+ def setChain(self, vnf_src_name, vnf_dst_name, vnf_src_interface=None, vnf_dst_interface=None, cmd='add-flow', weight=None):
+
+ #check if port is specified (vnf:port)
+ if vnf_src_interface is None:
+ # take first interface by default
+ connected_sw = self.DCNetwork_graph.neighbors(vnf_src_name)[0]
+ link_dict = self.DCNetwork_graph[vnf_src_name][connected_sw]
+ vnf_src_interface = link_dict[0]['src_port_id']
+ #logging.info('vnf_src_if: {0}'.format(vnf_src_interface))
+
+ for connected_sw in self.DCNetwork_graph.neighbors(vnf_src_name):
+ link_dict = self.DCNetwork_graph[vnf_src_name][connected_sw]
+ for link in link_dict:
+ #logging.info("here1: {0},{1}".format(link_dict[link],vnf_src_interface))
+ if link_dict[link]['src_port_id'] == vnf_src_interface:
+ # found the right link and connected switch
+ #logging.info("conn_sw: {2},{0},{1}".format(link_dict[link]['src_port_id'], vnf_src_interface, connected_sw))
+ src_sw = connected_sw
+
+ src_sw_inport = link_dict[link]['dst_port']
+ break
+
+ if vnf_dst_interface is None:
+ # take first interface by default
+ connected_sw = self.DCNetwork_graph.neighbors(vnf_dst_name)[0]
+ link_dict = self.DCNetwork_graph[connected_sw][vnf_dst_name]
+ vnf_dst_interface = link_dict[0]['dst_port_id']
+
+ vnf_dst_name = vnf_dst_name.split(':')[0]
+ for connected_sw in self.DCNetwork_graph.neighbors(vnf_dst_name):
+ link_dict = self.DCNetwork_graph[connected_sw][vnf_dst_name]
+ for link in link_dict:
+ if link_dict[link]['dst_port_id'] == vnf_dst_interface:
+ # found the right link and connected switch
+ dst_sw = connected_sw
+ dst_sw_outport = link_dict[link]['src_port']
+ break
+
+