Allow fabric stitched network to be the middle man for nodes across other providers.

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Use Case: Chameleon nodes communicating with Cloudlab nodes via fabric L2STS stitched network.

Old Way Of Stitching Will Still Be Supported. The config sample below is here for convenience. So that we can compare it with the new config files that support multiple stitch networks.

resource:
  - network:
      - cnet:
          provider: '{{cloudlab.cloudlab_provider }}'
          layer3: "{{ layer3.my_layer }}"
      - fabric_network:
          provider: '{{ fabric.fabric_provider }}'
          layer3: "{{ layer3.my_layer }}"
          stitch_with: '{{ network.cnet }}'

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Sample config. stitch_with supports more than network.

resource:
  - network:
      - cnet:
          provider: '{{cloudlab.cloudlab_provider }}'
          layer3: "{{ layer3.my_layer }}"
      - fabric_network:
          provider: '{{ fabric.fabric_provider }}'
          layer3: "{{ layer3.my_layer }}"
          stitch_with:
          - network: '{{ network.cnet }}'
            stitch_option:
                device_name: CloudLab-Clemson
          - network: '{{ network.chi_network }}'
            stitch_option:
                site: '{{ var.site }}'
      - chi_network:
          provider: '{{ chi.chi_provider }}'
          name: stitch_net
          layer3: "{{ layer3.my_layer }}"

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Sample config that is also supported.

resource:
  - network:
      - cnet:
          provider: '{{cloudlab.cloudlab_provider }}'
          layer3: "{{ layer3.my_layer }}"
          stitch_with:
          - network: '{{ network.fabric_network }}'
            stitch_option:
                device_name: CloudLab-Clemson
      - fabric_network:
          provider: '{{ fabric.fabric_provider }}'
          layer3: "{{ layer3.my_layer }}"
          stitch_with:
          - network: '{{ network.chi_network }}'
            stitch_option:
                site: '{{ var.site }}'

      - chi_network:
          provider: '{{ chi.chi_provider }}'
          name: stitch_net
          layer3: "{{ layer3.my_layer }}"

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Work in progress.

• Phase 1: The machinery is pretty much done. That is handling the multiple stitching network in framework classes controller, provider, ...
• Phase 2: Modifying the fabric network to handle more than one stitched network. In progress
• Phase 3: Test and Make sure old fabfed config files still work.

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Phase 2 is Done. Verified that dataplane works between cloudlab nodes and fabric nodes. Now phase 3 begins. Test and Make sure old fabfed config files still work.

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Done