Dear,
Thanks you so much for your reply. But currently event of switch enter can
be applied but event of switch leave cannot be applied. I will follow your
sugestion too. Thanks you
Best regards,
Soe Ye Htet
On Thu, Jul 19, 2018, 10:43 PM Fernando Farias <fer...@gmail.com> wrote:
> Hi,
>
> you need to enable the switch context for doing that.
>
> take a sample this:
>
> _CONTEXTS = {
> 'switches': switches.Switches,
> }
>
>
> def __init__(self, *args, **kwargs):
> super(AppTest, self).__init__(*args, **kwargs)
>
> self.switches = kwargs['switches']
>
>
> this module enables switchEnter a switchLeave events.
>
>
>
>
>
>
>
>
> 2018-07-19 11:17 GMT-03:00 Soe Ye Htet <soeyehtet1...@gmail.com>:
>
>> Dear,
>>
>> Please kindly suggest me how to detect node failure. I follow the
>> following code to detect the node failure by writing the
>> event.EventSwitchLeave but I can only detect the switch enter. When I shut
>> down the node, the leaved switch cannot be detected.
>>
>> from operator import attrgetter
>> from ryu.base import app_manager
>> from ryu.controller import ofp_event
>> from ryu.controller.handler import CONFIG_DISPATCHER, MAIN_DISPATCHER,
>> DEAD_DISPATCHER
>> from ryu.controller.handler import set_ev_cls
>> from ryu.ofproto import ofproto_v1_3
>> from ryu.controller import dpset
>> from ryu.lib.packet import ipv4
>> from ryu.lib.packet import tcp
>> from ryu.lib.packet import packet
>> from ryu.lib.packet import ethernet
>> from ryu.lib.packet import ether_types
>> from ryu.topology import event, switches
>> from ryu.lib import hub
>> from ryu.topology.switches import LLDPPacket
>> from ryu import topology
>> import numpy
>> from ryu.topology.api import get_switch, get_link, get_all_link,
>> get_all_switch
>> from ryu.lib import dpid
>> from threading import Lock
>> from collections import defaultdict
>> import copy
>> import os
>> import time
>>
>> class SimpleSwitch13(app_manager.RyuApp):
>> OFP_VERSIONS = [ofproto_v1_3.OFP_VERSION]
>>
>> def __init__(self, *args, **kwargs):
>> super(SimpleSwitch13, self).__init__(*args, **kwargs)
>> self.datapaths = {}
>> self.mac_to_port = {}
>> self.switches={}
>>
>> @set_ev_cls(event.EventSwitchEnter)
>> def switch_enter_handler(self,event):
>> switch = event.switch.dp.id
>> switch_ip = event.switch.dp.address
>> self.switches[switch] = switch_ip
>> # print("List of switches", self.switches)
>>
>> @set_ev_cls(event.EventSwitchLeave)
>> def switch_leave_handler(self,event):
>> switch = event.switch.dp.id
>> switch_ip = event.switch.dp.address
>> print("deleted switch ID",switch)
>> if switch in switches:
>> del self.switches[switch]
>> print("deleted switch",self.switches)
>>
>>
>> Best regards,
>> Soe Ye Htet
>>
>>
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>> _______________________________________________
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>>
>>
>
>
> --
> "A computer is like air conditioning: it becomes useless when you open
> windows." - Linus Torvalds
>
> Fernando N. N. Farias
> Computer Science PhD. Student
> Research Group member on Computer Networks and Multimedia Communications -
> GERCOM/UFPA
> Future Internet Team - GERCOM
> Federal University of Pará
>
>
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