Users may encounter a situation where their Killer Wireless-AC adapter will not connect to their FIOS router on the 5 GHz Wi-Fi band.
The problem seems to be due to the FIOS routers automatically choosing specific DFS channels that they may not fully support. There are a multitude of reports about this phenomenon around the web – where certain devices can connect to them while others cannot, but this post explains it reasonably well – https://www.reddit.com/r/HomeNetworking/comments/2tu2so/why_some_devices_cant_see_the_verizon_fios_g1100s.
Fortunately, the fix is simple:
- Log in to your FIOS router’s setup page. This page explains how to do so with some FIOS routers. It may not include all models. You may have to seek assistance from your ISP. https://www.howtogeek.com/197382/how-to-change-the-wi-fi-channel-on-your-verizon-fios-router/
- Change your router’s 5 GHz channel. You can use the Killer Control Center’s Wi-Fi analyzer to find which channel has the least traffic, but changing to any channel that is not a DFS channel should allow your devices to connect. Channels 36-48 and 149-165 are non-DFS channels in the United States. Your area may vary. You can reference this chart to find out which channels are DFS channels, and which are not, in your area of the world – – https://en.wikipedia.org/wiki/List_of_WLAN_channels#5_GHz_(802.11a/h/j/n/ac/ax)
- Restart your machine, if necessary, and see if you have resolved the issue.