Due to a problem with the Intel® Low Latency 40G Ethernet IP core, you will see the pause counters increment twice as fast as expected. You will see this behavior for both Standard Flow Control and Priority Flow Control modes.
Device Family: Intel® Arria® 10, Stratix® V GS, Stratix® V GT, Stratix® V GX
Type: Answers, Errata
Area: Intellectual Property
Last Modified: April 28, 2017
Version Found: v13.1 Update 3
Version Fixed: v16.0
Bug ID: FB: 366690;
IP: Low Latency 40G 100G Ethernet
This problem has been fixed in the Intel Quartus® Prime version 16.0 software.