Huawei, to meet your expectations, recently announced the launch of an enterprise network simulation platform eNSP for ICT practitioners. This information you can find at official Huawei website.
To be honest, I have not tested it yet. If I find time I will do it this week. I have already installed this simulator on my notebook and it looks promising. We can build a network based on AR1200 routers and enterprise switches.
The only think you have to do is to register at Huawei website, download and install the simulator.
I forgot to mention that this simulator is completely for free.
To make it easy for you, below you can find a direct link to the Huawei eNSP:
Please feedback your comments if you test it. I would like to know your opinion.