[pox-dev] how to use l2_multi ?

[Guangvy]

Hi all,
     Run " ./pox.py forwarding.l2_multi " on my machine,  and OVS connected POX 
correctly.
I found Packet_IN have send to POX, but POX l2_multi not handle it .
Does run " ./pox.py forwarding.l2_multi " is correct? or how to use l2_multi?