I've got cacti running monitoring the switch network interfaces. I'm a little confused with how the graph depicts incoming and outgoing traffic on the interface. Can someone please exaplain what is categorised as incoming on an interface and what is outgoing?
Let's say traffic enters port1 i.e it is sent from a server, I assume that is incoming traffic into port 1, and then its also outgoing from port 1 since it is being sent out to another interface. Now lets say that same traffic is sent to port 4, port 4 will now receive that traffic, isn't this incoming traffic for port 4? and when port4 send it out to the attached server doesn't this also become outgoing traffic?
So my confusion then is that you can't get a true figure on how much traffic is flowing inbound and outbound.
Maybe its a case of taking only one reference point, but I'd appreciate if somone can clear this up.