IOV和ETH

⑴ ip link set eth0 vf 1 vlan 2 qos 2 這句命令中的vlan 2 和vf 1是怎麼來的

vlan 2 指的是你要設置這個網卡綁定到那個 vlan id
vf 1 指簡化的物理網卡 IO 通道，一個網卡可以有多個通道.

PF是一個完整的PCIe設備，VF是一個簡化的PCIe設備，僅僅包含了I/O功能
用這個功能首先你要有 SR-IOV 設備

一個 SR-IOV 設備的例子，他有 5 通道

# ip link show dev eth2
7: eth2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ether 00:02:c9:e6:01:12 brd ff:ff:ff:ff:ff:ff
vf 0 MAC 00:00:00:00:00:00, vlan 4095, spoof checking off, link-state auto
vf 1 MAC 00:00:00:00:00:00, vlan 4095, spoof checking on, link-state enable
vf 2 MAC 00:00:00:00:00:00, vlan 4095, spoof checking off, link-state disable
vf 3 MAC 00:00:00:00:00:00, vlan 4095, spoof checking off, link-state auto
vf 4 MAC 00:00:00:00:00:00, vlan 4095, spoof checking off, link-state auto
vf 5 MAC 00:00:00:00:00:00, vlan 4095, spoof checking off, link-state auto