I’m a huge fan of GNS3 as a network simulator. While it’s not as CPU efficient as the fabled, not-public, nobody-has-a-copy-honest IOU (IOS-on-Unix) which obviously I know nothing about (how could I?), the graphical interface it provides to Dynamips really does make it easy to build a network topology quickly and run up a simulation.
This week though I hit a problem that I hadn’t seen before, and I’m mad about it. It all comes down to the service compress-config global configuration option.