Why does the Triple Speed Ethernet MegaCore Function not generate XOFF / XON pause frames even when the XOFF / XON registers or XOFF / XON I/O pins are asserted?

Description

Due to an issue with the Triple Speed Ethernet MegaCore® function, XON / XOFF pause frames may not be generated if you disable the Enable MAC 10/100 half duplex support option.

Resolution

Turn on the Enable MAC 10/100 half duplex support option in MegaWizard™ Plug-in Manager to workaround this issue. 

This issue has already been fixed in the Quartus II software version 15.0.1.