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How does centos handle empty fields in an IFCFG file?

I'm looking to automate setting up certain network interfaces on a centos server. The easiest way for me to implement this is to create a template config file and render it based on the interface ...
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TMeador
  • 1
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0 answers
9 views

use sytemd-networkd forcerenew on a wifi network to renew that DHCP leases of connected clients

I am trying to use networkctl forcerenew on a wifi network to renew that DHCP leases of connected clients, but it does not seem to work What I am trying is update wlan1.network to have a new subnet ...
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GuySoft
  • 405
1 vote
1 answer
123 views

systemd-networkd not launching DHCPv6 client

The systemd-networkd documentation makes this statement... By enabling DHCPv6 support explicitly, the DHCPv6 client will be started regardless of the presence of routers on the link This is the ...
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Coops
  • 5,937
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0 answers
90 views

What controls the NIC naming convention after fresh Ubuntu 20.04 install?

This is a fresh install Ubuntu server 20.04.04 system. I'm using networkd and netplan to configure networking. I did not do any custom install steps, just loaded the .iso and installed Ubuntu server ...
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Rino Bino
  • 300
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0 answers
54 views

IPv6 forwarding enabled but not working. How to get it to work?

My system is running Debian GNU/Linux 11 (bullseye) My network is configured with two interfaces, one to my ISP and one to my lan. I am using systemd-networkd to manage the interfaces. The problem is ...
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Jeremy Ardley
  • 1
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1 answer
97 views

Networkctl: Manual VLAN IP Link

I've a network interface eth0 that carries my main network as untagged traffic and a "management" network with tagged traffic with the id 18. This is how it's configured: 10-eth0.network: [...
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TCB13
  • 1,046
0 votes
1 answer
145 views

Can't connect container with bridge to the internet using networkd

i have a server running Ubuntu 20.04 LTS connected through one physical ethernet interface to the internet. My prodiver assigned me a static primary IP4 (i will use A.A.A.A here for this IP), so my ...
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Misc08
  • 26
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0 answers
241 views

Force DHCP client to use only IPv4

I have Linux client (running systemd-networkd, version 244), and I want to configure it's network only with IPv4. However, the DHCP server offers both v4 and v6. Is it possible to limit the client to ...
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user951769
  • 1
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0 answers
92 views

Systemd-networkd fails IPv6 autoconfig where ifupdown succeeds

Title is a bit vague, since I do not know what is going on. I want to switch to systemd-networkd, and I want it to autoconfigure both IPv4 and IPv6. I come from ifupdown, with the following config: # ...
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Cheiron
  • 448
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0 answers
99 views

Systemd limit network bandwidth for multiple services

I have a machine with multiple systemd services running which have some network bandwidth requirements. On that same machine I have a FTP server and I need to make sure that if someone is uploading or ...
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Mateus Silva
  • 1
2 votes
0 answers
224 views

OpenSSH server on Ubuntu Impish fails to start after reboot, only manual restart works

Preface and issue I have an Ubuntu 21.10 (Impish) server, which network is managed by netplan and systemd-networkd. My /etc/netplan/01-netcfg.yaml looks like this: network: version: 2 renderer: ...
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burnersk
  • 1,946
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1 answer
246 views

lost network interface to systemd-networkd. What is going on?

I have a systemd host with 4 ethernet ports. one port is reserved for isolated containers. It is set as: # /etc/systemd/network/20-eth3-reserved.network [Match] Name=eth3 [Link] Unmanaged=yes I also ...
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gcb
  • 213
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0 answers
140 views

How to configure new (DHCP configured) interface with non system default route using systemd/networkd?

I am trying to configure Linux system, so during boot/adding new modem (visible as usb0 interface ) any software binding to modem interface (usb0) IP# will use offered by modem GW/routing instead of ...
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matkor
  • 1
1 vote
1 answer
188 views

systemd-networkd configuration not adding any routes and not finishing configuration

With systemd 241 on Debian 10, I am attempting to configure systemd-networkd style networking for an edge server. The problem I have is that when systemd-networkd starts up, it does not add the v4 or ...
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MikeyB
  • 38.6k
2 votes
0 answers
181 views

Route untagged vlan to a tagged vlan with nftables

I have played around a lot with nftables, but I am stuck on this problem for the entire day. I have a wifi ssid that gets tagged vlan20. This part works, and I can see that dnsmasq is assigning ip ...
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techwreck
  • 21
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1 answer
337 views

systemd-networkd: how to elegantly switch between creating a wireless access point and connecting to a wifi network

I'm working on a headless IoT device that creates its own access point so that the user can access its web UI and do necessary configuration. The system uses networkd but I'm not very attached to it ...
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Zbigh1
  • 101
0 votes
2 answers
721 views

How to tag IPv4 and IPv6 packets with different VLAN tags on a Linux box?

I want to tag incoming IPv4 and IPv6 packets from a dual stack enabled connection with different VLAN tags, e.g. IPv4 packets should go to VLAN4 and IPv6 packets should go to VLAN6. To be more general,...
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Ingo
  • 396
1 vote
1 answer
993 views

How to translate "ip route add local 0.0.0.0/0 dev lo table 100" to systemd-networkd?

I am trying to setup a software router with the goal of routing packets to a proxy server on the router. The tutorial I am reading has the following routing rules: ip rule add fwmark 1 table 100 ip ...
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Minsheng Liu
  • 121
1 vote
2 answers
4k views

VLAN support with libvirt for linux bridge to virtual machines

I'm using systemd-networkd to configure network interfaces managed by libvirt for KVM (Kernel-based Virtual Machine) with Debian Bullseye on all nodes. I want to have transparent VLAN support on the ...
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Ingo
  • 396
0 votes
1 answer
400 views

WireGuard via systemd-networkd but with /etc/wireguard/wg0.conf

Is there any solution to use /etc/wireguard/wg0.conf for both, wg-quick and systemd-networkd. Following this example I have to duplicate configuration, but I want to store config in one place. How to ...
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kAldown
  • 161
1 vote
1 answer
823 views

systemd-nspawn container DNS not working

I'm trying to launch a container with systemd-nspawn (from the systemd-container package, version 241), but the container is not able to resolve host names. The host environment is PureOS 9.0, which ...
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Rich Remer
  • 115
1 vote
1 answer
1k views

Netplan - Configure two interfaces on same network

I have a set of Ubuntu 18.04.5 LTS servers with two interfaces each. eno1 - 1g management interface eno5 - 10g data interface Both interfaces are in the same L2 subnet (10.98.16.0/22). My issue is ...
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Apatt
  • 11
0 votes
1 answer
638 views

How to drop dhcp ip assignated when using clevis/tang on Ubuntu 20.04

I unlock my drive with clevis/tang on an Ubuntu server (NBDE). It works fine, but even if my server is configured to use a static ip in /etc/netplan/01-netcfg.yaml, my network interface also listen on ...
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Francis
  • 381
2 votes
1 answer
1k views

How to create dummy interface in /etc/systemd/network?

I am trying to create an equivalent to the following for systemd. auto strongswan0 iface strongswan0 inet static address 10.0.2.1/24 pre-up ip link add strongswan0 type dummy
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sunknudsen
  • 561
4 votes
1 answer
2k views

How to configure interface aliases using Systemd-Networkd?

I am trying to port the following alias from /etc/network/interfaces to /etc/systemd/network/eth0.network. auto eth0:1 iface eth0:1 inet static address 10.0.2.1/24
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sunknudsen
  • 561
0 votes
0 answers
743 views

Add DNS options to systemd-resolved /etc/resolv.conf

I am using systemd-networkd and systemd-resolved. I have /etc/resolv.conf being a symlink to /run/systemd/resolve/stub-resolv.conf as recommended. I guess that /run/systemd/resolve/stub-resolv.conf ...
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Vicente Olivert Riera
  • 51
0 votes
1 answer
948 views

Add IP addresses to systemd-network besides netplan

On an Ubuntu 20.04 server, netplan is used to configure the network. It can configure ordinary static IP addresses but I need additional IPv6 addresses with preferred_lft=0. Netplan can't do that (...
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ygoe
  • 123
1 vote
1 answer
1k views

Configuring DHCP lease when using systemd-networkd on Ubuntu 18.04 Server

we have an Ubuntu 18.04 dedicated server hosted by IONOS (1&1) and want to use one IPv4 and 2 IPv6 addresses. Recently we decided to switch from networking.service to systemd-networkd.service to ...
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Artur
  • 11
2 votes
1 answer
357 views

Stop Google Compute instance from configuring second network interface

I'm spinning up a VM in Google Compute Engine running Debian Buster, and configuring it with two network interfaces. The first uses an ephemeral IP config, and is assigned to a publicly routable ...
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hunmonk
  • 73
2 votes
2 answers
1k views

Failure to configure Wireguard device via systemd-networkd on Google Compute Engine VM

Debian Buster image on a Google Compute Engine VM, and I have this systemd-networkd config placed at /etc/systemd/network/wg0.netdev to configure a Wireguard device: [NetDev] Name=wg0 Kind=wireguard ...
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hunmonk
  • 73
1 vote
0 answers
362 views

systemd-networkd: Set DNS via CLI for managed link

I want to set the DNS for an interface managed by systemd-networkd via cli. The file system is mounted read-only, so is there way to achieve this without manipulating any files? I tried e.g.: ...
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Malte
  • 11
1 vote
2 answers
850 views

create alias for network link using systemd-networkd configuration

I want to add aliases to my network links to use them as short descriptions. I am configuring my interfaces using systemd-networkd, having systemd version 241 on a debian buster server. I've created ...
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betanummeric
  • 43
1 vote
0 answers
266 views

KVM: centos get no bridged ip on fedora

I've installed on my fedora machine centos as vm over kvm. My vm does not get an ip-address from my dhcp server over the bridge interface. When I want to active the interface via nmtui on my centos ...
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Volker Raschek
  • 307
0 votes
1 answer
1k views

systemd: Why "ens3: Could not set route: Network is unreachable" when default route is valid?

Recently my VPS hosted at OVH abrutly lost connectivity. Upon further inspection, systemd-networkd was failing to set default route: ens3: Could not set route: Network is unreachable. It isn't clear ...
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bugzbunny
  • 21
1 vote
1 answer
418 views

Make temporary changes to systemd-networkd which go away after reboot, for testing?

systemd-networkd is the way to configure a network using systemd. The files live in /etc/systemd/network. If I want to change a setting, I can edit a file there, and then do a systemctl restart ...
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Amandasaurus
  • 30k
2 votes
1 answer
511 views

How to set custom settings in resolv.conf when using system-resolvd

I would like to use option values in /etc/resolv.conf. From reviewing the relevant man page (https://linux.die.net/man/5/resolv.conf) I noticed that I can configure various options. For example one ...
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kfir
  • 111
3 votes
1 answer
1k views

Why is networkd changing the MAC addresses of my bonded interfaces?

When I add the config files below into /etc/systemd/network and restart systemd-networkd, I find that the MAC addresses of bond0, eth0 and eth2 have all been changed to a single, locally administered ...
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Isvara
  • 205
0 votes
1 answer
936 views

Change multiple interface IP’s with networkd on coreos

I have a working CoreOS machine where I need to change two virtual network interface IP’s in the /etc/systemd/network file like this: [Match] Name=interface name [Network] Address=ip address. This ...
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spacewalk92
  • 3
2 votes
1 answer
1k views

Systemd's Networkd: Unable to add ipv6 default route

I am having a hell of a time getting IPv6 address connectivity set up on my new VPS. I thought I knew what I was doing but apparently networkd disagrees, I keep getting issues when trying to add a ...
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Foxie The Yiffer
  • 21
3 votes
1 answer
2k views

Renaming networking interface through systemd-networkd not working in upgraded Ubuntu 18.04

In an Ubuntu 18.04 server, I was not able to rename network interfaces through proven config-management-applied systemd-networkd configuration working on all other servers. The only difference I see ...
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Jens Erat
  • 1,360
2 votes
1 answer
3k views

systemd networkd is restarted after systemctl stop

I have some python code that needs to change the configuration of a linux bond using systemd-networkd. I tried editing the .network and .netdev config files and restarting networkd but it doesn't ...
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barisdad
  • 131
1 vote
0 answers
104 views

Systemd host-only bridge

I'm trying to create a bridge device for host to virtual machine only communication with systemd networking. Currently I have a netdev and a network file. The bridge is created after a restart of ...
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Fionn
  • 455
0 votes
0 answers
337 views

What does interface state "configuring" mean?

My systemd-networkd-wait-online.service fails. When I take a look: % networkctl IDX LINK TYPE OPERATIONAL SETUP 1 lo loopback carrier ...
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Johannes Ernst
  • 997
4 votes
2 answers
2k views

Is there a way to automatically add network interfaces to systemd-networkd and/or netplan?

I'm currently building pre-configured disk images for Ubuntu 18.04 servers. While the hardware is mostly the same, there are a few different network interfaces between the devices (and some are ...
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RCH
  • 43
1 vote
0 answers
365 views

netplan apply breaks bonding

Whenever I change my Network configuration on my Ubuntu 18.04 Server and apply it using netplan apply command, the bonding interface is no longer usable. While the IPs are correct, there is simply no ...
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Flole
  • 31
1 vote
0 answers
1k views

Issue with bond + vlan + bridge on top of systemd-network

We are using two switches (let's call them A and B), and each host (running debian 9) has 2 nics (eno1 and eno2), connected to A and B. Those interfaces are bonded together (bond0) in active-backup ...
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aif
  • 371
0 votes
1 answer
1k views

Too many symlinks error setting up a network bridge with systemd on debian9

After a reboot the host is unreachable and I see this error in the logs vmbr0: Could not join netdev: Too many levels of symbolic links I really don't know what's causing it and I don't find anything ...
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Matthieu
  • 185

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