Simulating a 300 node Mesh Network

I am building a 300 node mesh network using XBee ZigBee S2C. I can test it in the lab with 5 nodes.

Is there a way I can simulate the 300 node scenario in the lab environment before actually going in the field? Is there any simulation software? Or any other approach you suggest?

Digi provide such service (called as K node) but at a cost. Check with your point of purchase about it.

I’m not familiar of any simulator software.