Hi William,
1. Please ensure to use the latest MCSDK(3.00.03.15) binaries for the testing.
http://software-dl.ti.com/sdoemb/sdoemb_public_sw/mcsdk/latest/index_FDS.html
2. Configure ip address using ifconfig for eth0 and eth1 ports.
3. Ping the host machine and see the issue is still persists.
Also, refer below thread which may help you.
http://e2e.ti.com/support/embedded/linux/f/354/t/297151.aspx
Thanks.