Hi,
I think this issue can be related to that fact, that dpset
consumes EventOFPSwitchFeatures event to populate it's switch table (as
shown in ryu-manager output):
› ryu-manager myapp --verbose
loading app myapp
loading app ryu.controller.ofp_handler
instantiating app None of DPSet
creating context dpset
instantiating app myapp of MyApp
instantiating app ryu.controller.ofp_handler of OFPHandler
BRICK MyApp
CONSUMES EventOFPSwitchFeatures
CONSUMES EventOFPPacketIn
BRICK dpset
CONSUMES EventOFPSwitchFeatures
CONSUMES EventOFPStateChange
CONSUMES EventOFPPortStatus
I think the best solution is to get switch info in different handler (e.g.
wsgi app), not in switch_features_handler.
Best Regards,
Nick
сб, 17 сент. 2016 г. в 14:01, Alan Wang <alan820...@gmail.com>:
> Hi,
>
> Thanks for your reply kindly.
>
> I tried your code. It can run to achieve my goal.
>
> But i tried to add them to the function switch_features_handle of
> simple_switch_13.
>
> The result returned empty dict. Why?
>
> @set_ev_cls(ofp_event.EventOFPSwitchFeatures, CONFIG_DISPATCHER)
> def switch_features_handler(self, ev):
> datapath = ev.msg.datapath
> ofproto = datapath.ofproto
> parser = datapath.ofproto_parser
> match = parser.OFPMatch()
> actions = [parser.OFPActionOutput(ofproto.OFPP_CONTROLLER,
> ofproto.OFPCML_NO_BUFFER)]
> self.add_flow(datapath, 0, match, actions)
> switches = self.dpset.get_all()
> mac_addresses = [(s[0],
> s[1].ports[ofproto_v1_3.OFPP_LOCAL].hw_addr)
> for s in switches]
> print("mac_addresses {}".format(mac_addresses))
>
> Thanks,
>
> Regards,
>
> Alan
>
> 2016-09-17 6:32 GMT+08:00 Nick Sedelnikov <n.sedelni...@gmail.com>:
>
>> Alan,
>>
>> I've checked this on simple application:
>> """
>> from ryu.base import app_manager
>> from ryu.controller import ofp_event
>> from ryu.controller.dpset import DPSet
>> from ryu.controller.handler import MAIN_DISPATCHER, set_ev_cls
>> from ryu.ofproto import ofproto_v1_3
>>
>>
>> class MyApp(app_manager.RyuApp):
>> OFP_VERSIONS = [ofproto_v1_3.OFP_VERSION]
>>
>> _CONTEXTS = {'dpset': DPSet}
>>
>> def __init__(self, *args, **kwargs):
>> super(MyApp, self).__init__(*args, **kwargs)
>> self.dpset = kwargs['dpset']
>>
>> @set_ev_cls(ofp_event.EventOFPPacketIn, MAIN_DISPATCHER)
>> def on_packetin(self, ev):
>> switches = self.dpset.get_all()
>> mac_addresses = [(s[0],
>> s[1].ports[ofproto_v1_3.OFPP_LOCAL].hw_addr)
>> for s in switches]
>> print("mac_addresses {}".format(mac_addresses))
>> """
>>
>> First I've started mn like this: `mn --topo=linear,2 --controller=remote`
>> Then I started `ryu-manager myapp --verbose`, and called `pingall` in mn.
>> On packetin i received:
>> >> EVENT ofp_event->MyApp EventOFPPacketIn
>> >> mac_addresses [(1, '3e:a1:63:df:fa:4e'), (2, '8e:8e:51:8f:df:47')]
>>
>> Hope it helps.
>>
>> If it still doesn't work check for correct switch registration by dpset -
>> there must be following lines in output (with --verbose flag set):
>> >> EVENT ofp_event->dpset EventOFPStateChange
>> >> DPSET: register datapath <ryu.controller.controller.Datapath object at
>> 0x7ff879a68550>
>>
>>
>> Nick
>>
>> пт, 16 сент. 2016 г. в 18:07, Alan Wang <alan820...@gmail.com>:
>>
>>> Hi,
>>>
>>> Thanks for your reply.
>>>
>>> I tried your code and simulate it with mininet.
>>>
>>> But it returns empty list.
>>>
>>> How to solve the problem?
>>>
>>> Thanks,
>>>
>>> Alan
>>>
>>> 2016-09-16 21:46 GMT+08:00 Nick Sedelnikov <n.sedelni...@gmail.com>:
>>>
>>>> Hi,
>>>>
>>>> To know all registered switches try:
>>>> """
>>>> from ryu.controller.dpset import DPSet
>>>>
>>>> class MyApp(app_manager.RyuApp):
>>>> # ...
>>>>
>>>> _CONTEXTS = {'dpset': DPSet}
>>>>
>>>> def __init__(self, *args, **kwargs):
>>>> super(MyApp, self).__init__(*args, **kwargs)
>>>> # ...
>>>> self.dpset = kwargs['dpset']
>>>> # ...
>>>> """
>>>> Then fetch switches:
>>>> >> switches = self.dpset.get_all()
>>>> >> mac_addresses = [(s[0], s[1].ports[OFPP_LOCAL].hw_addr) for s in
>>>> switches]
>>>> It will return tuple(dpid, mac_address), like this:
>>>> [(1, '0a:74:ba:ce:11:47'), (2, '32:5b:11:d9:72:4f')]
>>>>
>>>>
>>>>
>>>> пт, 16 сент. 2016 г. в 15:25, Alan Wang <alan820...@gmail.com>:
>>>>
>>>>> Hi All,
>>>>>
>>>>> I want to know the mac address of all switches from controller. How to
>>>>> get the mac
>>>>>
>>>>> address of switch?
>>>>>
>>>>> Thanks,
>>>>>
>>>>> Alan
>>>>>
>>>>> ------------------------------------------------------------------------------
>>>>> _______________________________________________
>>>>> Ryu-devel mailing list
>>>>> Ryu-devel@lists.sourceforge.net
>>>>> https://lists.sourceforge.net/lists/listinfo/ryu-devel
>>>>>
>>>>
>>>
>
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