Arp reply can not be forward

[whsbk]

Topology

| pc1 | eth0--------------eth0.1 [ openwrt with openflow1.3 ] eth0.2------------eth0 | pc2|

pc1.eth0.ipaddr=192.168.2.202/24
pc2.eth0.ipaddr=192.168.2.1/24

Flows

inport=1, output=2
inport=2, output=1

Test Log

Arp reqeust received from eth0.1 and forward by the flow to eth0.2
Arp reply received from eth0.2 and forward by the flow to eth0.1.
Tcpdump with eth0.1 can get the arp reply packets, and the statis label in ifconfig command show the tx counter was increased.
But I can not find the arp reply packet by capture the packet on pc1.eth0.
It seem to be the flow has forward the arp reply but the NIC hardward does't work.