Re: [Ryu-devel] Stp on Openvswitch

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Hi Iwase ,

Thank you for your prompt reply. Yes I'm talking about those dpid's.

As I said before I have 3 OVS switches running on three separate machines and all of them are connected to the controller running on a different machine through a normal switch.

I think this switch is the reason why there are two extra dpid's being produced . 
But this shouldn’t interfere with the stp, right?.
Then why are the ports on my Ovs switches still being Disabled as shown in the previous log.

If you have any idea please let me know.

Mit freundlichen Grüßen / Best regards

 Harsha Vardhan
Communication Technology (CR/AEH4) 

fix...@de...

-----Ursprüngliche Nachricht-----
Von: Yusuke Iwase [mailto:iwa...@gm...] 
Gesendet: Dienstag, 14. April 2015 05:03
An: FIXED-TERM Vardhan Harsha (CR/AEH4)
Cc: ryu...@li...
Betreff: Re: AW: [Ryu-devel] Stp on Openvswitch

Hi Vardhan,

Please keep the mailing list.
  Ryu-devel <ryu...@li...>

> but it still doesn't use the dpid which I configured.

From the log, it seems 4 switches are in your topology as following.

[STP][INFO] dpid=0000000000000004: Join as stp bridge.
[STP][INFO] dpid=0000000000000003: Join as stp bridge.
[STP][INFO] dpid=00000010f33aca7b: Join as stp bridge.
[STP][INFO] dpid=00000010f33acb09: Join as stp bridge.

You mean "dpid=0000000000000004 and dpid=0000000000000003 should not join into STP network", right?

If so, simple_switch_stp.py joins all the switch which connecting to the conntroller into STP network.
Even if you omit stplib.Stp.set_config() for the particular switch,
the switch is configured by the default value.
  (https://github.com/osrg/ryu/blob/master/ryu/lib/stplib.py#L197-L231)

Thanks,
Iwase

On 2015年04月14日 00:03, FIXED-TERM Vardhan Harsha (CR/AEH4) wrote:
> Hi Iwase,
> 
> Ignore my previous mail. Stp application loaded perfectly. I had made some error so now the application runs perfectly but it still doesn’t use the dpid which I configured.
> 
> So here is the log :
> 
> $ PYTHONPATH= ./bin/ryu-manager --observe-links --verbose ryu/app/simple_switch_stp.py ryu/app/rest_topology.py
> loading app ryu/app/simple_switch_stp.py
> ...............................................
> ........
> ........................................
> ................
> 
> [STP][INFO] dpid=0000000000000004: Join as stp bridge.
> [STP][INFO] dpid=0000000000000003: Join as stp bridge.
> [STP][INFO] dpid=00000010f33aca7b: Join as stp bridge.
> EVENT stplib->SimpleSwitchStp EventPortStateChange
> [STP][DEBUG] dpid=00000010f33aca7b: [port=1] Send Config BPDU.
> [dpid=00000010f33aca7b][port=1] state=LISTEN
> [STP][DEBUG] dpid=00000010f33aca7b: [port=1] Start port state machine.
> EVENT stplib->SimpleSwitchStp EventPortStateChange
> [STP][INFO] dpid=00000010f33aca7b: [port=1] DESIGNATED_PORT     / LISTEN
> [STP][DEBUG] dpid=00000010f33aca7b: [port=2] Send Config BPDU.
> [dpid=00000010f33aca7b][port=2] state=LISTEN
> [STP][DEBUG] dpid=00000010f33aca7b: [port=2] Start port state machine.
> [STP][INFO] dpid=00000010f33aca7b: [port=2] DESIGNATED_PORT     / LISTEN
> EVENT ofp_event->switches EventOFPPortStatus
> EVENT ofp_event->stplib EventOFPPortStatus
> [STP][INFO] dpid=00000010f33aca7b: [port=1] Link down.
> EVENT stplib->SimpleSwitchStp EventPortStateChange
> [dpid=00000010f33aca7b][port=1] state=DISABLE
> [STP][INFO] dpid=00000010f33aca7b: [port=1] DESIGNATED_PORT     / DISABLE
> EVENT ofp_event->switches EventOFPPortStatus
> EVENT ofp_event->stplib EventOFPPortStatus
> [STP][INFO] dpid=00000010f33aca7b: [port=2] Link down.
> EVENT stplib->SimpleSwitchStp EventPortStateChange
> [dpid=00000010f33aca7b][port=2] state=DISABLE
> [STP][INFO] dpid=00000010f33aca7b: [port=2] DESIGNATED_PORT     / DISABLE
> [STP][INFO] dpid=00000010f33acb09: Join as stp bridge.
> EVENT stplib->SimpleSwitchStp EventPortStateChange
> [STP][DEBUG] dpid=00000010f33acb09: [port=1] Send Config BPDU.
> [dpid=00000010f33acb09][port=1] state=LISTEN
> [STP][DEBUG] dpid=00000010f33acb09: [port=1] Start port state machine.
> EVENT stplib->SimpleSwitchStp EventPortStateChange
> [STP][INFO] dpid=00000010f33acb09: [port=1] DESIGNATED_PORT     / LISTEN
> [STP][DEBUG] dpid=00000010f33acb09: [port=2] Send Config BPDU.
> [dpid=00000010f33acb09][port=2] state=LISTEN
> [STP][DEBUG] dpid=00000010f33acb09: [port=2] Start port state machine.
> [STP][INFO] dpid=00000010f33acb09: [port=2] DESIGNATED_PORT     / LISTEN
> EVENT ofp_event->switches EventOFPPortStatus
> EVENT ofp_event->stplib EventOFPPortStatus
> [STP][INFO] dpid=00000010f33acb09: [port=1] Link down.
> EVENT stplib->SimpleSwitchStp EventPortStateChange
> [dpid=00000010f33acb09][port=1] state=DISABLE
> [STP][INFO] dpid=00000010f33acb09: [port=1] DESIGNATED_PORT     / DISABLE
> EVENT ofp_event->switches EventOFPPortStatus
> EVENT ofp_event->stplib EventOFPPortStatus
> [STP][INFO] dpid=00000010f33aca7b: [port=1] Link up.
> EVENT stplib->SimpleSwitchStp EventPortStateChange
> [STP][DEBUG] dpid=00000010f33aca7b: [port=1] Send Config BPDU.
> [dpid=00000010f33aca7b][port=1] state=LISTEN
> [STP][INFO] dpid=00000010f33aca7b: [port=1] DESIGNATED_PORT     / LISTEN
> EVENT ofp_event->switches EventOFPPortStatus
> EVENT ofp_event->stplib EventOFPPortStatus
> [STP][INFO] dpid=00000010f33aca7b: [port=1] Link down.
> EVENT stplib->SimpleSwitchStp EventPortStateChange
> [dpid=00000010f33aca7b][port=1] state=DISABLE
> [STP][INFO] dpid=00000010f33aca7b: [port=1] DESIGNATED_PORT     / DISABLE
> [STP][DEBUG] dpid=00000010f33acb09: [port=2] Send Config BPDU.
> EVENT ofp_event->switches EventOFPPortStatus
> EVENT ofp_event->stplib EventOFPPortStatus
> [STP][INFO] dpid=00000010f33aca7b: [port=2] Link up.
> EVENT stplib->SimpleSwitchStp EventPortStateChange
> [STP][DEBUG] dpid=00000010f33aca7b: [port=2] Send Config BPDU.
> [dpid=00000010f33aca7b][port=2] state=LISTEN
> [STP][INFO] dpid=00000010f33aca7b: [port=2] DESIGNATED_PORT     / LISTEN
> EVENT ofp_event->switches EventOFPPortStatus
> EVENT ofp_event->stplib EventOFPPortStatus
> [STP][INFO] dpid=00000010f33aca7b: [port=1] Link up.
> EVENT stplib->SimpleSwitchStp EventPortStateChange
> [STP][DEBUG] dpid=00000010f33aca7b: [port=1] Send Config BPDU.
> [dpid=00000010f33aca7b][port=1] state=LISTEN
> 
> And here is the code change in simple_switch_stp.py:
> 
> class SimpleSwitchStp(app_manager.RyuApp):
> OFP_VERSIONS = [ofproto_v1_0.OFP_VERSION]
> _CONTEXTS = {'stplib': stplib.Stp}
> def __init__(self, *args, **kwargs):
>  super(SimpleSwitchStp, self).__init__(*args, **kwargs)
>         self.mac_to_port = {}
>      self.stp = kwargs['stplib']
>         # Sample of stplib config.
>         #  please refer to stplib.Stp.set_config() for details.
>         config = {
>                   dpid_lib.str_to_dpid('00000010f33acafb'):
>                     {'bridge': {'priority': 0xa000}},
>                   dpid_lib.str_to_dpid('00000010f33aca7b'):
>                      {'bridge': {'priority': 0xa000}},
> 		       dpid_lib.str_to_dpid('00000010f33acb09'):
>                      {'bridge': {'priority': 0xa000}}}
>         self.stp.set_config(config)
>         
> 
>  
> 
> Mit freundlichen Grüßen / Best regards
> 
>  Harsha Vardhan
> Communication Technology (CR/AEH4) 
> 
> fix...@de...
> 
> 
> 
> -----Ursprüngliche Nachricht-----
> Von: Yusuke Iwase [mailto:iwa...@gm...] 
> Gesendet: Montag, 13. April 2015 02:01
> An: FIXED-TERM Vardhan Harsha (CR/AEH4); ryu...@li...
> Betreff: Re: [Ryu-devel] Stp on Openvswitch
> 
> Hi Vardhan,
> 
> 
> Thank you for sending the log.
> It seemed that dpid is not matching.
> 
>> EVENT ofp_event->stplib EventOFPStateChange
>> [STP][INFO] dpid=0000000000000004: Join as stp bridge.
>> [STP][INFO] dpid=0000000000000002: Join as stp bridge.
>> [STP][INFO] dpid=0000000000000001: Join as stp bridge.
> ...
>> EVENT ofp_event->stplib EventOFPStateChange
>> [STP][INFO] dpid=00000010f33acb09: Join as stp bridge.
> ...
> 
> 
> Please remove the following comment-out and specify dpid in accordance with your environment.
>  (https://github.com/osrg/ryu/blob/master/ryu/app/simple_switch_stp.py#L38-L47)
> 
> Because simple_switch_stp.py is the sample application, dpid needs to be specified.
> 
> 
> Thanks,
> Iwase
> 
> On 2015年04月10日 18:27, FIXED-TERM Vardhan Harsha (CR/AEH4) wrote:
>> Hi Iwase,
>>
>> When I use mininet to simulate the switches the RYU STP application work flawlessly.
>> But while using Ovs switches on hardware the problems arises. 
>>
>> Here is RYU-manager log:
>>
>> PYTHONPATH= ./bin/ryu-manager --observe-links --verbose ryu/app/simple_switch_stp.py 
>> loading app ryu/app/simple_switch_stp.py
>> loading app ryu.controller.ofp_handler
>> ...
>> EVENT ofp_event->stplib EventOFPStateChange
>> [STP][INFO] dpid=0000000000000004: Join as stp bridge.
>> [STP][INFO] dpid=0000000000000002: Join as stp bridge.
>> [STP][INFO] dpid=0000000000000001: Join as stp bridge.
>>
>> EVENT ofp_event->stplib EventOFPStateChange
>> [STP][INFO] dpid=00000010f33acb09: Join as stp bridge.
>> EVENT stplib->SimpleSwitchStp EventPortStateChange
>> [STP][DEBUG] dpid=00000010f33acb09: [port=1] Send Config BPDU.
>> [dpid=00000010f33acb09][port=1] state=LISTEN
>> [STP][DEBUG] dpid=00000010f33acb09: [port=1] Start port state machine.
>> EVENT stplib->SimpleSwitchStp EventPortStateChange
>> [STP][INFO] dpid=00000010f33acb09: [port=1] DESIGNATED_PORT     / LISTEN
>> [STP][DEBUG] dpid=00000010f33acb09: [port=2] Send Config BPDU.
>> [dpid=00000010f33acb09][port=2] state=LISTEN
>> [STP][DEBUG] dpid=00000010f33acb09: [port=2] Start port state machine.
>> [STP][INFO] dpid=00000010f33acb09: [port=2] DESIGNATED_PORT     / LISTEN
>> EVENT ofp_event->stplib EventOFPPortStatus
>> [STP][INFO] dpid=00000010f33acafb: [port=1] Link down.
>> EVENT stplib->SimpleSwitchStp EventPortStateChange
>> [dpid=00000010f33acafb][port=1] state=DISABLE
>> [STP][INFO] dpid=00000010f33acafb: [port=1] DESIGNATED_PORT     / DISABLE
>> EVENT ofp_event->stplib EventOFPPortStatus
>> [STP][INFO] dpid=00000010f33acb09: [port=1] Link down.
>> EVENT stplib->SimpleSwitchStp EventPortStateChange
>> [dpid=00000010f33acb09][port=1] state=DISABLE
>> [STP][INFO] dpid=00000010f33acb09: [port=1] DESIGNATED_PORT     / DISABLE
>> EVENT ofp_event->stplib EventOFPStateChange
>> [STP][INFO] dpid=00000010f33aca7b: Join as stp bridge.
>> EVENT stplib->SimpleSwitchStp EventPortStateChange
>> [STP][DEBUG] dpid=00000010f33aca7b: [port=1] Send Config BPDU.
>> [dpid=00000010f33aca7b][port=1] state=LISTEN
>> [STP][DEBUG] dpid=00000010f33aca7b: [port=1] Start port state machine.
>> EVENT stplib->SimpleSwitchStp EventPortStateChange
>> [STP][INFO] dpid=00000010f33aca7b: [port=1] DESIGNATED_PORT     / LISTEN
>> [STP][DEBUG] dpid=00000010f33aca7b: [port=2] Send Config BPDU.
>> [dpid=00000010f33aca7b][port=2] state=LISTEN
>> [STP][DEBUG] dpid=00000010f33aca7b: [port=2] Start port state machine.
>> [STP][INFO] dpid=00000010f33aca7b: [port=2] DESIGNATED_PORT     / LISTEN
>> EVENT ofp_event->stplib EventOFPPortStatus
>> EVENT ofp_event->stplib EventOFPPortStatus
>> [STP][INFO] dpid=00000010f33aca7b: [port=1] Link down.
>> EVENT stplib->SimpleSwitchStp EventPortStateChange
>> [dpid=00000010f33aca7b][port=1] state=DISABLE
>> [STP][INFO] dpid=00000010f33aca7b: [port=1] DESIGNATED_PORT     / DISABLE
>> [STP][INFO] dpid=00000010f33aca7b: [port=2] Link down.
>> EVENT stplib->SimpleSwitchStp EventPortStateChange
>> [dpid=00000010f33aca7b][port=2] state=DISABLE
>> [STP][INFO] dpid=00000010f33aca7b: [port=2] DESIGNATED_PORT     / DISABLE
>> EVENT ofp_event->stplib EventOFPPortStatus
>> [STP][INFO] dpid=00000010f33acafb: [port=2] Link down.
>> EVENT stplib->SimpleSwitchStp EventPortStateChange
>> [dpid=00000010f33acafb][port=2] state=DISABLE
>> [STP][INFO] dpid=00000010f33acafb: [port=2] DESIGNATED_PORT     / DISABLE
>> EVENT ofp_event->stplib EventOFPPortStatus
>> [STP][INFO] dpid=00000010f33acb09: [port=2] Link down.
>> EVENT stplib->SimpleSwitchStp EventPortStateChange
>> [dpid=00000010f33acb09][port=2] state=DISABLE
>> [STP][INFO] dpid=00000010f33acb09: [port=2] DESIGNATED_PORT     / DISABLE
>> EVENT ofp_event->stplib EventOFPPortStatus
>> [STP][INFO] dpid=00000010f33acafb: [port=1] Link up.
>> EVENT stplib->SimpleSwitchStp EventPortStateChange
>> [STP][DEBUG] dpid=00000010f33acafb: [port=1] Send Config BPDU.
>> [dpid=00000010f33acafb][port=1] state=LISTEN
>> [STP][INFO] dpid=00000010f33acafb: [port=1] DESIGNATED_PORT     / LISTEN
>> EVENT ofp_event->stplib EventOFPPortStatus
>> [STP][INFO] dpid=00000010f33aca7b: [port=1] Link up.
>> EVENT stplib->SimpleSwitchStp EventPortStateChange
>> [STP][DEBUG] dpid=00000010f33aca7b: [port=1] Send Config BPDU.
>> [dpid=00000010f33aca7b][port=1] state=LISTEN
>> [STP][INFO] dpid=00000010f33aca7b: [port=1] DESIGNATED_PORT     / LISTEN
>> EVENT ofp_event->stplib EventOFPPacketIn
>> [STP][INFO] dpid=00000010f33acafb: [port=1] Receive superior BPDU.
>> EVENT stplib->SimpleSwitchStp EventPortStateChange
>> [dpid=00000010f33acafb][port=1] state=BLOCK
>> [STP][INFO] dpid=00000010f33acafb: [port=1] DESIGNATED_PORT     / BLOCK
>> [STP][INFO] dpid=00000010f33acafb: Non root bridge.
>> EVENT stplib->SimpleSwitchStp EventPortStateChange
>> [dpid=00000010f33acafb][port=1] state=LISTEN
>> [STP][INFO] dpid=00000010f33acafb: [port=1] ROOT_PORT           / LISTEN
>> EVENT ofp_event->stplib EventOFPPortStatus
>> [STP][INFO] dpid=00000010f33acb09: [port=1] Link up.
>> EVENT stplib->SimpleSwitchStp EventPortStateChange
>> [STP][DEBUG] dpid=00000010f33acb09: [port=1] Send Config BPDU.
>> [dpid=00000010f33acb09][port=1] state=LISTEN
>> [STP][INFO] dpid=00000010f33acb09: [port=1] DESIGNATED_PORT     / LISTEN
>> EVENT ofp_event->stplib EventOFPPortStatus
>> [STP][INFO] dpid=00000010f33aca7b: [port=2] Link up.
>> EVENT stplib->SimpleSwitchStp EventPortStateChange
>> [STP][DEBUG] dpid=00000010f33aca7b: [port=2] Send Config BPDU.
>> [dpid=00000010f33aca7b][port=2] state=LISTEN
>> [STP][INFO] dpid=00000010f33aca7b: [port=2] DESIGNATED_PORT     / LISTEN
>> EVENT ofp_event->stplib EventOFPPortStatus
>> [STP][INFO] dpid=00000010f33acafb: [port=1] Link down.
>> EVENT stplib->SimpleSwitchStp EventPortStateChange
>> [dpid=00000010f33acafb][port=1] state=DISABLE
>> [STP][INFO] dpid=00000010f33acafb: [port=1] DESIGNATED_PORT     / DISABLE
>> EVENT stplib->SimpleSwitchStp EventTopologyChange
>> [STP][INFO] dpid=00000010f33acafb: Root bridge.
>> [dpid=00000010f33acafb] Receive topology change event. Flush MAC table.
>> EVENT ofp_event->stplib EventOFPPortStatus
>> EVENT ofp_event->stplib EventOFPPortStatus
>> [STP][INFO] dpid=00000010f33aca7b: [port=1] Link down.
>> EVENT stplib->SimpleSwitchStp EventPortStateChange
>> [dpid=00000010f33aca7b][port=1] state=DISABLE
>> [STP][INFO] dpid=00000010f33aca7b: [port=1] DESIGNATED_PORT     / DISABLE
>> [STP][INFO] dpid=00000010f33aca7b: [port=2] Link down.
>> EVENT stplib->SimpleSwitchStp EventPortStateChange
>> [dpid=00000010f33aca7b][port=2] state=DISABLE
>> [STP][INFO] dpid=00000010f33aca7b: [port=2] DESIGNATED_PORT     / DISABLE
>> EVENT ofp_event->stplib EventOFPPortStatus
>> [STP][INFO] dpid=00000010f33acb09: [port=1] Link down.
>> EVENT stplib->SimpleSwitchStp EventPortStateChange
>> [dpid=00000010f33acb09][port=1] state=DISABLE
>> [STP][INFO] dpid=00000010f33acb09: [port=1] DESIGNATED_PORT     / DISABLE
>> EVENT ofp_event->stplib EventOFPPortStatus
>> [STP][INFO] dpid=00000010f33aca7b: [port=1] Link up.
>> EVENT stplib->SimpleSwitchStp EventPortStateChange
>> [STP][DEBUG] dpid=00000010f33aca7b: [port=1] Send Config BPDU.
>> [dpid=00000010f33aca7b][port=1] state=LISTEN
>> [STP][INFO] dpid=00000010f33aca7b: [port=1] DESIGNATED_PORT     / LISTEN
>> EVENT ofp_event->stplib EventOFPPortStatus
>> [STP][INFO] dpid=00000010f33acafb: [port=1] Link up.
>> EVENT stplib->SimpleSwitchStp EventPortStateChange
>> [STP][DEBUG] dpid=00000010f33acafb: [port=1] Send Config BPDU.
>> [dpid=00000010f33acafb][port=1] state=LISTEN
>> [STP][INFO] dpid=00000010f33acafb: [port=1] DESIGNATED_PORT     / LISTEN
>> EVENT ofp_event->stplib EventOFPPortStatus
>> [STP][INFO] dpid=00000010f33aca7b: [port=1] Link down.
>> EVENT stplib->SimpleSwitchStp EventPortStateChange
>> [dpid=00000010f33aca7b][port=1] state=DISABLE
>> [STP][INFO] dpid=00000010f33aca7b: [port=1] DESIGNATED_PORT     / DISABLE
>> EVENT ofp_event->stplib EventOFPPortStatus
>> [STP][INFO] dpid=00000010f33acafb: [port=1] Link down.
>> EVENT stplib->SimpleSwitchStp EventPortStateChange
>> [dpid=00000010f33acafb][port=1] state=DISABLE
>> [STP][INFO] dpid=00000010f33acafb: [port=1] DESIGNATED_PORT     / DISABLE.
>>
>> Is it an Ovs bug because as I have understood , Ovs drops the BPDU packets if STP isn’t enabled on the switch.
>> Anyways hope the log helps figure out the problem.
>>
>>
>>  
>>
>> Mit freundlichen Grüßen / Best regards
>>
>>  Harsha Vardhan
>> Communication Technology (CR/AEH4) 
>>
>> fix...@de...
>>
>>
>> -----Ursprüngliche Nachricht-----
>> Von: Yusuke Iwase [mailto:iwa...@gm...] 
>> Gesendet: Freitag, 10. April 2015 05:01
>> An: FIXED-TERM Vardhan Harsha (CR/AEH4)
>> Cc: ryu...@li...
>> Betreff: Re: [Ryu-devel] Stp on Openvswitch 
>>
>> Hi Vardhan,
>>
>> In my environment (on mininet), simple_switch_stp_13.py works well.
>>
>>
>> $ ovs-vsctl --version
>> ovs-vsctl (Open vSwitch) 2.3.90
>> Compiled Apr  6 2015 16:38:58
>> DB Schema 7.12.1
>> $ 
>>
>>
>> $ git diff
>> diff --git a/ryu/lib/packet/bpdu.py b/ryu/lib/packet/bpdu.py
>> index 8926b2a..1453434 100644
>> --- a/ryu/lib/packet/bpdu.py
>> +++ b/ryu/lib/packet/bpdu.py
>> @@ -134,7 +134,7 @@ from ryu.lib import addrconv
>>  
>>  
>>  # BPDU destination
>> -BRIDGE_GROUP_ADDRESS = '01:80:c2:00:00:00'
>> +BRIDGE_GROUP_ADDRESS = '01:80:c2:00:00:0e'
>>  
>>  
>>  PROTOCOL_IDENTIFIER = 0
>> $
>>
>>
>> $ sudo python setup.py install
>> ...
>> running install_scripts
>> Installing ryu-manager script to /usr/local/bin
>> Installing ryu script to /usr/local/bin
>> $ 
>>
>>
>> $ sudo ryu-manager simple_switch_stp_13.py 
>> [sudo] password for ryu: 
>> loading app simple_switch_stp_13.py
>> loading app ryu.controller.ofp_handler
>> instantiating app None of Stp
>> creating context stplib
>> instantiating app simple_switch_stp_13.py of SimpleSwitch13
>> instantiating app ryu.controller.ofp_handler of OFPHandler
>> [STP][INFO] dpid=0000000000000001: Join as stp bridge.
>> ...
>> ...
>> [STP][INFO] dpid=0000000000000002: [port=1] DESIGNATED_PORT     / FORWARD
>> [STP][INFO] dpid=0000000000000002: [port=2] ROOT_PORT           / FORWARD
>> [STP][INFO] dpid=0000000000000002: [port=3] DESIGNATED_PORT     / FORWARD
>> [STP][INFO] dpid=0000000000000003: [port=1] DESIGNATED_PORT     / FORWARD
>> [STP][INFO] dpid=0000000000000003: [port=3] ROOT_PORT           / FORWARD
>> [STP][INFO] dpid=0000000000000003: [port=2] NON_DESIGNATED_PORT / BLOCK
>> [STP][INFO] dpid=0000000000000001: [port=1] DESIGNATED_PORT     / FORWARD
>> [STP][INFO] dpid=0000000000000001: [port=2] DESIGNATED_PORT     / FORWARD
>> ...
>> $
>>
>>
>> Would you mind sending us ryu-manager log as above?
>>
>>
>> Thanks,
>> Iwase
>>
>> On 2015年04月09日 19:08, FIXED-TERM Vardhan Harsha (CR/AEH4) wrote:
>>> Hello All ,
>>>  
>>> I have looped network with 3 computers running OpenVswitch version 2.0.2 and 2 host. so the network is as shown below.   
>>>                                 s1----------
>>>                                 |                  |
>>>                    h1----s2----------s3---h2
>>> Ryu is running the STP application. I have also made changes in the source code of the bpdu changing their destination address as suggested previously.
>>> But still the stp  application doesn’t work and it blocks all the ports.
>>>  
>>> Can  anyone please suggest a solution or guide me in the right direction.
>>>                                                        
>>>                                                                        
>>>  
>>> Mit freundlichen Grüßen / Best regards
>>>  
>>> *Harsha Vardhan *
>>> Communication Technology (CR/AEH4)
>>>  
>>> _fi...@de..._ <mailto:fix...@de...>
>>>  
>>>  
>>>  
>>>
>>>
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>>> source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF
>>>
>>>
>>>
>>> _______________________________________________
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>> ------------------------------------------------------------------------------
>> BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT
>> Develop your own process in accordance with the BPMN 2 standard
>> Learn Process modeling best practices with Bonita BPM through live exercises
>> http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- event?utm_
>> source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF
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