rharland2012 is right on track with the Network Engineer's Toolkit.
You can use the Real-Time Interface Monitor from within the Toolkit and create a monitor for the device/interface in question then publish it to web, i.e. create an html monitor that you can publish within NPM.
This is one of the two ways I know of to be able to see "Real-Time" monitoring from within NPM.
The other is with Toolkit Integration on a Workstation. From within the NPM website there should be an Icon next to any Interface. Just click on the RT Interface Monitor Icon and voila, you are monitoring in Real-Time.
If you haven't ever used the Toolkit before or don't have a copy, SW offers a trial that I would advise you to download and see if this is what you are trying to accomplish.
I hope this helps and is what you are looking to see and monitor.
B