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DCBX (Data Center Bridging Capability Exchange) supports exchanging Priority-based Flow Control (PFC) TLVs between directly connected devices. This enables automatic negotiation and consistent configuration of PFC settings to create lossless Ethernet links, which are critical for data center applications like FCoE.
| Product / Application | Software | Introduced Release |
|---|---|---|
| QFX5120-48Y | Junos OS | 18.3R1 |
| QFX5120-32C | Junos OS | 19.1R1 |
| QFX5120-48T | Junos OS | 20.2R1 |
| QFX5120-48YM | Junos OS | 20.4R1 |