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authorChristian Poessinger <christian@poessinger.com>2020-01-04 16:33:09 +0100
committerChristian Poessinger <christian@poessinger.com>2020-01-04 16:33:09 +0100
commit50352bbf62dd52cdb309eeda409c13533a611431 (patch)
tree878d137b5775aa9837e2f804415a45af33d3127a /docs/services/dhcp.rst
parent811129e2e37dbc9632f1341bfafe7e78b2f68088 (diff)
downloadvyos-documentation-50352bbf62dd52cdb309eeda409c13533a611431.tar.gz
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dhcp: use documented section style guide
Diffstat (limited to 'docs/services/dhcp.rst')
-rw-r--r--docs/services/dhcp.rst174
1 files changed, 88 insertions, 86 deletions
diff --git a/docs/services/dhcp.rst b/docs/services/dhcp.rst
index 2b139b10..23dbabf9 100644
--- a/docs/services/dhcp.rst
+++ b/docs/services/dhcp.rst
@@ -65,8 +65,21 @@ Configuration
This option can be specified multiple times.
+.. cfgcmd:: set service dhcp-server shared-network-name <name> subnet 192.0.2.0/24 domain-name <domain-name>
+
+ The domain-name parameter should be the domain name that will be appended to
+ the client's hostname to form a fully-qualified domain-name (FQDN) (DHCP
+ Option 015).
+
+.. cfgcmd:: set service dhcp-server shared-network-name <name> subnet 192.0.2.0/24 domain-search <domain-name>
+
+ The domain-name parameter should be the domain name used when completing DNS
+ request where no full FQDN is passed. This option can be given multiple times
+ if you need multiple search domains (DHCP Option 119).
+
+
Failover
---------
+^^^^^^^^
VyOS provides support for DHCP failover. DHCP failover must be configured
explicitly by the following statements.
@@ -102,47 +115,9 @@ explicitly by the following statements.
that the failover partnership is immune to disruption (accidental or
otherwise) via third parties.
-Example
-^^^^^^^
-
-* Setup DHCP failover for network 192.0.2.0/24
-* Default gateway and DNS server is at `192.0.2.254`
-* The primary DHCP server uses address `192.168.189.252`
-* The secondary DHCP server uses address `192.168.189.253`
-* DHCP range spans from `192.168.189.10` - `192.168.189.250`
-
-Primary
-"""""""
-
-.. code-block:: none
-
- set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 default-router '192.0.2.254'
- set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 dns-server '192.0.2.254'
- set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 domain-name 'vyos.net'
- set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 failover local-address '192.168.189.252'
- set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 failover name 'NET-VYOS'
- set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 failover peer-address '192.168.189.253'
- set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 failover status 'primary'
- set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 range 0 start '192.168.189.10'
- set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 range 0 stop '192.168.189.250'
-
-Secondary
-"""""""""
-
-.. code-block:: none
-
- set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 default-router '192.0.2.254'
- set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 dns-server '192.0.2.254'
- set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 domain-name 'vyos.net'
- set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 failover local-address '192.168.189.253'
- set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 failover name 'NET-VYOS'
- set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 failover peer-address '192.168.189.252'
- set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 failover status 'primary'
- set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 range 0 start '192.168.189.10'
- set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 range 0 stop '192.168.189.250'
Static mappings
----------------
+^^^^^^^^^^^^^^^
You can specify a static DHCP assignment on a per host basis. You will need the
MAC address of the station and your desired IP address. The address must be
@@ -165,30 +140,9 @@ inside the subnet definition but can be outside of the range statement.
.. hint:: This is the equivalent of the host block in dhcpd.conf of isc-dhcpd.
-DHCP Options
-------------
-
-.. cfgcmd:: set service dhcp-server shared-network-name <name> subnet 192.0.2.0/24 default-router <address>
-
- Specify the default routers IPv4 address which should be used in this subnet.
- This can - of course - be a VRRP address (DHCP option 003).
-
-.. cfgcmd:: set service dhcp-server shared-network-name <name> subnet 192.0.2.0/24 dns-server <address>
-
- Specify the DNS nameservers used (Option 006). This option may be used
- mulltiple times to specify additional DNS nameservers.
-
-.. cfgcmd:: set service dhcp-server shared-network-name <name> subnet 192.0.2.0/24 domain-name <domain-name>
-
- The domain-name parameter should be the domain name that will be appended to
- the client's hostname to form a fully-qualified domain-name (FQDN) (DHCP
- Option 015).
-
-.. cfgcmd:: set service dhcp-server shared-network-name <name> subnet 192.0.2.0/24 domain-search <domain-name>
- The domain-name parameter should be the domain name used when completing DNS
- request where no full FQDN is passed. This option can be given multiple times
- if you need multiple search domains (DHCP Option 119).
+Options
+^^^^^^^
.. list-table::
:header-rows: 1
@@ -318,48 +272,39 @@ DHCP Options
Multi: can be specified multiple times.
-Raw parameters
---------------
+
+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
+ set service dhcp-server shared-network-name <name> 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
+ set service dhcp-server shared-network-name <name> subnet <subnet> 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
+ set service dhcp-server shared-network-name <name> subnet <subnet> static-mapping <description> 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:
+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
Quotes can be used inside parameter values by replacing all quote characters
with the string ``&quot;``. They will be replaced with literal quote characters
when generating dhcpd.conf.
+
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.
-
-.. opcmd:: set service dhcp-server shared-network-name dhcpexample subnet 192.0.2.0/24 static-mapping example static-mapping-parameters "option pxelinux.configfile &quot;pxelinux.cfg/01-00-15-17-44-2d-aa&quot;;"
-
- An option that takes a quoted string is set by replacing all quote characters
- with the string ``&quot;`` inside the static-mapping-parameters value.
- The resulting line in dhcpd.conf will be
- ``option pxelinux.configfile "pxelinux.cfg/01-00-15-17-44-2d-aa";``.
-
-Example
--------
+Quick-Start
+"""""""""""
* We are offering address space in the `192.0.2.0/24` network.
* We are using the network name `mypool`.
@@ -389,6 +334,63 @@ The generated config will look like:
}
}
+
+Failover
+""""""""
+
+* Setup DHCP failover for network 192.0.2.0/24
+* Default gateway and DNS server is at `192.0.2.254`
+* The primary DHCP server uses address `192.168.189.252`
+* The secondary DHCP server uses address `192.168.189.253`
+* DHCP range spans from `192.168.189.10` - `192.168.189.250`
+
+**Primary**
+
+.. code-block:: none
+
+ set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 default-router '192.0.2.254'
+ set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 dns-server '192.0.2.254'
+ set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 domain-name 'vyos.net'
+ set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 failover local-address '192.168.189.252'
+ set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 failover name 'NET-VYOS'
+ set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 failover peer-address '192.168.189.253'
+ set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 failover status 'primary'
+ set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 range 0 start '192.168.189.10'
+ set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 range 0 stop '192.168.189.250'
+
+**Secondary**
+
+.. code-block:: none
+
+ set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 default-router '192.0.2.254'
+ set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 dns-server '192.0.2.254'
+ set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 domain-name 'vyos.net'
+ set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 failover local-address '192.168.189.253'
+ set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 failover name 'NET-VYOS'
+ set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 failover peer-address '192.168.189.252'
+ set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 failover status 'primary'
+ set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 range 0 start '192.168.189.10'
+ set service dhcp-server shared-network-name NET-VYOS subnet 192.0.2.0/24 range 0 stop '192.168.189.250'
+
+
+Raw Parameters
+""""""""""""""
+
+* Override static-mapping's dns-server with a custom one that will be sent only
+ to this host.
+* An option that takes a quoted string is set by replacing all quote characters
+ with the string ``&quot;`` inside the static-mapping-parameters value.
+ The resulting line in dhcpd.conf will be
+ ``option pxelinux.configfile "pxelinux.cfg/01-00-15-17-44-2d-aa";``.
+
+
+.. code-block:: none
+
+ 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;"
+ set service dhcp-server shared-network-name dhcpexample subnet 192.0.2.0/24 static-mapping example static-mapping-parameters "option pxelinux.configfile &quot;pxelinux.cfg/01-00-15-17-44-2d-aa&quot;;"
+
+
+
Operation Mode
--------------