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:

.RS 4

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.

.RE

The operational status is one of the following:

missing

The device is missing.

Added in version 245.

off

The device is powered down.

Added in version 240.

no-carrier

The device is powered up, but does not yet have a carrier.

Added in version 240.

dormant

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

Added in version 240.

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.

Added in version 242.

carrier

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

Added in version 240.

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.

Added in version 240.

enslaved

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

Added in version 242.

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.

Added in version 240.

The setup status is one of the following:

pending

systemd-udevd(8) is still processing the link, we dont yet know if we will manage it.

Added in version 240.

initialized

systemd-udevd(8) has processed the link, but we dont yet know if we will manage it.

Added in version 251.

configuring

Configuration for the link is being retrieved or the link is being configured.

Added in version 240.

configured

Link has been configured successfully.

Added in version 240.

unmanaged

systemd-networkd is not handling the link.

Added in version 240.

failed

systemd-networkd failed to configure the link.

Added in version 240.

linger

The link is gone, but has not yet been dropped by systemd-networkd.

Added in version 240.

Added in version 219.

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:

.RS 4

●        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

.RE

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).

Added in version 249.

offline

All required links are offline.

Added in version 249.

partial

Some, but not all, required links are online.

Added in version 249.

online

All required links are online.

Added in version 249.

Added in version 219.

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:

.RS 4

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.

.RE

Added in version 219.

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:

.RS 4

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

.RE

Added in version 234.

delete DEVICE...

Deletes virtual netdevs. Takes interface name or index number.

Added in version 243.

up DEVICE...

Bring devices up. Takes interface name or index number.

Added in version 246.

down DEVICE...

Bring devices down. Takes interface name or index number.

Added in version 246.

renew DEVICE...

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

Added in version 244.

forcerenew DEVICE...

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

Added in version 246.

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.

Added in version 244.

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.

Added in version 244.

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(8). 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.

Added in version 254.

cat FILE|@DEVICE...

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

Added in version 254.

The following options are understood:

-a --all

Show all links with status.

Added in version 219.

-s --stats

Show link statistics with status.

Added in version 243.

-l, --full

Do not ellipsize the output.

Added in version 245.

-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.

Added in version 245.

--drop-in=NAME

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

Added in version 254.

--no-reload

When used with edit, systemd-networkd.service(8) or systemd-udevd.service(8) will not be reloaded after the editing finishes.

Added in version 254.

--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.

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

1.

RFC 3484

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