perfSONAR Requirements

• Domain
  • Domains are top level elements
• Node
  • Domains can have many nodes, nodes can only exist in one domain
• Port (Interface)
  • Domains can have many logical ports, but logical ports that are direct children of a domain can only be a child of that domain
  • Nodes can have many logical/physical ports, but logical/physical port that are direct children of a node can only be a child of that node
  • A logical port cannot be in both a domain and a node at the same time
• Links
  • Domains can have many logical/physical links, but a link can only be a child of that domain
  • Ports can have many logical/physical unidirectional links attached, but a link that is a direct child of a port can only be a child of that port
  • A link cannot be both directly beneath a port and directly beneath a domain at the same time
• Paths
  • Paths can be top-level elements if they span multiple domains or are part of a system that can produce paths that pass through multiple domains even though a given path it produces may only exist inside one domain
  • Domains can have many paths, but a path that is a direct child of a domain can only be a child of that domain
  • A path cannot be both a child of a domain and top-level at the same time
• Network
  • More like a group than the network element we've defined
  • Networks can be top-level elements if the elements in that network span multiple domains or the network is part of a system of multidomain networks, but all its elements happen to be in the same domain.
  • Domains can have multiple networks, but a network that is a direct child of a domain can only be a child of that domain.
  • A network cannot be both a child of a domain and top-level at the same time
• Services
  • Domains can have many services, services that are direct children of a domain can only be a child of that domain
  • Nodes can have many services, services that are direct children of a node can only be a child of that node
  • Ports can have many services, services that are direct children of a port can be a child of that port
  • Services cannot be direct children of a domain, node and port at the same time.