Wireless (General)

  • 1.  Simulating an Openflow controller

    Posted 03-03-2016 08:44
    is there any simulator for using Openflow controller instead of Open-Flow Switches ..if so , Pls guide me


  • 2.  RE: Simulating an Openflow controller

    Posted 03-14-2016 14:06
    Mininet is what everyone uses for testing with openflow nodes.

    Tutorial:
    https://github.com/mininet/openflow-tutorial/wiki

    Video:
    https://www.youtube.com/watch?v=jmlgXaocwiE


  • 3.  RE: Simulating an Openflow controller

    Posted 06-06-2016 02:55
    You could also use the following:
    HPE-VAN SDN Controller with Flowmaker Deluxe
    Floodlight
    Opendaylight
    Ryu
    ONOS

    No idea if they work with any Extreme switches, but they work fine with PicOS and Mininet.


  • 4.  RE: Simulating an Openflow controller

    Posted 06-06-2016 02:55
    floodlight is working, but a bit limited (at least was when I used it). Opendaylight will work too. Never tested the others.


  • 5.  RE: Simulating an Openflow controller

    Posted 06-06-2016 14:39
    To test OpenFlow support of EXOS switches (with openflow.xmod and appropriate license installed) without installing a controller, one can use the "dpctl" utility from the openflow Git repository git://yuba.stanford.edu/openflow .



  • 6.  RE: Simulating an Openflow controller

    Posted 06-06-2016 14:39
    Hm, dpctl cannot be used with EXOS based switches, because EXOS does not correctly configure a "passive" controller. The "passive" controller seems to listen on localhost only:
    Controller : Secondary
    Status : INACTIVE
    Datapath ID : 00000800273d25b3
    VR : VR-Mgmt
    Mode : out-of-band Passive
    Target : ptcp:127.0.0.1:6633
    Uptime(secs) : 0
    [/code]As a result dpctl cannot connect to the switch:
    [/code][/code]$ ./dpctl show tcp:192.168.42.3:6633
    dpctl: talking to tcp:192.168.42.3:6633: Connection refused
    $ telnet 192.168.42.3
    Trying 192.168.42.3...
    telnet: Unable to connect to remote host: Connection refused
    $ ping -c1 192.168.42.3
    PING 192.168.42.3 (192.168.42.3) 56(84) bytes of data.
    64 bytes from 192.168.42.3: icmp_seq=1 ttl=64 time=1.13 ms

    --- 192.168.42.3 ping statistics ---
    1 packets transmitted, 1 received, 0% packet loss, time 0ms
    rtt min/avg/max/mdev = 1.135/1.135/1.135/0.000 ms
    $ ssh admin@192.168.42.3 "show openflow"
    admin@192.168.42.3's password:
    OpenFlow: Enabled
    Versions: OpenFlow10, OpenFlow13
    Mode: Standard
    FDB: On
    Access-list width: Single

    ---< further output omitted >---[/code]Just tested with EXOS 21.1.1.4, which includes OpenFlow in the base image.

    :-(