(In my previous message, ARM should have read ARP.) On Fri, May 24, 2013 at 4:23 PM, Alison Chan <[email protected]> wrote: > https://gist.github.com/alis0nc/5639697#file-my_controller-py > I've added a match for ARP and made sure of the prerequisite as per > that other posting. I haven't seen a loop error since. Also, s7 and s8 > don't learn or flood anyway, they're handled in start_switch and the > l2 learning method is in the 'else' clause. > > Pinging to a host on the same 'side' works now, and I've gotten rid of > all the errors. But one side still can't talk to the other side. Am I > doing ARM wrong? > > On Fri, May 24, 2013 at 1:13 AM, Murphy McCauley > <[email protected]> wrote: >> 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 >> > > > > -- > 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
-- 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
