Network monitoring planning
People have been trying to monitor their networks with pmGraph, without understanding how they might need to change the network topology in order for that to work.
I think it is essential to understand this before attempting to install pmGraph, to avoid wasted time and frustration. But it seems that the relevant documentation was relegated to an easily-missed link off the installation instructions. It was also difficult to read and understand.
I've just completely rewritten the installation planning instructions. They are relevant to any kind of network traffic monitoring, not just using pmGraph or pmacct. Comments are most welcome.