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dhcp: add raw parameters description and example

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Jernej Jakob 2019-12-06 18:16:28 +01:00
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docs/services/dhcp.rst
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@ -293,6 +293,34 @@ if you need multiple search domains (DHCP Option 119).
Multi: can be specified multiple times.
Raw parameters
--------------
Raw parameters can be passed to shared-network-name, subnet and static-mapping:
.. code-block:: none
set service dhcp-server shared-network-name dhcpexample shared-network-parameters
<text> Additional shared-network parameters for DHCP server.
set service dhcp-server shared-network-name dhcpexample subnet 192.0.2.0/24 subnet-parameters
<text> Additional subnet parameters for DHCP server.
set service dhcp-server shared-network-name dhcpexample subnet 192.0.2.0/24 static-mapping example static-mapping-parameters
<text> Additional static-mapping parameters for DHCP server.
Will be placed inside the "host" block of the mapping.
These parameters are passed as-is to isc-dhcp's dhcpd.conf under the configuration node they are defined in.
They are not validated so an error in the raw parameters won't be caught by vyos's scripts and will cause dhcpd to fail to start.
Always verify that the parameters are correct before commiting the configuration.
Refer to isc-dhcp's dhcpd.conf manual for more information:
https://kb.isc.org/docs/isc-dhcp-44-manual-pages-dhcpdconf
Example
^^^^^^^
.. opcmd:: set service dhcp-server shared-network-name dhcpexample subnet 192.0.2.0/24 static-mapping example static-mapping-parameters "option domain-name-servers 192.0.2.11, 192.0.2.12;"
Override the static-mapping's dns-server with a custom one that will be sent only to this host.
DHCPv6 Server
=============