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The commercial version of PingPlotter adds the notion of "trending", which has added value. Let's look at two trending examples.
The first example (click to enlarge):
This plot demonstrates how both the latency of response (black line circled on graph) and the spikes in packet loss (red spikes circled on graph) increase between 5pm and midnight on the fourth router hop. But also as shown on the previous page, by looking further down the page, you can see that it's not actually impacting performance.
Let's contrast that by looking at the next graph:
Here there is a cascading series of inter-related data (bottom red circle), including jumps in both latency and in packet loss. This is very helpful for correlating problems.
Suffice it to say, the commercial version of PingPlotter brings even more value and can greater assist us in resolving network issues. Sometimes have detailed information from the customer end can be invaluable, and it's difficult to view or simulate that environment with our centralized tools.
[edited on Dec 3, 2006]