ipackets: This is the number of packets received on the link.
opackets: Number of packets transmitted on the link.
rbytes: Total number of bytes received on the link.
obytes: Total number of bytes transmitted on the link.
ierrors: total number of packets that were received and marked as an error on the link.
oerrors: total number of packet that failed to be transmitted on the link because of an error.
The first line of the command shows the value of these counter since boot up, and each subsequent line is the delta from the previous line, i.e. the number in the previous second.
