Have you looked at the POX log for any warnings (this is the first thing suggested by the FAQ entry on getting assistance)?
-- Murphy On Dec 5, 2013, at 1:53 PM, Slavica Tomovic <slavicat...@gmail.com> wrote: > Hi. I have problem with loops in my OpenFlow network. Topology is next: > > OFswitch1 ---- OFswitch2------------EthernetSwitch---------Internet > | \ / | > | \ / | > | /\ | > | / \ | > | / \ | > OFswitch3 OFswitch4 > \ / > \ / > OFswitch5 > | | > | | > Host1 Host2 > > I am using l2_learning and openflow.spanning_tree scripts. When I try to get > IP addresses via DHCP server, OFs2 receives DHCP requests, but there is no > any reply. It seems like loops are problem here because when I disconnect > OFs3 I can reach Internet. Can you give me some instruction what to do? I > have used spanning_tree without calling discovery script explicitly, because > I think that spanning_tree does that by itself. Am I right? I suppose that > many of U here had a similar problem so please help!