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The Topology View provides a visual (cluster-wide) overview of the network topology controlled by ONOS. When the topology view is instantiated it establishes a websocket connection with the server (ONOS instance to which it is connected) and exchanges "event" messages to determine the topology state. The view is thus event-driven, with events such as addDevice, addLink, requests topology information from the server; on receipt of that information, the view renders a visualization of devices, hosts, and the links between them. The view uses the web-socket connection established by the UI framework to allow the server to drive updates to the view via topology events (such as addHost, updateDevice, etc.)

Quick Help

One of the first things to note is that by pressing the slash '/' or backslash '\' key, you can bring up the Quick Help panel. This gives an outline of the keystroke commands and mouse gestures available to you in the Topology View.  Pressing either of these keys again (or pressing the EscapeEsc key) will dismiss the panel.Image Removed

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• The top section lists global key-bindings (available on every view in the UI)
• The middle section lists view-specific key-bindings
  • The first and second columns show general commands for the Topology view
  • The third column shows commands for the currently active "Topology Overlay" (if any)
• The bottom section lists view-specific mouse gestures and other notes

The available commands listed in this panel are described in more detail in the sections below.

Toolbar

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