I had a similar issue with a 7.2 simulator where i could not login right after the deployment.  I went ahead and performed a simultaneous reboot and it worked fine after that.
Hi,  I created an EMC Isilon simulator on a VM in my VMware Vsphere client. I can open the console of the EMC Isilon simulator from Vsphere. But I am unable to ssh to the simulator or open the filer using the IP from a browser.  The simulator is running Isilon OneFS v8.1.0.0. When I try to ssh, I am getting a permission denied error. But I am entering the right credentials. ssh root[NAME] root[NAME]'s password: Permission denied, please try again  How can I connect my Isilon through ssh? Thanks a lot for your help!
Unable to ssh to EMC Isilon 8.1. simulator