When invoked with the -i flag, netstat will display
statistics for the network interfaces currently configured. If, in
addition, the -a option is given, it will print all
interfaces present in the kernel, not only those that have been
configured currently. On vstaout, the output from netstat
will look like this:
The MTU and Met fields show the current MTU and metric value for that
interface. The RX and TX columns show how many packets have been
received or transmitted error free (RX-OK/TX-OK), damaged
(RX-ERR/TX-ERR), how many were dropped (RX-DRP/TX-DRP), and how many
were lost because of an overrun (RX-OVR/TX-OVR).
The last column shows the flags that have been set for this interface.
These are one-character versions of the long flag names the are printed
when you display the interface configuration with ifconfig.