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Give it a display name, select an icon and the Enterprise Service you want to show. Click on "Add Enterprise Service"
Save Add other icons, links, then save the map and you are done.
In the example below we have added some "Interface Links" and a node icon to show connectivity, the links will change colour and thickness depending on state and load.
Selecting the East Net will show the status of the Enterprise Service
Selecting the Enterprise Service name, will open the detailed view of the Enterprise Service