I just built a router and installed it with Ubuntu Server 14.04 LTS. The system has two NICs, one for the internal network and one for the external (
p3p1) network. I'd like to monitor external interface usage, but the
ifconfig counters are always at 0.
ip -s link ls p3p1 shows zero for all counters as does
cat /proc/net/dev. The internal interface (
em1) counters work fine. According to
lspci, the external interface is a Qualcomm Atheros AR8161 Gigabit Ethernet (rev 10).
Other than the counters, it works fine. How do I get the counters working on this device?