Each link also shows network errors in the form of a black bar that grows from the base of the arrow to its tip. Links Here is an example of one of the links you might see connecting two elements on the map. Note that each side of the link has a small box near it indicating the current percent utilization on that part of the link. If you were to click on this link, you would be taken to a Web page showing the daily traffic and error statistics for this link. You could then click on either graph to see the full history data for either traffic or errors.
Some maps make use the small boxes to indicate an absolute rate of traffic.
For example, 4.5k means '4,500 bps', and 23M means '23 million bps'. Legend The possible colors for the links in the map are shown in a legend like the one seen here. Here is a link which is experiencing some errors. The error bar is sizeable enough so that it would be advisable to click on the link and investigate further. When the error rate begins to recede, the color of the error bar will begin to fade to the current background color of the link.