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306 lines
8.1 KiB
ReStructuredText
306 lines
8.1 KiB
ReStructuredText
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DHCPv6 server
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-------------
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VyOS provides DHCPv6 server functionality which is described in this section.
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In order to use the DHCPv6 server it has to be enabled first:
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.. code-block:: sh
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set service dhcpv6-server
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To restart the DHCPv6 server (operational mode):
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.. code-block:: sh
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restart dhcpv6 server
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To show the current status of the DHCPv6 server use:
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.. code-block:: sh
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show dhcpv6 server status
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Show statuses of all assigned leases:
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.. code-block:: sh
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show dhcpv6 server leases
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DHCPv6 server options
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^^^^^^^^^^^^^^^^^^^^^
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DHCPv6 server preference value
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******************************
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Clients receiving advertise messages from multiple servers choose the server
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with the highest preference value. The range for this value is `0...255`. Set
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a preference value for the DHCPv6 server:
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.. code-block:: sh
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set service dhcpv6-server preference <preference value>
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Delete a preference:
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.. code-block:: sh
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set service dhcpv6-server preference
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Show current preference:
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.. code-block:: sh
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show service dhcpv6-server preference
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Specify address lease time
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**************************
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The default lease time for DHCPv6 leases is 24 hours. This can be changed by
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supplying a `default-time`, `maximum-time` and `minimum-time` (all values in
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seconds):
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.. code-block:: sh
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set service dhcpv6-server shared-network-name <name> subnet <ipv6net> lease-time {default <default-time> | maximum <maximum-time> | minimum <minimum-time>}
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Reset the custom lease times:
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.. code-block:: sh
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delete service dhcpv6-server shared-network-name <name> subnet <ipv6net> lease-time {default | maximum | minimum}
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Show the current configuration:
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.. code-block:: sh
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show service dhcpv6-server shared-network-name <name> subnet <ipv6net> lease-time {default | maximum | minimum}
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Specify NIS domain
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******************
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A Network Information (NIS) domain can be set to be used for DHCPv6 clients:
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.. code-block:: sh
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set service dhcpv6-server shared-network-name <name> subnet <ipv6net> nis-domain <nis-domain-name>
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To Delete the NIS domain:
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.. code-block:: sh
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delete service dhcpv6-server shared-network-name <name> subnet <ipv6net> nis-domain <nis-domain-name>
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Show a configured NIS domain:
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.. code-block:: sh
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show service dhcpv6-server shared-network-name <name> subnet <ipv6net> nis-domain <nis-domain-name>
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Specify NIS+ domain
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*******************
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The procedure to specify a Network Information Service Plus (NIS+) domain is
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similar to the NIS domain one:
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.. code-block:: sh
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set service dhcpv6-server shared-network-name <name> subnet <ipv6net> nisplus-domain <nisplus-domain-name>
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To Delete the NIS+ domain:
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.. code-block:: sh
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delete service dhcpv6-server shared-network-name <name> subnet <ipv6net> nisplus-domain <nisplus-domain-name>
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Show a configured NIS domain:
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# show service dhcpv6-server shared-network-name <name> subnet <ipv6net> nisplus-domain <nisplus-domain-name>
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Specify NIS server address
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**************************
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To specify a NIS server address for DHCPv6 clients:
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.. code-block:: sh
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set service dhcpv6-server shared-network-name <name> subnet <ipv6net> nis-server <IPv6 address>
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Delete a specified NIS server address:
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.. code-block:: sh
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delete service dhcpv6-server shared-network-name <name> subnet <ipv6net> nis-server <IPv6 address>
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Show specified NIS server addresses:
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.. code-block:: sh
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show service dhcpv6-server shared-network-name <name> subnet <ipv6net> nis-server
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Specify NIS+ server address
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***************************
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To specify a NIS+ server address for DHCPv6 clients:
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.. code-block:: sh
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set service dhcpv6-server shared-network-name <name> subnet <ipv6net> nisplus-server <IPv6 address>
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Delete a specified NIS+ server address:
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.. code-block:: sh
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delete service dhcpv6-server shared-network-name <name> subnet <ipv6net> nisplus-server <IPv6 address>
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Show specified NIS+ server addresses:
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.. code-block:: sh
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show service dhcpv6-server shared-network-name <name> subnet <ipv6net> nisplus-server
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Specify a SIP server address for DHCPv6 clients
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***********************************************
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By IPv6 address
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###############
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A Session Initiation Protocol (SIP) server address can be specified
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for DHCPv6 clients:
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.. code-block:: sh
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set service dhcpv6-server shared-network-name <name> subnet <ipv6net> sip-server-address <IPv6 address>
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Delete a specified SIP server address:
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.. code-block:: sh
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delete service dhcpv6-server shared-network-name <name> subnet <ipv6net> sip-server-address <IPv6 address>
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Show specified SIP server addresses:
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.. code-block:: sh
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show service dhcpv6-server shared-network-name <name> subnet <ipv6net> sip-server-address
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By FQDN
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#######
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A name for SIP server can be specified:
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.. code-block:: sh
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set service dhcpv6-server shared-network-name <name> subnet <ipv6net> sip-server-name <sip-server-name>
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Delete a specified SIP server name:
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.. code-block:: sh
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delete service dhcpv6-server shared-network-name <name> subnet <ipv6net> sip-server-name <sip-server-name>
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Show specified SIP server names:
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.. code-block:: sh
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show service dhcpv6-server shared-network-name <name> subnet <ipv6net> sip-server-name
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Simple Network Time Protocol (SNTP) server address for DHCPv6 clients
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*********************************************************************
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A SNTP server address can be specified for DHCPv6 clients:
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.. code-block:: sh
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set service dhcpv6-server shared-network-name <name> subnet <ipv6net> sntp-server-address <IPv6 address>
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Delete a specified SNTP server address:
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.. code-block:: sh
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delete service dhcpv6-server shared-network-name <name> subnet <ipv6net> sntp-server-address <IPv6 address>
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Show specified SNTP server addresses:
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.. code-block:: sh
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show service dhcpv6-server shared-network-name <name> subnet <ipv6net> sntp-server-address
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DHCPv6 address pools
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^^^^^^^^^^^^^^^^^^^^
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DHCPv6 address pools must be configured for the system to act as a DHCPv6
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server. The following example describes a common scenario.
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Example 1: DHCPv6 address pool
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******************************
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A shared network named `NET1` serves subnet `2001:db8:100::/64` which is
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connected to `eth1`, a DNS server at `2001:db8:111::111` is used for name
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services. The range of the address pool shall be `::100` through `::199`. The
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lease time will be left at the default value which is 24 hours.
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.. code-block:: sh
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set service dhcpv6-server shared-network-name NET1 subnet 2001:db8:100::/64 address-range start 2001:db8:100::100 stop 2001:db8:100::199
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set service dhcpv6-server shared-network-name NET1 subnet 2001:db8:100::/64 name-server 2001:db8:111::111
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Commit the changes and show the configuration:
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.. code-block:: sh
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commit
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show service dhcpv6-server
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shared-network-name NET1 {
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subnet 2001:db8:100::/64 {
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address-range {
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start 2001:db8:100::100 {
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stop 2001:db8:100::199
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}
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}
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name-server 2001:db8:111::111
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}
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}
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Static mappings
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^^^^^^^^^^^^^^^
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In order to map specific IPv6 addresses to specific hosts static mappings can
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be created. The following example explains the process.
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Example 1: Static IPv6 MAC-based mapping
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****************************************
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IPv6 address `2001:db8:100::101` shall be statically mapped to a device with
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MAC address `00:15:c5:b7:5e:23`, this host-specific mapping shall be named
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`client1`.
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.. note:: The MAC address identifier is defined by the last 4 byte of the
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MAC address.
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.. code-block:: sh
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set service dhcpv6-server shared-network-name NET1 subnet 2001:db8:100::/64 static-mapping client1 ipv6-address 2001:db8:100::101
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set service dhcpv6-server shared-network-name NET1 subnet 2001:db8:100::/64 static-mapping client1 identifier c5b75e23
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Commit the changes and show the configuration:
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.. code-block:: sh
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show service dhcp-server shared-network-name NET1
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shared-network-name NET1 {
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subnet 2001:db8:100::/64 {
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name-server 2001:db8:111::111
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address-range {
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start 2001:db8:100::100 {
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stop 2001:db8:100::199 {
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}
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}
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static-mapping client1 {
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ipv6-address 2001:db8:100::101
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identifier c5b75e23
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}
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}
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}
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