Systemd
basics
https://www.shubhamdipt.com/blog/how-to-create-a-systemd-service-in-linux/
rc.local: https://www.troublenow.org/752/debian-10-add-rc-local/
network
disable predictable network names:
/etc/systemd/networkd/10-eth0.link: [Match] OriginalName=eth0 [Link] NamePolicy=kernel
dsa
/etc/systemd/network/eth0.network:
[Match] Name=eth0 [Network] DHCP=no LinkLocalAddressing=no ConfigureWithoutCarrier=true
/etc/systemd/network/wan.network
[Match] Name=wan [Network] BindCarrier=eth0 Address=192.168.0.18/24 Gateway=192.168.0.10 DNS=192.168.0.10
If setting ConfigureWithoutCarrier on DSA-Port the default-route will not be set,because address is invalid (network down at the time of configuration). Option can Only be set if no default route is needed.
For DNS resolved have to be enabled.
bridge
Create bridge in netdev-file and configuration in network-file
/etc/systemd/network/lanbr.netdev:
[NetDev] Name=lanbr0 Kind=bridge [Bridge] DefaultPVID=1 VLANFiltering=1
/etc/systemd/network/lanbr.network:
[Match] Name=lanbr0 [Network] BindCarrier=eth0 ConfigureWithoutCarrier=true Address=192.168.1.1/24 #Address=192.168.0.18/24 #Gateway=192.168.0.10 #DNS=192.168.0.10
VLAN
https://wiki.archlinux.org/title/VLAN#Single_interface_with_multiple_VLANs_each_with_its_own_gateway
vlans have to be created with a netdev-file first and then linked in the network-file of physical interface
/etc/systemd/network/wan.110.netdev
[NetDev] Name=wan.110 Kind=vlan #MACAddress=10:c3:7b:4f:58:a4 #MTUBytes=1500 [VLAN] Id=110
/etc/systemd/network/wan.network:
[Match] Name=wan [Link] # Override MAC address (spoof MAC address) MACAddress=08:22:33:44:55:66 [Network] BindCarrier=eth0 #DHCP=ipv4 #static setup Address=192.168.0.18/24 Gateway=192.168.0.10 DNS=192.168.0.10 VLAN=wan.110 VLAN=wan.140
static routes
in the .network-file, which is the Gateway
[Route] Gateway=192.168.0.10 Destination=10.0.3.0/24 GatewayOnLink=yes
pppoe
IPv6
Adress assignment
Like IPv4 in network-file with additional Address-value
[Network] Address=192.168.1.1/24 Address=fd00:A::10/64
DHCPv6/RA
In combination with ipv4-DHCP-Server ( DHCPServer=no/ohne DHCPServer-Section ⇒ nur IPv6)
[Match] Name=lanbr0 [Network] BindCarrier=eth0 ConfigureWithoutCarrier=true Address=192.168.1.1/24 Address=fd00:A::10/64 #Address=192.168.0.18/24 #Gateway=192.168.0.10 #DNS=192.168.0.10 DHCPServer=yes IPv6SendRA=yes DHCPv6PrefixDelegation=yes [DHCPServer] PoolOffset=100 PoolSize=150 [IPv6SendRA] Managed=true [IPv6Prefix] Prefix=fd00:A::/64
Tunnel (he)
issues
boot hangs on wait-for-online
https://askubuntu.com/a/1245672/1294721
sudo systemctl edit systemd-networkd-wait-online.service
[Service] ExecStart= ExecStart=/usr/lib/systemd/systemd-networkd-wait-online --any