VIAVI TestCenter: PX3-100G-T12 Port Tx rate and Stream Tx rate mismatch with received PFC pauses

Knowledge Base - FAQ

Thursday, October 16, 2025

Question:

• Customer testing PFC on PX3 (both perf and routing mode). Spirent show mis-matched Port Tx Rate and Stream Tx Rate when PFC pauses are received. Issue not seen on MX3. Customer reported issue on Graph Tx rate not matching Stream Tx Rate but since the graph only available on the Port results so the issue shows to be the Port counter.

Answer:

N/A

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