Network Simulation of Very Large Delays are now possible
if you are working on deep space IP simulations, a great tool is the linux tc netem, enabling the simulations of delays, reordering, loss, duplicates, various bandwidths, ... It is very rich toolset and pretty easy to use. Since recently however, it was restricted to 274s as maximum delay. Not bad for basic simulations, but not enough for real deep space simulations. Viagénie emailed the author and maintainer of the sofware, Stephen Hemminger. After understanding the issue, he quickly fixed it and provided us the patch and it worked so nicely. Now we are able to use it for 2^64 seconds delays (that is probably many galaxies away in light speed!). Thank you so much Stephen. The patch is now pushed into the iproute2 repository.
