There is a resource called "Custom Object Resource" you can add under "Customize Page" Try that out. You are already tracking the interface data. It is now just display issue.
Thanks to @rstoney00 for the suggestion, and I am able to add a display like the following...
Now, is it possible that I can have line charts instead of dots? I am planning to add more resources and monitor more interfaces, but wondering if the data can be shown in real time.
I think that Interface Monitor is what I need, but can it be seen by other users such as help desk people once I have set it up? How many interfaces can I add? Can it stay up running 24/7?