TM4C1294NCPDT: lxi

Hi,

  Sorry, doing some Google search, LXI seems to be some open standard protocol for instrumentation. I may be wrong but per discussion in this thread, LXI seems to be a layer-2 or layer-3 protocol. The TCP/IP stacks such as lwIP will not support this extension. You need to find another stack whether open-source or license version that supports this extended protocol. 

https://networkengineering.stackexchange.com/questions/59966/is-a-lan-a-layer-2-or-a-layer-3-concept-in-tcp-ip