A problem with the F-Tile Ethernet Multirate IP in the Quartus® Prime Pro Edition software version 25.3 and earlier for 2x50GE-1 port P2 in UMR3 Dynamic Reconfiguration (DR) group (100G-4 PTP) may result in PTP accuracy error exceeding 8 ns. - A problem with the F-Tile Ethernet Multirate IP in the Quartus® Prime Pro Edition software version 25.3 and earlier for 2x50GE-1 port P2 in UMR3 Dynamic Reconfiguration (DR) group (100G-4 PTP) may result in PTP accuracy error exceeding 8 ns. Description Due to a problem with the F-Tile Ethernet Multirate IP in the Quartus® Prime Pro Edition software version 25.3 and earlier, PTP may fail to meet the 8 ns accuracy requirement, specifically at the 2x50GE-1. This problem is limited to the 2x50GE-1 rate second port P2; Additionally, the F-Tile Ethernet Multirate IP does not exhibit PTP problems for rates other than 2x50GE-1. As a result of the problem described above, you may experience a similar problem in the F-Tile Dynamic Reconfiguration Suite IP available Example Design when selecting the following options from the GUI under the available Example Designs tab: (1) setting the protocol/mode to Ethernet, and (2) choosing the base variant 100G-4 PTP as shown in Table 10 of section section 3.1.2 . Specifically, the example design for implementing 100G-4 PTP to 2x50G-1 PTP does not meet the specifications outlined in the F-Tile Ethernet IP User Guide, resulting in PTP accuracy errors for 2x50G-1 PTP. Other configurations within the same design are unaffected. Below are failure signatures in the Quartus® Prime Pro Edition software version 25.3. ------------------------------ Comparison #1 ------------------------------ RX_ITS - TX_ETS : 0xffffffffc7b07c00/-14415.5156 ns TX Timestamp Fields : 0x3031323334353637BBCC RX Timestamp Fields : 0x3031323334353637BBCC TX Correction Fields : 0x16AA18191A1B1C1D RX Correction Fields : 0x16AA18191A1B1C1D ERROR: PTP Failed ---------------- Done for 50G mode---------------- Resolution As a workaround for this problem, it is recommended not to use 2x50G-1 for 2-port configurations when PTP is enabled in the F-Tile Ethernet Multirate IP in the Quartus® Prime Pro Edition software version 25.3. This problem is scheduled to be fixed in a future release of the Quartus Prime Pro Edition software. Custom Fields values: Troubleshooting 16028780718, 16028807977 ['FPGA Dev Tools Quartus® Prime Software Pro'] 25.3 ['Agilex™ 7 FPGAs and SoCs', 'Agilex™ 9 FPGAs and SoCs']