libns3-dev 3.36.1+dfsg-5 (s390x binary) in ubuntu lunar

 ns-3 is a discrete-event network simulator for Internet systems,
 targeted primarily for research and educational use.
 ns-3 is free software, licensed under the GNU GPLv2 license,
 and is publicly available for research, development, and use.
 ns-3 is intended as an eventual replacement for the popular
 ns-2 simulator. The project acronym “nsnam” derives
 historically from the concatenation of ns (network simulator)
 and NAM (network animator).
 .
 This package contains static libraries, header files.