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?


Finally figured out the correct Google query to find an answer: it's fixed in kernel 3.14. Ubuntu 14.04 LTS installs kernel 3.13.

The original bug report

Thread stating when it was fixed

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