In a leaf-spine data center fabric, why is ECMP combined with consistent hashing important for flow distribution?
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Incorrect.
The correct answer is D) Because it spreads flows across the multiple equal-cost spine paths while keeping all packets of a given flow on the same path, preserving in-order delivery and avoiding TCP reordering penalties
Correct Answer
Because it spreads flows across the multiple equal-cost spine paths while keeping all packets of a given flow on the same path, preserving in-order delivery and avoiding TCP reordering penalties
Leaf-spine fabrics rely on ECMP to use all available spine uplinks for load distribution. Hashing on the flow's 5-tuple ensures that every packet belonging to the same flow is consistently routed over the same path, so packets arrive in order and TCP does not misinterpret reordering as loss, which would otherwise trigger unnecessary retransmissions and throughput collapse.