Hi @aiedb ,
Yup, you may create a new .qsys design in newer Quartus version and regenerate the .sopcinfo file.
Or may be you can try out this Intel Design Store example design for MAX 10 Neek check the link below:
https://www.intel.com/content/www/us/en/design-example/714914/max-10-nios-ii-simple-socket-server-ethernet-example.html
And Quartus Standard v17.1 still downloadable from FPGA Software Download Center.
Related manual links:
https://www.intel.com/content/dam/support/us/en/programmable/support-resources/fpga-wiki/asset03/simple-socket-ethernet-neek.pdf
https://www.altera.com/en_US/pdfs/literature/tt/tt_nios2_tcpip.pdf
There'll be problems occur between different versions of Eclipse most probably due to they're using different drivers.
Best regards,
Sheng
p/s: If any answer from the community or Intel Support are helpful, please feel free to give best answer or rate 4/5 survey.