[pox-dev] Spanning tree problem!

[Murphy McCauley]

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.cg at 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!