On Wed, Feb 25, 2015 at 6:50 AM, 我心永恒 <zhuzhuaiqiqi1...@gmail.com> wrote:
> Dear instructor, I'm a new student in the mininet/openflow-tutorial. I > want to seek for solutions for two problems I encountered. > > First one, In the section of "Learn Development Tools", when I set-up the > switch by adding new flows using the cmd "ovs-ofctl add-flow s1 > in_port=1,actions=output:2" and "ovs-ofctl add-flow s1 > in_port=2,actions=output:1", the two entries seem never expire in the > switch, but according to the tutorial, they owe to disappear after the > default duration (60 s), so I really cannot understand this. > You need to specify the flow idle or hard timeouts: e.g ovs-ofctl add-flow s1 hard_timeout=60,in_port=2,actions=output:1 > > Second one, in the subsection named "View Openflow Messages For Ping", I > can get the Hello/Features req/reply messages, but I cannot get the > packet-in, packet-out, flow-mod messages at all, they seem never appear in > the Wireshark window, I doubt the effect of the "controller ptcp:" command, > can it really trigger packet-in message upon a table miss? Or maybe this is > due to another problem still unknown to me, could you give me some hints? > > On OpenFlow 1.0 table miss behavior is send the packet for the controller. For your problem I would check if the controller connection with the switch is alive or check if there is not a wireshark filter hiding the messages. ps: my OS is ubuntu 14.04 LTS, Memory 15.5 GiB, Disk 705 GB, > processor Intel® Core™ i7-4800MQ CPU @ 2.70GHz × 8. Virtualization software > is VirtualBox, version: 4.3.10_Ubuntur93012, X11 version: X.Org X Server > 1.15.1. VM image is mn-2.2.0-trusty64server-141209-14-11-49. > > Expect your reply and gratitude in advance! > > Best Regards > Zhang Tianzhu > > _______________________________________________ > openflow-discuss mailing list > openflow-discuss@lists.stanford.edu > https://mailman.stanford.edu/mailman/listinfo/openflow-discuss > > -- Eder Leão Fernandes MSc Candidate Faculdade de Engenharia Elétrica e Computação Universidade de Campinas
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