Why the traffic difference between NA And Cacti

[tmcdonald]

Which images are you referring to specifically? They don't look incredibly similar, as the NNA graph has a spike near the beginning and a smaller one at the end, whereas the Cacti graph is much more consistent. Again this could be due to differences between what values NNA and Cacti are grabbing, whether they are doing any averaging (and how much), how often they are getting information, etc.