Galaxy Tab2 fails to see functioning Netgear router
Check the MAC address on your tablet, and compare it to the MAC address listed for the tablet on your hot spot in the configuration window. If the two MAC addresses are not the same, your hot spot will not connect and an IP address will not be assigned. 

I am currently experiencing this problem where something keeps changing the MAC address in my tablet . I have not been able to resolve it, including performing a full factory reset.
I am certainly open to any advice or suggestions on this issue.
Thanks