Which two industry-standard high-availability features are used in data centers?
Graceful restart maintains forwarding continuity during routing-process restarts or control-plane failover, and Bidirectional Forwarding Detection rapidly detects forwarding-path failures so traffic can reconverge quickly. IPFIX is used for flow-information export, while separation of the control and forwarding planes is an architectural principle rather than this pair of high-availability mechanisms.
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