We are able to graph various aspects of a device by creating services and probes, etc...
But on the links, we cannot graph multiple datasources, only the bitrates are graphable.

We can of course print the current values/rates on the link label, but we have no history.

Creating datasources and graphs would be possible too, but :
- it is highly impractical when you have tens of devices and hundreds of links to monitor
- it separates map logic and chart logic, which gives plenty of risk for a user to forget to change the chart when he changes the link

The solution could be as simple as adding a "Services" tab on the link properties page and allow us to add services or probes or functions or even some plain OID with a placeholder for the link index.

Thanks !