2 identical devices

[Dhiren2005]

I am seeing 2 identical devices in my device manager

[Christian_R]

Dhiren2005, 

Is this on the Nighthawk app or web GUI? You may need to power cycle your router. 

Christian 

[Steve_Hammer]

From routerlogin.net >> Go to Advanced > Setup > LAN Setup.

Select Add, then give each listed Device Name a unique value for #, IP Address, Device Name, Mac Address.

After you complete your inputs, be sure to hit Apply.  After applying, you may have to log back into routerlogin.net..
Once back in, your reseved addresses should show under Basic >> Home.