About link lines

From the WhatsUp Gold console, in the Map View, you can use Link lines to get a graphical view of the network link (the Interface service) between two devices. Link lines can also show the status of any service which has an Active Monitor on the device.

The following example shows a map with link lines displayed.

Router 1 shows a connecting link to device RRA and this link is currently up. Also shown are eight unconnected links, all of which represent interfaces on the router. One of the unconnected links is disabled.
Connecting links represent a service, for example an interface, that connects two devices. They are drawn as lines from one device to another. If two devices have mutual links, the single line can consist of more than one color (if one object is up and the other is down). The center-point of the line back to the up object is green, while the other half of the line going to the down object is red. In essence, the color of the line represents the state of the service on the host that the color touches.

Example

If the red part of the line touches "System A" and the green part of the line touches "System B", then we know that some service on "System A" is the problem.
JMA is a workstation that shows two unconnected links that are currently up. These are Ping and FTP monitors, found under Device Properties > Active Monitors.
RRA is an FTP Server that is currently down and shows five unconnected links, two of which are down.

By default, links are rendered in one of four colors:

Green indicates an Active Monitor that is up (for example, but not limited to, Interface). This includes services that have not yet been polled.
Red indicates a down Active Monitor.
Gray indicates a service listed in the device's Active Monitors list, but not currently monitored.
Orange indicates that the device is currently in maintenance mode.

Note: These colors are subject to change if a user changes the colors of the default device states.

For more information, see Using link lines.