PFC-MIB

Description: Manages IEEE 802.1Qbb Priority Flow Control (PFC) per-priority pause configuration and pause-frame counters on DCB Ethernet ports.

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PFC-MIB implements management objects for IEEE 802.1Qbb Priority-based Flow Control (PFC) on Data Center Bridging (DCB) Ethernet ports, a lossless-Ethernet feature used to pause traffic per priority class rather than the whole link. Based on its module description and single referenced group, it exposes configuration objects for enabling and tuning PFC per priority on switch ports, and in a fuller implementation would also include per-priority pause-frame transmit/receive counters. It is used to monitor the software/configuration status of PFC on DCB-capable Ethernet interfaces, such as which priorities have PFC enabled, which helps diagnose head-of-line blocking or unexpected pausing in converged storage/data-center-bridging fabrics. It directly depends on and extends concepts from the IEEE 802.1Qbb standard and typically coexists with related DCB MIBs (e.g., ETS/DCBX MIBs) on the same platform. It is deployed on data center switches supporting Fibre Channel over Ethernet (FCoE) or other lossless-Ethernet DCB fabrics. Network engineers evaluating or troubleshooting this functionality can download the PFC-MIB file directly to load it into their MIB browser.

An administrator would inspect the agentPfcCfgGroup configuration objects to verify which priority classes have PFC enabled on a given switch port, confirming alignment with the intended lossless-traffic classes (e.g., FCoE storage traffic). If a converged network experiences unexpected latency spikes, checking whether PFC is enabled on the wrong priority via this group can reveal a misconfiguration causing head-of-line blocking. Because only one object group is listed in the sample objects, per-priority pause-frame counters are not confirmed as present in this particular module revision.

Manages Priority-based Flow Control (PFC) feature configuration and statistics per interface on Quanta switches.