I add code in lib and ofproto direcotry. I wonder how to use VLOG? I include "vlog.h" and decalare VLOG_DEFINE_THIS_MODULE(FILENAME); Do I need more? Thanks -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.openvswitch.org/pipermail/ovs-dev/attachments/20140208/bfa22e4a/attachment-0003.html>