Low Latency 40-Gbps Ethernet IP Core User Guide

ID 683745
Date 3/08/2021
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2.8.2.7. Testbench Output Example

This section shows successful simulation using the LL 40GbE IP core testbench (<variation_name> _example_design/alt_eth_ultra/example_testbench/basic_avl_tb_top.v for Stratix V variations, or <example_design_directory> /example_testbench/basic_avl_tb_top.v for Arria 10 variations). The testbench connects the Ethernet TX lanes to the Ethernet RX lanes, so that the IP core is in an external loopback configuration. In simulation, the testbench resets the IP core and waits for lane alignment and deskew to complete successfully. The packet generator sends ten packets on the Ethernet TX lanes and the packet checker checks the packets when the IP core receives them on the Ethernet RX lanes.

The successful testbench run displays the following output:

# *****************************************
# ** Starting TX traffic...
# **
# **
# ** Sending Packet           1...
# ** Sending Packet           2...
# ** Sending Packet           3...
# ** Sending Packet           4...
# ** Sending Packet           5...
# ** Sending Packet           6...
# ** Sending Packet           7...
# ** Sending Packet           8...
# ** Sending Packet           9...
# ** Sending Packet          10...
# ** Received Packet          1...
# ** Received Packet          2...
# ** Received Packet          3...
# ** Received Packet          4...
# ** Received Packet          5...
# ** Received Packet          6...
# ** Received Packet          7...
# ** Received Packet          8...
# ** Received Packet          9...
# ** Received Packet         10...
# **
# ** Testbench complete.
# **
# *****************************************