Internal Program Version: iproute2  5.1

iproute2 is a collection of user-space utilities to set up networking
under Linux from the command-line. It can inspect and configure,
among other things: interface paramters, IP addresses, routing,
tunnels, bridges, packet transformations (IPsec, etc.), and Quality
of Service.

https://www.linuxfoundation.org/collaborate/workgroups/networking/iproute2