RouterOS可以在Cloud运行，还有GNS3一起工作

角色

CHR and network simulation instructions

We are releasing a test version of an exciting new feature - Cloud Hosted Router (CHR).
It is a Virtual Machine image of RouterOS that has full functionality of RouterOS without any kind of conventional RouterOS license, with the limitation of 1Mbit per interface, in future, we will offer unlimited speed with a perpetual license or subscription. This allows you to use RouterOS in training classes, for testing, for experimentation or any other purpose, without the need for a 24h trial or a Demo license. Download and usage instructions Virtual lab setup example with GNS3

http://forum.mikrotik.com/viewtopic.php?f=21&t=98981
http://forum.mikrotik.com/viewtopic.php?f=2&t=99658

RouterOS在可以cloud运行，那么在RouterOS很多的功能都可以实现，如VPN Service。

而在GNS3上运行，那么学习RouterOS更加方便。