*******BELOW METRICS ARE MULTI DIRECTIONS*******
1. proc.net.bytes iface=<interface> direction=<in/out>
2. proc.net.packets iface=<interface> direction=<in/out>
3. proc.net.errs iface=<interface> direction=<in/out>
4. proc.net.dropped iface=<interface> direction=<in/out>
5. proc.net.fifo.errs iface=<interface> direction=<in/out>
6. proc.net.frame.errs iface=<interface> direction=<in/out>
*******BELOW METRICS ONLY IN ONE DIRECTION*******
7. proc.net.compressed iface=<interface> direction=in
8. proc.net.multicast iface=<interface> direction=in
9. proc.net.collisions iface=<interface> direction=out
10. proc.net.carrier.errs iface=<interface> direction=out