Protocol

PFC / ECN

Priority Flow Control · Explicit Congestion Notification

Lab ready Full lab

Lossless and ECN tools for datacenter Ethernet: Priority Flow Control pauses individual priorities, while Explicit Congestion Notification marks packets for end-host reaction (DCTCP/DCQCN). Misconfigured PFC causes head-of-line blocking and congestion spreading. Healthy fabrics combine careful PFC with ECN-based control.

Domains

Tags

congestionlosslesspfcecn

Sources

  • IEEE 802.1Qbb (PFC)
  • RFC 3168 (ECN)

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