Device Family: Intel® Arria® 10 GT, Intel® Stratix® 10

Intel Software: Quartus Prime Pro, Quartus Prime Standard

Type: Errata

Area: Intellectual Property


Last Modified: October 21, 2020
Version Found: v19.4
Bug ID: 1508321260
IP: 25G Ethernet, 50G Ethernet

Why do the 25G Ethernet Intel® Arria® 10 FPGA IP core, Intel® 50 Gbps Ethernet (50GbE) IP core, and the 25G Ethernet Intel® Stratix® 10 FPGA IP core incorrectly report oversized frames for VLAN and Stacked VLAN Tagged frames?

Description

Due to a problem with the IP Cores listed above, oversized frames are incorrectly reported to VLAN/Stacked VLAN tagged frames when all conditions below are met:

VLAN frame

  1. VLAN Detection is enabled
  2. Sending/receiving frame length is between the maximum TX/RX frame length plus 1 to 4 octets
Stacked VLAN frame
  1. VLAN Detection is enabled
  2. Sending/receiving frame  length is between the maximum TX/RX frame length plus 1 to 8 octets

Workaround/Fix

No workaround for this problem exists in current releases of the IP.

This problem will be fixed in a future release of the Intel® Quartus® Prime software.