Setting Host IP Not Working

[christnp]

I've tried reverse engineering some of the p4app.json files to figure out how one might set the host IP addresses, but I can't seem to get it right. Looking at the source_routing.p4 example, I believe I can just add in the ip dictionary key, but it has no affect. Here is my p4app.json file:

{
  "program": "basic_fwd.p4",
  "language": "p4-16",
  "targets": {
    "multiswitch": {
        "auto-control-plane": false,
        "cli": true,
        "pcap_dump": true,
        "enable_log": true,
        "links": [["h1", "s1"], ["s1", "h2"]],
        "hosts": {
          "h1": {
            "ip": "10.0.1.10",
            "cmd": "python test.py $echo_msg"
          },
          "h2": {
            "ip": "10.0.2.10",
            "cmd": "python test.py $echo_msg"
          }
        },
        "switches": {
          "s1": {
              "entries": "basic_fwd_switch.config"
          }
        },
        "parameters": {
          "echo_msg": "\nfoobar\n"
        }
      }
  }
}

• I do not see the IP address change (no matter what)
• The test.py is just a simple script that prints the argument that is input. This also does not execute on startup, but I can manually run it (i.e., `h1 python test.py "test" ' outputs what I'd expect)
• Changing other parameters, e.g. links, does affect the network as expected

So I must just not understand how to properly set the host IPs and/or run the host scrips.

Appreciate the help.

R/