The GMII BFM model in TOP and TSU simulation folders are incorrect. The Preamble and SFD in the GMII mode should be 8B = 55,55,55,55,55,55,55,d5, rather than 4B = 55,55,55,5d.
This bug exists in v1.0 and v1.1 and in trunk revision 51 and before.
This bug is fixed in v1.2 and trunk revision 52. Simulation model is updated and packet parser is corrected accordingly.