If they are standard data ports/interfaces which are already graphing, have a look at this using type=mulitport_bits: Multiple Ports in Bits Graphic
For example: /graphs/id=240,241,250/type=multiport_bits
If they are standard data ports/interfaces which are already graphing, have a look at this using type=mulitport_bits: Multiple Ports in Bits Graphic
For example: /graphs/id=240,241,250/type=multiport_bits