Hi,

On 2016年07月18日 02:11, Deepak Jose wrote:
> Hi Team,
>
> I'm trying to learn ryu and followed the ryu documentation for my learning. I 
> have created 3 hosts, 1 switch and 1 controller using 'sudo mn --topo 
> single,3 --mac --switch ovsk --controller remote -x'. But when I try to 
> laucnh ryu-manager from controller, it gets hung as shown in logs below. Also 
> ovs-dpctl gave some errors.
> Can someone check the logs and help me to move forward or debug this issue?
>
> root@mininet-vm:~# ryu-manager --verbose ryu.app.simple_switch_13
> loading app ryu.app.simple_switch_13
> loading app ryu.controller.ofp_handler
> instantiating app ryu.app.simple_switch_13 of SimpleSwitch13
> instantiating app ryu.controller.ofp_handler of OFPHandler
> BRICK SimpleSwitch13
>   CONSUMES EventOFPSwitchFeatures
>   CONSUMES EventOFPPacketIn
> BRICK ofp_event
>   PROVIDES EventOFPSwitchFeatures TO {'SimpleSwitch13': set(['config'])}
>   PROVIDES EventOFPPacketIn TO {'SimpleSwitch13': set(['main'])}
>   CONSUMES EventOFPErrorMsg
>   CONSUMES EventOFPPortDescStatsReply
>   CONSUMES EventOFPEchoRequest
>   CONSUMES EventOFPEchoReply
>   CONSUMES EventOFPHello
>   CONSUMES EventOFPPortStatus
>   CONSUMES EventOFPSwitchFeatures
> <No processing after this>

According the above messages, Ryu seems to be waiting for the connection from 
OVS and working well.

>
> root@mininet-vm:~/openvswitch/openvswitch-2.5.0/ovsdb# ovs-dpctl show
> 2016-07-17T17:08:37Z|00001|dpif_netlink|ERR|Generic Netlink family 
> 'ovs_datapath' does not exist. The Open vSwitch kernel module is probably not 
> loaded.
> 2016-07-17T17:08:37Z|00002|dpif|WARN|failed to enumerate system datapaths: No 
> such file or directory

It seems that OVS kernel module is not loaded.
How about trying this command and restarting OVS?
  e.g.)
   sudo depmod
   sudo modprobe openvswitch

Thank,
Iwase

>
> Thanks,
> Deepak
>
>
> ------------------------------------------------------------------------------
> What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic
> patterns at an interface-level. Reveals which users, apps, and protocols are
> consuming the most bandwidth. Provides multi-vendor support for NetFlow,
> J-Flow, sFlow and other flows. Make informed decisions using capacity planning
> reports.http://sdm.link/zohodev2dev
>
>
>
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------------------------------------------------------------------------------
What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic
patterns at an interface-level. Reveals which users, apps, and protocols are 
consuming the most bandwidth. Provides multi-vendor support for NetFlow, 
J-Flow, sFlow and other flows. Make informed decisions using capacity planning
reports.http://sdm.link/zohodev2dev
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