O que é a interface cni0 vista no ifconfig

Question

O que a interface cni0 denota?

 cni0    Link encap:Ethernet HWaddr 00:50:F1:80:00:00 
         UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1 
         RX packets:3 errors:0 dropped:0 overruns:0 frame:0 
         TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 
         collisions:0 txqueuelen:1000 
         RX bytes:60 (60.0 B) 
         TX bytes:0 (0.0 B)

Referência: link

Atenciosamente

Ed