How to build a P4 topology?

Getting Started with P4
1

In my experiment, I used the following JSON file to build a triangular topology.
topology

{
   "hosts": {
        "h1": {"ip": "10.0.1.1/24", "mac": "08:00:00:00:01:01",
               "commands":["route add default gw 10.0.1.10 dev eth0",
                           "arp -i eth0 -s 10.0.1.10 08:00:00:00:01:00"]},
        "h2": {"ip": "10.0.2.2/24", "mac": "08:00:00:00:02:02",
               "commands":["route add default gw 10.0.2.20 dev eth0",
                           "arp -i eth0 -s 10.0.2.20 08:00:00:00:02:00"]},
        "h3": {"ip": "10.0.3.3/24", "mac": "08:00:00:00:03:03",
               "commands":["route add default gw 10.0.3.30 dev eth0",
                           "arp -i eth0 -s 10.0.3.30 08:00:00:00:03:00"]}
    },
    "switches": {
        "s1": { "runtime_json" : "s1-runtime.json" },
        "s2": { "runtime_json" : "s2-runtime.json" },
        "s3": { "runtime_json" : "s3-runtime.json" }
    },
    "links": [
              ["h1", "s1-p1"], ["s1-p2", "s2-p2"], ["s1-p3", "s3-p2"],
              ["s3-p3", "s2-p3"], ["s2-p1", "h2"], ["s3-p1", "h3"]
    ]
}

s1_runtime

{
  "target": "bmv2",
  "p4info": "build/FindINT.p4.p4info.txt",
  "bmv2_json": "build/FindINT.json",
  "table_entries": [
    
   {
      "table": "MyEgress.swtrace",
      "default_action": true,
      "action_name": "MyEgress.add_swtrace",
      "action_params": {
         "swid": 1
       }
    },
    {
      "table": "MyIngress.ipv4_lpm",
      "match": {
        "hdr.ipv4.dstAddr": ["10.0.1.1", 32]
      },
      "action_name": "MyIngress.ipv4_forward",
      "action_params": {
        "dstAddr": "00:00:00:00:01:01",
        "port": 1
      }
    },
 
    {
      "table": "MyIngress.ipv4_lpm",
      "match": {
        "hdr.ipv4.dstAddr": ["10.0.2.0", 24]
      },
      "action_name": "MyIngress.ipv4_forward",
      "action_params": {
        "dstAddr": "08:00:00:00:02:00",
        "port": 2
      }
    },
    {
      "table": "MyIngress.ipv4_lpm",
      "match": {
        "hdr.ipv4.dstAddr": ["10.0.3.0", 24]
      },
      "action_name": "MyIngress.ipv4_forward",
      "action_params": {
        "dstAddr": "08:00:00:00:03:00",
        "port": 3
      }
    }
  ]
}

s2-runtime

{
  "target": "bmv2",
  "p4info": "build/FindINT.p4.p4info.txt",
  "bmv2_json": "build/FindINT.json",
  "table_entries": [
    {
      "table": "MyEgress.swtrace",
      "default_action": true,
      "action_name": "MyEgress.add_swtrace",
      "action_params": {
         "swid": 2
       }
    },
    {
      "table": "MyIngress.ipv4_lpm",
      "match": {
        "hdr.ipv4.dstAddr": ["10.0.2.2", 32]
      },
      "action_name": "MyIngress.ipv4_forward",
      "action_params": {
        "dstAddr": "00:00:00:00:02:02",
        "port": 1
      }
    },
    
    {
      "table": "MyIngress.ipv4_lpm",
      "match": {
        "hdr.ipv4.dstAddr": ["10.0.1.0", 24]
      },
      "action_name": "MyIngress.ipv4_forward",
      "action_params": {
        "dstAddr": "08:00:00:00:01:00",
        "port": 2
      }
    },
    {
      "table": "MyIngress.ipv4_lpm",
      "match": {
        "hdr.ipv4.dstAddr": ["10.0.3.0", 24]
      },
      "action_name": "MyIngress.ipv4_forward",
      "action_params": {
        "dstAddr": "08:00:00:00:03:00",
        "port": 3
      }
    }
  ]
}

s3-runtime

{
  "target": "bmv2",
  "p4info": "build/FindINT.p4.p4info.txt",
  "bmv2_json": "build/FindINT.json",
  "table_entries": [
    {
      "table": "MyEgress.swtrace",
      "default_action": true,
      "action_name": "MyEgress.add_swtrace",
      "action_params": {
         "swid": 3
       }
    },
    {
      "table": "MyIngress.ipv4_lpm",
      "match": {
        "hdr.ipv4.dstAddr": ["10.0.3.3", 32]
      },
      "action_name": "MyIngress.ipv4_forward",
      "action_params": {
        "dstAddr": "00:00:00:00:03:03",
        "port": 1
      }
    },
    {
      "table": "MyIngress.ipv4_lpm",
      "match": {
        "hdr.ipv4.dstAddr": ["10.0.1.0", 24]
      },
      "action_name": "MyIngress.ipv4_forward",
      "action_params": {
        "dstAddr": "08:00:00:00:01:00",
        "port": 2
      }
    },
    {
      "table": "MyIngress.ipv4_lpm",
      "match": {
        "hdr.ipv4.dstAddr": ["10.0.2.0", 24]
      },
      "action_name": "MyIngress.ipv4_forward",
      "action_params": {
        "dstAddr": "08:00:00:00:02:00",
        "port": 3
      }
    }
  ]
}

The program can run. But when I enter the pingall command in mininet, I find that a host can send messages to another, but the latter doesn’t reply. When I change the topology to the triangular one in the basic section of the GitHub tutorial, all hosts can ping each other.
Is there anyone who can help me?