hi
my ryu is 3.19,and mininet is 2.2.0, i write a app to discovery the links. i
start mininet firstly,and the start the ryu, but the ryu usually can not find
the links, if i restart the ryu sereral times, it may find the correct links,it
confused me!
anyone can help me, my code is below:
@set_ev_cls(event.EventSwitchEnter)
def get_topology_data(self, ev):
switch_list = get_switch(self.topology_api_app, None)
switches=[switch.dp.id for switch in switch_list]
self.net.add_nodes_from(switches)
links_list = get_link(self.topology_api_app, None)
links=[(link.src.dpid,link.dst.dpid,{'port':link.src.port_no}) for link
in links_list]
self.net.add_edges_from(links)
links=[(link.dst.dpid,link.src.dpid,{'port':link.dst.port_no}) for link
in links_list]
self.net.add_edges_from(links)
print "**********List of links"
print self.net.edges()
the result of running is below:
root@john-S3210SH:/home/wyxapp# ryu-manager --observe-links shortestpath_13.py
loading app shortestpath_13.py
loading app ryu.topology.switches
loading app ryu.controller.ofp_handler
instantiating app None of DPSet
creating context dpset
instantiating app shortestpath_13.py of ProjectController
instantiating app ryu.topology.switches of Switches
instantiating app ryu.controller.ofp_handler of OFPHandler
**********List of links
[]
**********List of links
[]
**********List of links
[]------------------------------------------------------------------------------
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