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--- net-config [February 10, 2026 at 18:43] – created yanevskiv
+++ net-config [May 14, 2026 at 11:38] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
+# Network Configuration
+This article is about network configuration in [[gnu-linux|GNU/Linux]] systems
+## ifupdown
+### Dynamic configurations
+Dynamic configuration with ifupdown (IPv4)
+```
+# /etc/network/interfaces
+iface ens3 inet dhcp
+```
+Dynamic configuration with ifupdwon (IPv6)
+```
+iface ens3 inet6 auto
+```
+### Static configurations
+Static configuration with ifupdown (IPv4)
+```
+# /etc/network/interfaces
+iface ens3 inet static
+    address 10.0.1.115
+    netmask 255.255.0.0
+    gateway 10.0.0.1
+    dns-nameservers 1.1.1.1 8.8.8.8
+    dns-search example.com
+```
+Static configuration with ifupdown (IPv6)
+```
+iface ens3 inet6 static
+    address 2001:db8:1234::10
+    netmask 64
+    gateway 2001:db8:1234::1
+    dns-nameservers 2606:4700:4700::1111 2001:4860:4860::8888
+```
+Adding extra routes with ifupdown (`up` and `down` run shell commands)
+```
+iface ens3 inet static
+    address 10.0.1.115
+    netmask 255.255.0.0
+    up ip route add 192.168.100.0/24 via 10.0.0.2
+    down ip route del 192.168.100.0/24 via 10.0.2
+```
+## systemd-networkd
+```
+[Match]
+Name=ens3
+[Network]
+Address=10.0.1.115/16
+Gateway=10.0.0.1
+DNS=1.1.1.1
+DNS=8.8.8.8
+Address=2001:db8:1234::10/64
+Gateway=2001:db8:1234::1
+DNS=2606:4700:4700::1111
+IPv6AcceptRA=no
+[Route]
+Destination=192.168.100.0/24
+Gateway=10.0.0.2
+```
+## Mapping
+ - `iface ens3 inet dhcp` becomes `DHCP=yes` under `[Network]` section
+ - `iface ens3 inet6 auto` becomes `IPv6AcceptRA=yes` under `[Network]` section
+ - `dns-nameservers` becomes `DNS=` under `[Network]`
+ - `up ip route add` becomes `Destionation=` and `Gateway` under `[Route]` section