The Issue The network demand for media-rich content began to grow exponen- tially from 2007, particularly for video services. With distribution to 19 member companies, WIN began to receive reports that end users were experiencing tiling and artifacts in video signals distributed by the network. As the provider of IP video infra- structure, the company needed to resolve these problems in order to cope with the growing demands video was having across its network. Localizing the problem areas were difficult. Network operators could not easily identify where errors were occurring, because of a compli- cated three-layer puzzle of interlocking content delivery mechanisms: head-end, fiber optic ethernet over SONET (transport) and last mile (usually from the telephone company in the local a

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