I recently installed arch onto my raspberry pi and noticed two network interfaces I was unfamiliar with. After some researching I think I understand they are related to traffic shaping.
Can someone help me understand what these devices are used for and why they were present on a default installation of arch (on raspberry pie)
2: ifb0: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 32
link/ether 02:9e:4d:52:29:f7 brd ff:ff:ff:ff:ff:ff
3: ifb1: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 32
link/ether 12:a4:74:40:d0:ab brd ff:ff:ff:ff:ff:ff