But GNS3 can (if you <ahem> have license to cisco firmware) can emulate routers fully. That's really a different use case where you're designing the back-haul

But GNS3 can (if you <ahem> have license to cisco firmware) can emulate routers fully. That's really a different use case where you're designing the back-haul for the company or university. But that's super powerful as well.