tools/test/topos/linear-2.json

{
  "devices": [
    { "alias":  "s1", "uri": "of:0000000000000001", "annotations": { "driver": "ovs-corsa" } },
    { "alias":  "s2", "uri": "of:0000000000000002", "annotations": { "driver": "ovs-corsa" } }
  ]
}