mirror of https://github.com/opnsense/docs
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
97 lines
6.4 KiB
ReStructuredText
97 lines
6.4 KiB
ReStructuredText
==========================
|
|
Router Advertisements
|
|
==========================
|
|
|
|
radvd (the service responsible for this functionality) is the router advertisement daemon for IPv6.
|
|
It listens to router solicitations and sends router advertisements as described in
|
|
"Neighbor Discovery for IP Version 6 (IPv6)" (`RFC 4861 <https://tools.ietf.org/html/rfc4861>`__).
|
|
With these advertisements hosts can automatically configure their addresses and some other parameters.
|
|
It also defines "Neighbor Discovery Optimization for IPv6 over Low-Power Wireless Personal Area Networks (6LoWPANs)"
|
|
(`RFC6775 <https://tools.ietf.org/html/rfc6775>`__). They also can choose a default router based on these advertisements.
|
|
|
|
|
|
--------------------------------
|
|
Router Advertisements (Mode)
|
|
--------------------------------
|
|
|
|
The mode selection contains some predefined settings for radvd, which influence a set of configuration options
|
|
and are intended for specific implementation scenarios.
|
|
They define the type of client deployment used in your network.
|
|
|
|
=====================================================================================================================
|
|
|
|
==================================== ===============================================================================
|
|
Router Only Only advertise this router, clients are using static IPv6 addressses
|
|
Unmanaged Clients will use Stateless Address Autoconfiguration (SLAAC), without
|
|
other (non-address) information being provided.
|
|
Managed Stateful configuration, address configuration provided by DHCPv6
|
|
Assisted Stateful configuration, address configuration provided by DHCPv6, although
|
|
advertised routes can also be used on Stateless Address Autoconfiguration
|
|
setups (SLAAC).
|
|
Stateless Clients will use Stateless Address Autoconfiguration (SLAAC)
|
|
==================================== ===============================================================================
|
|
|
|
A detailed overview of the :code:`radvd` settings determined by the mode can be found below:
|
|
|
|
+-----------------------------+--------------------+-------------+-----------+---------+----------+-----------+
|
|
| scope | Settings | Router Only | Unmanaged | Managed | Assisted | Stateless |
|
|
+-----------------------------+--------------------+-------------+-----------+---------+----------+-----------+
|
|
| | AdvManagedFlag | | | X | X | |
|
|
| Per interface +--------------------+-------------+-----------+---------+----------+-----------+
|
|
| | AdvOtherConfigFlag | | | X | X | X |
|
|
+-----------------------------+--------------------+-------------+-----------+---------+----------+-----------+
|
|
| | AdvOnLink | | X | X | X | X |
|
|
| Per prefix +--------------------+-------------+-----------+---------+----------+-----------+
|
|
| | AdvAutonomous | | X | | X | X |
|
|
+-----------------------------+--------------------+-------------+-----------+---------+----------+-----------+
|
|
|
|
.. Note::
|
|
|
|
Technical details about the options can be found in the `man <https://www.freebsd.org/cgi/man.cgi?query=radvd.conf>`__ page of radvd
|
|
|
|
--------------------------------
|
|
General
|
|
--------------------------------
|
|
|
|
|
|
==================================== ===============================================================================
|
|
Priority The preference associated with the default router,
|
|
as either "low", "medium" (default), or "high".
|
|
RA Interface Interface to use prefix from.
|
|
Advertise Default Gateway uses :code:`AdvDefaultLifetime` to disable advertising as default router when
|
|
unset.
|
|
Advertise Routes Advertise more specific specific routes to the clients.
|
|
==================================== ===============================================================================
|
|
|
|
|
|
--------------------------------
|
|
DNS
|
|
--------------------------------
|
|
|
|
For supported clients, DNS settings can also be propagated by radvd as detailed in `RFC 8106 <https://tools.ietf.org/html/rfc8106>`__
|
|
|
|
==================================== ===============================================================================
|
|
DNS servers Define which dns servers to publish to the clients, either the ones
|
|
defined here or (when **Use the DNS settings of the DHCPv6 server** is set)
|
|
the ones defined in the DHCPv6 server for this interface.
|
|
(:code:`RDNSS` in :code:`radvd`)
|
|
Domain search list Domain search list to push to the clients, when not specified the local
|
|
domain name from this firewall is used. (:code:`DNSSL` in :code:`radvd`)
|
|
==================================== ===============================================================================
|
|
|
|
--------------------------------
|
|
Intervals
|
|
--------------------------------
|
|
|
|
The time between unsolicited multicast router advertisement can be configured, using the following settings,
|
|
usually these are left default.
|
|
|
|
==================================== ===============================================================================
|
|
Minimum Interval The minimum time allowed between sending unsolicited multicast
|
|
router advertisements from the interface, in seconds.
|
|
Must be no less than 3 seconds and no greater than 0.75 * "Maximum Interval".
|
|
Maximum Interval The maximum time allowed between sending unsolicited multicast
|
|
router advertisements from the interface, in seconds.
|
|
Must be no less than 4 seconds and no greater than 1800 seconds.
|
|
==================================== ===============================================================================
|