LinuxCommandLibrary

networkctl

Query the status of network links.

TLDR

Show a list of existing links and their status

$ networkctl list
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Show an overall network status
$ networkctl status
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Bring network devices up
$ networkctl up [interface1 interface2 ...]
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Bring network devices down
$ networkctl down [interface1 interface2 ...]
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Renew dynamic configurations (e.g. IP addresses received from a DHCP server)
$ networkctl renew [interface1 interface2 ...]
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Reload configuration files (.netdev and .network)
$ networkctl reload
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Reconfigure network interfaces (if you edited the config, you need to call networkctl reload first)
$ networkctl reconfigure [interface1 interface2 ...]
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SYNOPSIS

networkctl [OPTIONS...] COMMAND [LINK...]

DESCRIPTION

networkctl may be used to query or modify the state of the network links as seen by systemd-networkd. Please refer to systemd-networkd.service(8) for an introduction to the basic concepts, functionality, and configuration syntax.

COMMANDS

The following commands are understood:

list [PATTERN...]

Show a list of existing links and their status. If one or more PATTERNs are specified, only links matching one of them are shown. If no further arguments are specified shows all links, otherwise just the specified links. Produces output similar to:

IDX LINK         TYPE     OPERATIONAL SETUP
  1 lo           loopback carrier     unmanaged
  2 eth0         ether    routable    configured
  3 virbr0       ether    no-carrier  unmanaged
  4 virbr0-nic   ether    off         unmanaged

4 links listed.

The operational status is one of the following:

missing

the device is missing

off

the device is powered down

no-carrier

the device is powered up, but it does not yet have a carrier

dormant

the device has a carrier, but is not yet ready for normal traffic

degraded-carrier

one of the bonding or bridge slave network interfaces is in off, no-carrier, or dormant state, and the master interface has no address.

carrier

the link has a carrier, or for bond or bridge master, all bonding or bridge slave network interfaces are enslaved to the master

degraded

the link has carrier and addresses valid on the local link configured. For bond or bridge master this means that not all slave network interfaces have carrier but at least one does.

enslaved

the link has carrier and is enslaved to bond or bridge master network interface

routable

the link has carrier and routable address configured. For bond or bridge master it is not necessary for all slave network interfaces to have carrier, but at least one must.

The setup status is one of the following:

pending

udev is still processing the link, we dont yet know if we will manage it

initialized

udev has processed the link, but we dont yet know if we will manage it

configuring

in the process of retrieving configuration or configuring the link

configured

link configured successfully

unmanaged

networkd is not handling the link

failed

networkd failed to manage the link

linger

the link is gone, but has not yet been dropped by networkd

status [PATTERN...]

Show information about the specified links: type, state, kernel module driver, hardware and IP address, configured DNS servers, etc. If one or more PATTERNs are specified, only links matching one of them are shown.

When no links are specified, an overall network status is shown. Also see the option --all.

Produces output similar to:

‚óŹ        State: routable
  Online state: online
       Address: 10.193.76.5 on eth0
                192.168.122.1 on virbr0
                169.254.190.105 on eth0
                fe80::5054:aa:bbbb:cccc on eth0
       Gateway: 10.193.11.1 (CISCO SYSTEMS, INC.) on eth0
           DNS: 8.8.8.8
                8.8.4.4

In the overall network status, the online state depends on the individual online state of all required links. Managed links are required for online by default. In this case, the online state is one of the following:

unknown

all links have unknown online status (i.e. there are no required links)

offline

all required links are offline

partial

some, but not all, required links are online

online

all required links are online

lldp [PATTERN...]

Show discovered LLDP (Link Layer Discovery Protocol) neighbors. If one or more PATTERNs are specified only neighbors on those interfaces are shown. Otherwise shows discovered neighbors on all interfaces. Note that for this feature to work, LLDP= must be turned on for the specific interface, see systemd.network(5) for details.

Produces output similar to:

LINK             CHASSIS ID        SYSTEM NAME      CAPS        PORT ID           PORT DESCRIPTION
enp0s25          00:e0:4c:00:00:00 GS1900           ..b........ 2                 Port #2

Capability Flags:
o - Other; p - Repeater;  b - Bridge; w - WLAN Access Point; r - Router;
t - Telephone; d - DOCSIS cable device; a - Station; c - Customer VLAN;
s - Service VLAN, m - Two-port MAC Relay (TPMR)

1 neighbors listed.

label

Show numerical address labels that can be used for address selection. This is the same information that ip-addrlabel(8) shows. See RFC 3484[1] for a discussion of address labels.

Produces output similar to:

Prefix/Prefixlen                          Label
        ::/0                                  1
    fc00::/7                                  5
    fec0::/10                                11
    2002::/16                                 2
    3ffe::/16                                12
 2001:10::/28                                 7
    2001::/32                                 6
::ffff:0.0.0.0/96                             4
        ::/96                                 3
       ::1/128                                0

delete DEVICE...

Deletes virtual netdevs. Takes interface name or index number.

up DEVICE...

Bring devices up. Takes interface name or index number.

down DEVICE...

Bring devices down. Takes interface name or index number.

renew DEVICE...

Renew dynamic configurations e.g. addresses received from DHCP server. Takes interface name or index number.

forcerenew DEVICE...

Send a FORCERENEW message to all connected clients, triggering DHCP reconfiguration. Takes interface name or index number.

reconfigure DEVICE...

Reconfigure network interfaces. Takes interface name or index number. Note that this does not reload .netdev or .network corresponding to the specified interface. So, if you edit config files, it is necessary to call networkctl reload first to apply new settings.

reload

Reload .netdev and .network files. If a new .netdev file is found, then the corresponding netdev is created. Note that even if an existing .netdev is modified or removed, systemd-networkd does not update or remove the netdev. If a new, modified or removed .network file is found, then all interfaces which match the file are reconfigured.

edit FILE|@DEVICE...

Edit network configuration files, which include .network, .netdev, and .link files. If no network config file matching the given name is found, a new one will be created under /etc/. Specially, if the name is prefixed by "@", it will be treated as a network interface, and editing will be performed on the network config files associated with it. Additionally, the interface name can be suffixed with ":network" (default) or ":link", in order to choose the type of network config to operate on.

If --drop-in= is specified, edit the drop-in file instead of the main configuration file. Unless --no-reload is specified, systemd-networkd will be reloaded after the edit of the .network or .netdev files finishes. The same applies for .link files and systemd-udevd. Note that the changed link settings are not automatically applied after reloading. To achieve that, trigger uevents for the corresponding interface. Refer to systemd.link(5) for more information.

cat FILE|@DEVICE...

Show network configuration files. This command honors the "@" prefix in the same way as edit.

OPTIONS

The following options are understood:

-a --all

Show all links with status.

-s --stats

Show link statistics with status.

-l, --full

Do not ellipsize the output.

-n, --lines=

When used with status, controls the number of journal lines to show, counting from the most recent ones. Takes a positive integer argument. Defaults to 10.

--drop-in=

NAMEWhen used with edit, edit the drop-in file NAME instead of the main configuration file.

--no-reload

When used with edit, systemd-networkd or systemd-udevd will not be reloaded after the editing finishes.

--json=MODE

Shows output formatted as JSON. Expects one of "short" (for the shortest possible output without any redundant whitespace or line breaks), "pretty" (for a pretty version of the same, with indentation and line breaks) or "off" (to turn off JSON output, the default).

-h, --help

Print a short help text and exit.

--version

Print a short version string and exit.

--no-legend

Do not print the legend, i.e. column headers and the footer with hints.

--no-pager

Do not pipe output into a pager.

EXIT STATUS

On success, 0 is returned, a non-zero failure code otherwise.

NOTES

1.

RFC 3484

https://tools.ietf.org/html/rfc3484

SEE ALSO

systemd-networkd.service(8), systemd.network(5), systemd.netdev(5), ip(8)

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