> "input port" % (dpid, inport, str(dstaddr))) Looks like you missed the formatting symbols. "input port %s %s %s" % (str(dpid), str(inport), str(dstaddr))) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.noxrepo.org/pipermail/pox-dev-noxrepo.org/attachments/20131211/7eb3e2e2/attachment-0002.htm>