Abstract
Meeting IPTV's quality of service constraints (such as low latency and loss) requires designing the right combination of underlying IP-transport, restoration, and video and packet recovery methods. Carriers use link-based fast reroute (FRR) as the primary transport restoration method to achieve this goal. Although we can carefully tune the link weights in the IP routing protocol to avoid traffic overlap from FRR during single link failures, multiple failures can still cause path overlap in long-distance networks. By having FRR, IGP, and multicast protocols work in harmony and with appropriate link weight assignments, this approach can help minimize path overlap during multiple failures.
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