ifmetric
manipulates IPv4 route metrics for network interfaces
TLDR
Set the priority of a network interface (higher number = lower priority)
$ sudo ifmetric [interface] [value]
Reset the priority of an interface to default$ sudo ifmetric [interface] 0
Prefer wired over wireless by giving wireless a higher metric$ sudo ifmetric wlan0 100
SYNOPSIS
ifmetric interface metric
DESCRIPTION
ifmetric manipulates IPv4 route metrics for network interfaces. Route metrics determine which interface is preferred when multiple routes to the same destination exist - lower metric values have higher priority.This is useful for systems with multiple network connections (e.g., wired and wireless) where you want to control which connection is preferred for outgoing traffic.
PARAMETERS
interface
Name of the network interface (e.g., eth0, wlan0)metric
Route metric value (higher values mean lower priority, 0 resets to default)
INSTALL
sudo apt install ifmetric
nix profile install nixpkgs#ifmetric
CAVEATS
Requires root privileges. Only affects IPv4 routes. Changes are not persistent across reboots unless scripted. Does not work with IPv6 routes.
HISTORY
ifmetric was created by Lennart Poettering (who later created PulseAudio and systemd) to provide a simple way to manipulate routing metrics without complex ip route commands.
