Table 1. Example /proc/net/dev File

Inter-|   Receive                  | Transmit 
face  |packets errs drop fifo frame|packets errs drop fifo colls carrier
 lo:       285    0    0    0     0     285    0    0    0     0    0
 tunl0:      0    0    0    0     0       0    0    0    0     0    0
 tunl1:      0    0    0    0     0       0    0    0    0     0    0
 eth0:      59    0    0    0     0    2474    0    0    0     0    0
 ppp0:     317    0    0    0     0     241    0    0    0     0    0