I have the same device and have installed DD-WRT on it right now. 

More to the point if you backup your settings in case of failure they should persist across updates. 

On Oct 18, 2017 3:54 PM, "Mark Phillips" <mark@phillipsmarketing.biz> wrote:
I find I need to upgrade the firmware on my Netgear WNDR3400v3 routers. I actually only use them as APs. Does anyone have experience with upgrading the firmware? Specifically, doe the routers retain all the settings, or are they set back to factory defaults? There is no way to download the settings that I can see, and the documentation says to write down all the settings before upgrading. 

Thanks!

Mark

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