The Internet is constantly evolving and changing over time. Outages, attacks, upgrades, censorships, and policy changes modify the routing very frequently everywhere in the world. To give the possibility to the Internet Service Providers and to the network operators of monitoring such an evolving scenario, many organizations collect information on the routing changes and give free access to them. We propose, prototype, and evaluate a visual interface, called Upstream Visibility, to display such data. It is based on three views: (1) a Global View that, based on stacked area charts, gives the high level trend of the visibility of an IP prefix; (2) a Local View that allows the user to check the effects over time of the visibility of an IP prefix on specific locations of the network; and (3) a traditional graph Animation View. Also, we propose heuristics for producing such type of drawings, evaluating their effectiveness and performance against scenarios describing well-known Internet incidents. Further, we classify Internet issues and study how they are visualized with our interface. We then identify and describe visual patterns which can be used to spot networking issues at a glance.

互联网在不断发展和变化。中断，攻击，升级，检查和策略更改会在世界各地频繁更改路由。为了使Internet服务提供商和网络运营商有机会监视这种不断发展的情况，许多组织收集了有关路由更改的信息并免费访问它们。我们提出，原型化和评估一个可视界面，称为“上游可见性”，以显示此类数据。它基于三个视图：（1）基于堆叠面积图的全局视图给出了IP前缀可见性的高级趋势；（2）本地视图，允许用户检查IP前缀在网络特定位置上随时间变化的影响；（3）传统图形动画视图。也，我们提出启发式方法来生成此类图纸，并根据描述已知Internet事件的方案评估其有效性和性能。此外，我们对Internet问题进行分类，并研究如何使用我们的界面将其可视化。然后，我们识别并描述可用于一眼发现网络问题的视觉模式。