Priority-based Flow Control
E1023953
Priority-based Flow Control is an Ethernet link-layer mechanism that enables lossless data transmission for selected traffic classes by pausing specific priorities instead of the entire link.
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
Ethernet link-layer mechanism
ⓘ
flow control mechanism ⓘ |
| abbreviation | PFC ⓘ |
| advantageOver |
IEEE 802.3x link-level PAUSE
NERFINISHED
ⓘ
global PAUSE ⓘ |
| avoids | packet loss for specific traffic classes ⓘ |
| basedOn | IEEE 802.3x PAUSE NERFINISHED ⓘ |
| canCause | head-of-line blocking within a priority ⓘ |
| comparedTo | link-level PAUSE ⓘ |
| configuredBy | network administrators ⓘ |
| configuredWith | per-priority enable or disable settings ⓘ |
| controls | traffic per priority ⓘ |
| definedInStandard | IEEE 802.1Qbb NERFINISHED ⓘ |
| deploymentDomain |
data center networks
ⓘ
high-performance computing networks ⓘ storage area networks over Ethernet ⓘ |
| doesNotPause | entire link ⓘ |
| enables | lossless data transmission for selected priorities ⓘ |
| extends | IEEE 802.3x PAUSE NERFINISHED ⓘ |
| fieldIncludes |
per-priority pause time
ⓘ
priority enable vector ⓘ |
| frameType | MAC control PAUSE frame with priority bitmap ⓘ |
| goal |
isolate congestion to specific priorities
ⓘ
prevent head-of-line blocking for all traffic ⓘ |
| granularity | per-priority ⓘ |
| interactsWith |
Enhanced Transmission Selection
ⓘ
IEEE 802.1Qau NERFINISHED ⓘ IEEE 802.1Qaz NERFINISHED ⓘ Quantized Congestion Notification NERFINISHED ⓘ |
| operatesAtLayer | Data Link Layer ⓘ |
| operatesOn | full-duplex Ethernet links ⓘ |
| OSIlayer | Layer 2 ⓘ |
| partOf | Data Center Bridging (DCB) suite ⓘ |
| pauses | selected traffic priorities ⓘ |
| priorityRange | 0-7 ⓘ |
| requires | support on both ends of the link ⓘ |
| signaledBy | MAC control frames ⓘ |
| supports | lossless Ethernet for selected traffic classes ⓘ |
| usedFor |
FCoE
NERFINISHED
ⓘ
Fibre Channel over Ethernet NERFINISHED ⓘ RDMA over Converged Ethernet NERFINISHED ⓘ RoCE NERFINISHED ⓘ converged Ethernet fabrics ⓘ iSCSI over Ethernet ⓘ latency-sensitive traffic ⓘ loss-sensitive traffic ⓘ storage traffic over Ethernet ⓘ |
| usedIn | Data Center Bridging NERFINISHED ⓘ |
| uses |
802.1p priority values
ⓘ
Class of Service priorities ⓘ per-priority PAUSE frames ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.