The Fodora 20 system was installed with quad-port XL710 NIC. By default, the NIC driver creates 4 queues per port and both IPv4+UDP/TCP(udp4/tcp4) and IPv6+UDP/TCP(udp6/tcp6) for RSS are enabled. It loads IPv4+UDP/TCP traffic with different IPs to different queues(cores).
But All IPv6+UDP/TCP traffic with different IPs was directed to only one queue(one core). Reconfiguration of rx-flow-hash for udp6 or tcp6 by ethtool did not solve the issue.
The other problem is all IPv4 or IPv6 traffic with different IPs was also directed to only one queue when only IPv4 or IPv6 RSS enabled.
System: Fedora 20
Kernel: 3.19.8-100.fc20.x86_64
NIC: quad-port XL710
Driver: i40e
Version: 1.2.2-k
Firmware-version: f4.1 a1.1 n04.10 e80001109
