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.. _host-information:
Host Information
----------------
This section describes the system's host information and how to configure them,
it covers the following topics:
* Host name
* Domain
* IP address
* Default gateway
* Aliases
Host Name
^^^^^^^^^
A hostname is the label (name) assigned to a network device (a host) on a
network and is used to distinguish one device from another on specific networks
or over the internet.
Set a system host name:
.. code-block:: console
set system host-name <hostname>
.. note:: Only letters, numbers and hyphens are allowed.
Show host name:
.. code-block:: console
show system host-name
Delete host name:
.. code-block:: console
delete system host-name <hostname>
Example: Set system hostname to 'RT01':
.. code-block:: console
set system host-name RT01
commit
show system host-name
host-name RT01
Domain Name
^^^^^^^^^^^
A domain name is the label (name) assigned to a computer network and is thus
unique.
Set the system's domain:
.. code-block:: console
set system domain-name <domain>
.. note:: Only letters, numbers, hyphens and periods are allowed.
Show domain:
.. code-block:: console
show system domain-name
Remove domain name:
.. code-block:: console
set system delete domain-name <domain>
Example: Set system domain to example.com:
.. code-block:: console
set system domain-name example.com
commit
show system domain-name
domain-name example.com
Static host mappings
^^^^^^^^^^^^^^^^^^^^
How to assign IPs to interfaces is described in chapter
:ref:`interfaces-addresses`. This section shows how to statically map a system
IP to its host name for local (meaning on this VyOS instance) DNS resolution:
.. code-block:: console
set system static-host-mapping host-name <hostname> inet <IP address>
Show static mapping:
.. code-block:: console
show system static-host-mapping
Example: Create a static mapping between the system's hostname `RT01` and
IP address `10.20.30.41`:
.. code-block:: console
set system static-host-mapping host-name RT01 inet 10.20.30.41
commit
show system static-host-mapping
host-name RT01 {
inet 10.20.30.41
}
Aliases
*******
One or more system aliases (static mappings) can be defined:
.. code-block:: console
set system static-host-mapping host-name <hostname> alias <alias>
Show aliases:
.. code-block:: console
show system static-mapping
Delete alias:
.. code-block:: console
delete system static-host-mapping host-name <hostname> alias <alias>
Example: Set alias `router1` for system with hostname `RT01`:
.. code-block:: console
set system static-host-mapping host-name RT01 alias router1
commit
show system static-host-mapping
host-name RT01 {
alias router1
inet 10.20.30.41
}
Default Gateway/Route
^^^^^^^^^^^^^^^^^^^^^
In the past (VyOS 1.1.8) used a gateway-address configured in the system tree
(`set system gateway-address <IP address>`) this is no longer supported and
existing configurations are migrated to the new CLI commands.
It is replaced by inserting a static route into the routing table using:
.. code-block:: console
set protocols static route 0.0.0.0/0 next-hop <gateway ip>
Delete the default route from the system
.. code-block:: console
delete protocols static route 0.0.0.0/0
Show default route:
.. code-block:: console
vyos@vyos$ show ip route 0.0.0.0
Routing entry for 0.0.0.0/0
Known via "static", distance 1, metric 0, best
Last update 3d00h23m ago
* 172.16.34.6, via eth1
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