Can't establish a conection between two hosts in mininet by using a Ryu REST API - ryu

Question

1、I used this to create a topology in Mininet using the following command：
sudo mn --topo=tree,1,3 --controller=remote --mac
2、I use the Ryu controller "ofctl_rest.py", which processes REST requests. The REST requests send to the controller contain information which the controller use to install flow entries in the switches. I start the controller with the following command:
ryu-manager simple_switch_13.py ofctl_rest.py --verbose
3、I used the following command to clear the flow table in the switch：
dpctl del-flows
4、I configure the flow table between two hosts, H1 and H2, in the switch using the following command：
curl -X POST -d '{
"dpid": 1,
"cookie": 0,
"table_id": 0,
"priority": 1,
"flags": 1,
"match":{
"in_port":1,
"dl_src":"00:00:00:00:00:01/00:00:00:00:00:01",
"dl_dst":"00:00:00:00:00:02/00:00:00:00:00:02"
},
"actions":[
{
"type":"OUTPUT",
"port": 2
}
]
}' http://localhost:8080/stats/flowentry/add
curl -X POST -d '{
"dpid": 1,
"cookie": 0,
"table_id": 0,
"priority": 1,
"flags": 1,
"match":{
"in_port":2,
"dl_src":"00:00:00:00:00:02/00:00:00:00:00:02",
"dl_dst":"00:00:00:00:00:01/00:00:00:00:00:01"
},
"actions":[
{
"type":"OUTPUT",
"port": 1
}
]
}' http://localhost:8080/stats/flowentry/add
5、The rules are installed in the switch:
mininet> dpctl dump-flows
enter image description here
6、 I can establish a connection. If I issue the following comand in the mininet-CLI:
h1 ping h2
enter image description here
7、Based on this I continue to add the flow table between hosts H1 and H3：
curl -X POST -d '{
"dpid": 1,
"cookie": 0,
"table_id": 0,
"priority": 1,
"flags": 1,
"match":{
"in_port":3,
"dl_src":"00:00:00:00:00:03/00:00:00:00:00:03",
"dl_dst":"00:00:00:00:00:01/00:00:00:00:00:01"
},
"actions":[
{
"type":"OUTPUT",
"port": 1
}
]
}' http://localhost:8080/stats/flowentry/add
curl -X POST -d '{
"dpid": 1,
"cookie": 0,
"table_id": 0,
"priority": 1,
"flags": 1,
"match":{
"in_port":1,
"dl_src":"00:00:00:00:00:01/00:00:00:00:00:01",
"dl_dst":"00:00:00:00:00:03/00:00:00:00:00:03"
},
"actions":[
{
"type":"OUTPUT",
"port": 3
}
]
}' http://localhost:8080/stats/flowentry/add
8、The rules are installed in the switch:
mininet> dpctl dump-flows
enter image description here
9、But I can't establish a connection. If I issue the following comand in the mininet-CLI:
h1 ping h3
enter image description here
10、now,The result of the whole experiment was that H1 ping H2 succeeded and H1 ping H3 failed. If you reverse the sequence of the configuration flow table, the result is that H1 pings H3 successfully and H1 pings H2 fails:
enter image description here
11、What do I wrong? Please help me.