Nistnet

For emulation of WAN characteristics in lab environment, we needed some software to introduce configurable delay and packet losses etc in path of IP packet transfer. Nistnet software allows us to do the same. Nistnet software is now totally modular (with release of version 2.0.10) which does not require patching of kernel, it is installed as loadable kernel module and using its command line interface or GUI based interface, different parameters like delay, packet loss, bandwidth etc. can be set for all incoming IP packets.

More information about nistnet can be found at http://www.antd.nist.gov/nistnet/, it is free software from National Institute Of Standards and Technology.