd managed-config-flag``
+ Set/unset flag in IPv6 router advertisements which indicates to hosts that they
+ should use managed (stateful) protocol for addresses autoconfiguration in
+ addition to any addresses autoconfigured using stateless address
+ autoconfiguration.
+ Default: not set
+
+.. index::
+ single: ipv6 nd other-config-flag
+ single: no ipv6 nd other-config-flag
+
+``[no] ipv6 nd other-config-flag``
+ Set/unset flag in IPv6 router advertisements which indicates to hosts that
+ they should use administered (stateful) protocol to obtain autoconfiguration
+ information other than addresses.
+ Default: not set
+
+.. index::
+ single: ipv6 nd home-agent-config-flag
+ single: no ipv6 nd home-agent-config-flag
+
+``[no] ipv6 nd home-agent-config-flag``
+ Set/unset flag in IPv6 router advertisements which indicates to hosts that
+ the router acts as a Home Agent and includes a Home Agent Option.
+ Default: not set
+
+.. index:: ipv6 nd home-agent-preference <0-65535>
+
+.. index::
+ single: no ipv6 nd home-agent-preference [<0-65535>]
+ single: ipv6 nd home-agent-preference <0-65535>
+
+``[no] ipv6 nd home-agent-preference [<0-65535>]``
+ The value to be placed in Home Agent Option, when Home Agent config flag is set,
+ which indicates to hosts Home Agent preference. The default value of 0 stands
+ for the lowest preference possible.
+ Default: ``0``
+
+.. index::
+ single: ipv6 nd home-agent-lifetime <0-65520>
+ single: no ipv6 nd home-agent-lifetime <0-65520>
+
+``[no] ipv6 nd home-agent-lifetime [<0-65520>]``
+ The value to be placed in Home Agent Option, when Home Agent config flag is set,
+ which indicates to hosts Home Agent Lifetime. The default value of 0 means to
+ place the current Router Lifetime value.
+
+ Default: ``0``
+
+.. index::
+ single: ipv6 nd adv-interval-option
+ single: no ipv6 nd adv-interval-option
+
+``[no] ipv6 nd adv-interval-option``
+ Include an Advertisement Interval option which indicates to hosts the maximum time,
+ in milliseconds, between successive unsolicited Router Advertisements.
+ Default: not set
+
+.. index::
+ single: ipv6 nd router-preference (high|medium|low)
+ single: no ipv6 nd router-preference (high|medium|low)
+
+``[no] ipv6 nd router-preference [(high|medium|low)]``
+ Set default router preference in IPv6 router advertisements per RFC4191.
+ Default: medium
+
+.. index::
+ single: ipv6 nd mtu <1-65535>
+ single: no ipv6 nd mtu [<1-65535>]
+
+``[no] ipv6 nd mtu [<1-65535>]``
+ Include an MTU (type 5) option in each RA packet to assist the attached hosts
+ in proper interface configuration. The announced value is not verified to be
+ consistent with router interface MTU.
+
+ Default: don't advertise any MTU option.::
+ interface eth0
+ no ipv6 nd suppress-ra
+ ipv6 nd prefix 2001:0DB8:5009::/64
+
+
+For more information see
+:t:`RFC2462 (IPv6 Stateless Address Autoconfiguration)`,
+:t:`RFC4861 (Neighbor Discovery for IP Version 6 (IPv6))`,
+:t:`RFC6275 (Mobility Support in IPv6)` and
+:t:`RFC4191 (Default Router Preferences and More-Specific Routes)`.
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