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I replaced Comcast's Cisco DPC3939 gateway with an Archer CR700. This was back in Nov2016... Several times(3-4 so far) I will discover that either the 2.4 or the 5 SSID will no longer allow connections, and have dropped any established connections, requesting the Security Key. When a valid key is supplied, it is refused.

I can log into the router, and set the key, but it will still not accept a connection to that SSID, until I reboot the router. As soon as the router is rebooted, all is fine... This would normally be just an inconvenience, as it happens so seldom, but when it is the 2.4 SSID, I loose several security devices, and an online weather station...anyone else seeing this problem, or have any suggestions???

Thanks for your time,