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This document discusses OSPF, load balancing, and ECMP. It begins with an overview of OSPF as an intra-AS routing protocol that uses the Dijkstra algorithm to find the shortest path. It then discusses the load balancing problem and how ECMP can provide a solution by equally splitting traffic across multiple equal-cost paths. The benefits of ECMP include load balancing, improved bandwidth utilization, and congestion mitigation. Traditional ECMP has drawbacks, but weighted ECMP can optimize end-to-end delay by distributing traffic based on pre-determined weight ratios.

鬲賵蹖 讴鬲丕亘 氐乇賮丕 亘賴 賵乇跇賳 鄄 丕卮丕乇賴 讴乇丿賴

-NAT-like function, translating the public external IP address to the internal IP address of the appropriate host-Optimize resource use, throughput, response time and overload of any single resource

Disruption is the measurement of how many flows have their paths changed due to some change in the router. 

The results indicate Weighted ECMP reduces the end-to-end delay of most pairs in the network