ttcpip stack

Dear all,
can anybody explain me what is the difference in functionality of tiny tcpip
stack suppliend with Neutrino 2.0. I can read in utility reference of
ttcpip.so about limitations of this tiny stack but I would like to ask if
anybody have trouble with this stack. I notice net manager are terminated
some times and I can’t find any dependency of this behavior in my running
system.

Thank you for help
Sebastian