Hello,  After going through the simulator a few more times, here is what I have for you:  It is theoretically possible to add another network interface to the Isilon Simulator (as in my example above); HOWEVER, this greatly reduces the stability of the simulator and is not something done easily. I was able to run for around 3 hours in this state before I lost one of my virtual nodes. This is because the simulator, as it is currently designed, is still semi-reliant on hardware based scripting that has been worked-around to achieve a virtual Isilon node, so it is not written to handle hardware changes.  Based on my testing, doing aggregation testing is not yet possible with the current Isilon Simulator.
Hello  I wish I can test Isilon link aggregation with the simulator in lab but I fail to find if this is feasible/how to set this up. I don't think I ever configured link aggregation on a VM going to a virtual switch.  Thanks for feedback
Testing link aggregation with Isilon simulator ?