在使用仅主机联网的虚拟功能(VNF)测试过程中，可以在实例的 tap 接口的 TX 队列中观察高数据包丢失。测试设置会将一个节点上的一个虚拟机的数据包发送到同一节点上的另一虚拟机。数据包丢失。
ip -s -s link ls dev tapc18eb09e-01
69: tapc18eb09e-01: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master qbrc18eb09e-01 state UNKNOWN mode DEFAULT qlen 1000
link/ether fe:16:3e:a5:17:c0 brd ff:ff:ff:ff:ff:ff
RX: bytes packets errors dropped overrun mcast
5500034259301 132047795 0 0 0 0
RX errors: length crc frame fifo missed
0 0 0 0 0
TX: bytes packets errors dropped carrier collsns
5481296464 81741449 0 11155280 0 0
TX errors: aborted fifo window heartbeat transns
0 0 0 0 0
ip -s -s link ls dev tapc18eb09e-01
69: tapc18eb09e-01: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master qbrc18eb09e-01 state UNKNOWN mode DEFAULT qlen 1000
link/ether fe:16:3e:a5:17:c0 brd ff:ff:ff:ff:ff:ff
RX: bytes packets errors dropped overrun mcast
5500034259301 132047795 0 0 0 0
RX errors: length crc frame fifo missed
0 0 0 0 0
TX: bytes packets errors dropped carrier collsns
5481296464 81741449 0 11155280 0 0
TX errors: aborted fifo window heartbeat transns
0 0 0 0 0
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