At least one of your problems is the same as was recently discussed in this post: http://lists.noxrepo.org/pipermail/pox-dev-noxrepo.org/2013-May/000732.html
It also looks like your topology has a loop but that sufficient measures are not taken to prevent packets from looping. If your subnet splitting was working, this wouldn't be a loop for IP, but still would but for non-IP. This may be why you're getting a BUFFER_UNKNOWN area -- looped packets may be exhausting all the buffers. You need to somehow modify your controller to prevent looping. One way might be to change the resend_packet to OFPP_ALL to use OFPP_FLOOD instead and then run the openflow.spanning_tree component. You could also just modify it so that S7 and S8 use single-port output instead of flooding, never use one of the alternate paths, and don't do MAC learning. As a sidenote, you might want to take a look at the log module -- there's no need to tee into a file; the log module can be configured to just write a file for you. -- Murphy On May 23, 2013, at 2:55 PM, Alison Chan wrote: > Hello, > > I'm having trouble designing my controller to split traffic by ip > subnet. The relevant controller code, topology setup, and pox log file > are in the linked gist: > > https://gist.github.com/alis0nc/5639697 > > The topology and port assignnments look right as confirmed by 'net' in > mininet. Here is what I'm doing: > > * start mininet by sudo mn --custom ~/mininet/custom/topo-ac.py > --topo=mytopo --controller=remote,ip=127.0.0.1,port=6633 --mac > * set up IP addresses on the nodes as follows: > * h1: 10.0.0.1 > * h2: 10.0.0.129 > * h3: 10.0.0.2 > * h4: 10.0.0.130 > * start PoX by pox/pox.py misc.my_controller 2>&1 | tee -i poxlog.txt > * mininet> h1 ping -c1 h2 > * destination host unreachable > * wait about 5 seconds > * the errors start coming and don't stop > > This is really my first OF controller past the tutorial so I apologise > if I'm doing something really really stupid... But any assistance > would be appreciated. > > Cheers, > -- > Alison Chan > Kettering University (2015): BSCS (Security concentration), BSCE, Pre-Law > minor > Research Assistant, Department of Computer Science > Secretary, Kettering University Allies, A-Section > +1 909 278 7753 > [email protected] > > () ascii ribbon campaign for plain text email > /\ http://www.asciiribbon.org
