(Work in progress...)

Overview

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, addHost, updateDevice, etc.

Instance Panel

The instance panel shows summary information about the ONOS instances in the cluster.

Summary Panel

The summary panel shows a brief summary of properties of the network.

The panel visibility can be toggled with the 'O' key.

Nodes and Links

The network topology is represented by an undirected graph of nodes and links. The nodes represent devices (switches) and hosts; the links represent, uh, links.

The D3 Force Layout algorithm is used to provide a reasonable initial layout of the nodes and links, in the absence of any other spatial information.

When nodes are addded 

Mouse Gestures

A node (device/host) may be manually repositioned (and pinned into place) by clicking on it and dragging it.

NOTE: To unpin a pinned node, hover the mouse over the node and press the 'U' (Unpin) key.

Clicking a node will select it (and deselect any other selections). Details of the selected node will appear in the Details Panel. 

The view may be panned with Cmd-drag (or Alt-drag), and zoomed with Cmd-scroll (or Alt-scroll).

Miscellaneous Controls

• Cycle labels, etc.
• Equalize mastership roles
• Reset pan/zoom
• etc.

Installing an intent between Hosts

Selecting two hosts and pressing the 'Create Host-to-Host Flow' action button on the details panel.

Visualizing Traffic

Related intents

• Related intents (next/prev)
• Monitor traffic of selected intent
• Monitor all traffic
• Show device link flows