Hi,
You can try these options.
Option 1: examples for FNET TCP/IP Stack
FNET Embedded TCP/IP Stack
all questions regarding FNET you can post here FNET - Embedded TCP/IP Stack download | SourceForge.net
Option 2: You can also check KSDK 1.3 with example for fsl_phy_driver,
HTTP Server Demo on lwIP TCP/IP Stack
Ping Demo on lwIP TCP/IP Stack
TCP Echo Demo on lwIP TCP/IP Stack
UDP Echo Demo lwIP TCP/IP Stackall questions regarding KSDK you can ask at Kinetis Software Development Kit
I hope this helps you.
In case of any questions, please let me know.
Best Regards,
Iva