Cacti

I deleted two of my router interfaces in the cactu, I wonder if there is any way to retrieve or add all the interfaces again?

Friends, I created a graph that shows the traffic interfaces of all my entries now need a function to add them all and let me know the total. I tried to create a CDEF as the prints, but it does not work. Can anyone help me with an example or tip? http://royalsolucoes.com.br/cacti/Link1.jpg http://ro...